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Xianghu Li
Key Laboratory of Watershed Geographic Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China

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Journal article
Published: 27 April 2021 in Physics and Chemistry of the Earth, Parts A/B/C
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Climate change and human activities have impacted the Poyang Lake Basin (PLB) greatly over the past decades, and have significantly changed the local ecological environment and hydrological cycle. Based on the daily records from 16 meteorological stations and 7 gauging stations in the Poyang Lake Basin from 1960 to 2015, the contributions of climate change and human activities to runoff variations under different timescales (annual, flood season, and non-flood season) were explored using the Mann-Kendall, Moving-T test, and a linear regression model. The results showed that on annual timescale, climate change accounted for 91.88% of the increased runoff depth. However, intensive human activities in the subbasins would have reduced the runoff depth in the Poyang Lake Basin. The impact of climate change on the variation of runoff depth increased during the flood season. Climate change and human activities contributed ~57% and ~42%, respectively. Both climate change and human activities could increase the runoff depth during the non-flood season.

ACS Style

Xiangyong Lei; Lu Gao; Jianhui Wei; Miaomiao Ma; Ligang Xu; Hongxiang Fan; Xianghu Li; Jianyun Gao; Haofei Dang; Xingwei Chen; Weihua Fang. Contributions of climate change and human activities to runoff variations in the Poyang Lake Basin of China. Physics and Chemistry of the Earth, Parts A/B/C 2021, 123, 103019 .

AMA Style

Xiangyong Lei, Lu Gao, Jianhui Wei, Miaomiao Ma, Ligang Xu, Hongxiang Fan, Xianghu Li, Jianyun Gao, Haofei Dang, Xingwei Chen, Weihua Fang. Contributions of climate change and human activities to runoff variations in the Poyang Lake Basin of China. Physics and Chemistry of the Earth, Parts A/B/C. 2021; 123 ():103019.

Chicago/Turabian Style

Xiangyong Lei; Lu Gao; Jianhui Wei; Miaomiao Ma; Ligang Xu; Hongxiang Fan; Xianghu Li; Jianyun Gao; Haofei Dang; Xingwei Chen; Weihua Fang. 2021. "Contributions of climate change and human activities to runoff variations in the Poyang Lake Basin of China." Physics and Chemistry of the Earth, Parts A/B/C 123, no. : 103019.

Journal article
Published: 30 November 2020 in Remote Sensing
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Rainfall erosivity (RE) is a significant indicator of erosion capacity. The application of Tropical Rainfall Measuring Mission (TRMM) rainfall products to deal with RE estimation has not received much attention. It is not clear which temporal resolution of TRMM data is most suitable. This study quantified the RE in the Poyang Lake basin, China, based on TRMM 3B42 3-hourly, daily, and 3B43 monthly rainfall data, and investigated their suitability for estimating RE. The results showed that TRMM 3-hourly product had a significant systematic underestimation of monthly RE, especially during the period of April–June for the large values. The TRMM 3B42 daily product seems to have better performance with the relative bias of 3.0% in summer. At the annual scale, TRMM 3B42 daily and 3B43 monthly data had acceptable accuracy, with mean error of 1858 and −85 MJ∙mm/ha∙h and relative bias of 18.3% and −0.85%, respectively. A spatial performance analysis showed that all three TRMM products generally captured the overall spatial patterns of RE, while the TRMM 3B43 product was more suitable in depicting the spatial characteristics of annual RE. This study provides valuable information for the application of TRMM products in mapping RE and risk assessment of soil erosion.

ACS Style

Xianghu Li; Zhen Li; Yaling Lin. Suitability of TRMM Products with Different Temporal Resolution (3-Hourly, Daily, and Monthly) for Rainfall Erosivity Estimation. Remote Sensing 2020, 12, 3924 .

AMA Style

Xianghu Li, Zhen Li, Yaling Lin. Suitability of TRMM Products with Different Temporal Resolution (3-Hourly, Daily, and Monthly) for Rainfall Erosivity Estimation. Remote Sensing. 2020; 12 (23):3924.

Chicago/Turabian Style

Xianghu Li; Zhen Li; Yaling Lin. 2020. "Suitability of TRMM Products with Different Temporal Resolution (3-Hourly, Daily, and Monthly) for Rainfall Erosivity Estimation." Remote Sensing 12, no. 23: 3924.

Research article
Published: 03 February 2019 in Advances in Meteorology
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Spatiotemporal changes in extreme precipitation at local scales in the context of climate warming are overwhelmingly important for prevention and mitigation of water-related disasters and also provide critical information for effective water resources management. In this study, the variability and trends of extreme precipitation in both time and space in the Poyang Lake basin over the period of 1960–2012 are analyzed. Also, changes in precipitation extremes with topography are investigated, and possible causes are briefly discussed. The results show that extreme precipitation over the Poyang Lake basin is intensified during the last 50 years, especially the increasing trends are more significant before the end of the 1990s. Moreover, high contribution rates of extreme precipitation to the total rainfall (40–60%) indicated that extreme precipitation plays an important role to the total water resources in this area. The precipitation extremes also exhibited a significant spatial dependence in the basin. The northeastern and eastern areas are exposed to high risk of flood disaster with the higher frequency of extreme precipitation events. In addition, the distribution of precipitation extremes had a clear dependence on elevation, and the topography is an important factor affecting the variability of extreme precipitation over the Poyang Lake basin.

ACS Style

Xianghu Li; Qi Hu. Spatiotemporal Changes in Extreme Precipitation and Its Dependence on Topography over the Poyang Lake Basin, China. Advances in Meteorology 2019, 2019, 1 -15.

AMA Style

Xianghu Li, Qi Hu. Spatiotemporal Changes in Extreme Precipitation and Its Dependence on Topography over the Poyang Lake Basin, China. Advances in Meteorology. 2019; 2019 ():1-15.

Chicago/Turabian Style

Xianghu Li; Qi Hu. 2019. "Spatiotemporal Changes in Extreme Precipitation and Its Dependence on Topography over the Poyang Lake Basin, China." Advances in Meteorology 2019, no. : 1-15.

Journal article
Published: 15 January 2019 in Remote Sensing
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This study assesses the suitability of five popular satellite-based precipitation products in modeling water balance in a humid region of China during the period 1998–2012. The satellite-based precipitation products show similar spatial patterns with varying degrees of overestimation or underestimation, compared with the gauged precipitation. A distributed hydrological model is used to evaluate the suitability of satellite-based precipitation products in simulating streamflow, evapotranspiration and soil moisture. The simulations of streamflow and evapotranspiration forced by the MSWEP precipitation perform best among the five satellite-based precipitation products, where the Kling-Gupta efficiency (KGE) between the simulated and observed streamflow ranges from 0.75 to 0.91, and the KGE between the simulated and observed evapotranspiration ranges from 0.46 to 0.61. However, the KGE between the simulated and observed soil moisture is negative, indicating that the performance of soil moisture simulation forced by satellite-based precipitation is poor. In addition, this study finds the spatial pattern of simulated streamflow is dominated by the distribution of precipitation, whereas the distribution of evapotranspiration and soil moisture is controlled by the parameters of the hydrological model. This study is useful for the improvement of hydrological modeling based on remote sensing and the monitoring of regional water resources.

ACS Style

Dan Zhang; Xiaomang Liu; Peng Bai; Xiang-Hu Li. Suitability of Satellite-Based Precipitation Products for Water Balance Simulations Using Multiple Observations in a Humid Catchment. Remote Sensing 2019, 11, 151 .

AMA Style

Dan Zhang, Xiaomang Liu, Peng Bai, Xiang-Hu Li. Suitability of Satellite-Based Precipitation Products for Water Balance Simulations Using Multiple Observations in a Humid Catchment. Remote Sensing. 2019; 11 (2):151.

Chicago/Turabian Style

Dan Zhang; Xiaomang Liu; Peng Bai; Xiang-Hu Li. 2019. "Suitability of Satellite-Based Precipitation Products for Water Balance Simulations Using Multiple Observations in a Humid Catchment." Remote Sensing 11, no. 2: 151.

Journal article
Published: 03 February 2018 in Atmosphere
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Soil erosion is one of the most critical environmental hazards in the world. Understanding the changes in rainfall erosivity (RE) and erosivity density (ED), as well as their affecting factors, at local and catchment scales in the context of climate warming is an important prerequisite of soil erosion prevention and soil loss risk assessment. The present study identified the variability and trends of RE and ED in terms of both time and space in the Ganjiang River catchment over the period of 1960–2012, and also analyzed and discussed the impact of climate change. The results show that RE and ED in the catchment had great monthly variations and high year-to-year variability. Both presented long-term increasing trends over the entire study period. The highest RE and ED were observed in June and in the eastern and northeast parts of the catchment, which indicated that June was the most susceptible month for soil erosion in this area and the lower reaches of the Ganjiang River was the riskiest area for soil erosion. Finally, the East Asian summer monsoon and climate change were highly correlated with changes in RE and ED.

ACS Style

Xianghu Li; Xuchun Ye. Variability of Rainfall Erosivity and Erosivity Density in the Ganjiang River Catchment, China: Characteristics and Influences of Climate Change. Atmosphere 2018, 9, 48 .

AMA Style

Xianghu Li, Xuchun Ye. Variability of Rainfall Erosivity and Erosivity Density in the Ganjiang River Catchment, China: Characteristics and Influences of Climate Change. Atmosphere. 2018; 9 (2):48.

Chicago/Turabian Style

Xianghu Li; Xuchun Ye. 2018. "Variability of Rainfall Erosivity and Erosivity Density in the Ganjiang River Catchment, China: Characteristics and Influences of Climate Change." Atmosphere 9, no. 2: 48.

Research article
Published: 25 September 2017 in Hydrological Processes
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The relative timing of peak flows (RTPF) from tributaries has significant influence on flood occurrence at their confluence. This study is aimed at (1) analysing the characteristics of the RTPF of the 5 recharging rivers in the Poyang Lake catchment and the Yangtze River during the period of 1960–2012, and (2) employing a physically‐based hydrodynamic model (MIKE 21) to quantify the effects of RTPF on flood behaviour in the Poyang Lake (the largest freshwater lake in China). The results show that short RTPF, or close occurrence of peak flows, triggers flood in the Poyang Lake more easily. More than 75% of total flood events in the study period occurred with RTPF less than 60 days, and more than 55% of the events occurred with RTPF less than 30 days. The hydrodynamic simulation revealed that the date of flood peak in the lake was postponed by 4–7 days and the flood stage raised by 0.69 m because of the delay of peak flows from the upstream rivers/tributaries. On the other hand, earlier start of the Yangtze River peak flow led to flood peak in the lake 6–13 days earlier. Additionally, the duration of high lake water levels was extended by 9–12 days when the RTPF shortened, and the flood hydrograph of the Poyang Lake changed from a flat to a flashy type. These results indicate that an enlarged RTPF between the upstream rivers and the Yangtze River could be an effective way to prevent flood disasters in the Poyang Lake, a method apparently being adopted in the operation of the Three Gorges Dam. The RTPF should be considered and integrated when developing flood prevention and management plans in the Poyang Lake, as well as in other similar regions in the world.

ACS Style

Xianghu Li; Qi Zhang; Qi Hu; Dan Zhang; Xuchun Ye. Lake flooding sensitivity to the relative timing of peak flows between upstream and downstream waterways: A case study of Poyang Lake, China. Hydrological Processes 2017, 31, 4217 -4228.

AMA Style

Xianghu Li, Qi Zhang, Qi Hu, Dan Zhang, Xuchun Ye. Lake flooding sensitivity to the relative timing of peak flows between upstream and downstream waterways: A case study of Poyang Lake, China. Hydrological Processes. 2017; 31 (23):4217-4228.

Chicago/Turabian Style

Xianghu Li; Qi Zhang; Qi Hu; Dan Zhang; Xuchun Ye. 2017. "Lake flooding sensitivity to the relative timing of peak flows between upstream and downstream waterways: A case study of Poyang Lake, China." Hydrological Processes 31, no. 23: 4217-4228.

Journal article
Published: 22 August 2016 in Hydrology Research
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Groundwater plays an important role in supplying water to vegetation in floodplain wetlands. Exploring the effect of water table depth (WTD) on vegetation transpiration is essential to increasing understanding of interactions among vegetation, soil water, and groundwater. In this study, a HYDRUS-1D model was used to simulate the water uptake of two typical vegetation communities, Artemisia capillaris and Phragmites australis, in a floodplain wetland (Poyang Lake wetland, China). Vegetation transpiration was compared for two distinct hydrological conditions: high water table (2012) and low water table (2013). Results showed that vegetation transpiration in the main growth stage (July–October) was significantly influenced by WTD. Under high water table conditions, transpiration of A. capillaris and P. australis communities in the main growth stage totaled 334 and 735 mm, respectively, accounting for over 90% of the potential transpiration. Under low water table conditions, they decreased to 203 and 510 mm, respectively, due to water stress, accounting for merely 55% of the potential transpiration. Scenario simulations found different linear relationships between WTD and the ratio of groundwater contribution to vegetation transpiration. An increase of 1 m in WTD in the main growth stage may reduce the ratio by approximately 25%.

ACS Style

Xiuli Xu; Q. Zhang; Yunliang Li; Xianghu Li. Evaluating the influence of water table depth on transpiration of two vegetation communities in a lake floodplain wetland. Hydrology Research 2016, 47, 293 -312.

AMA Style

Xiuli Xu, Q. Zhang, Yunliang Li, Xianghu Li. Evaluating the influence of water table depth on transpiration of two vegetation communities in a lake floodplain wetland. Hydrology Research. 2016; 47 (S1):293-312.

Chicago/Turabian Style

Xiuli Xu; Q. Zhang; Yunliang Li; Xianghu Li. 2016. "Evaluating the influence of water table depth on transpiration of two vegetation communities in a lake floodplain wetland." Hydrology Research 47, no. S1: 293-312.

Journal article
Published: 25 July 2016 in Water Policy
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Poyang Lake, one of the most frequently flooded regions in China, connects with the Yangtze River and the five sub-tributaries in the local catchment. The lake's hydrological regime is complicated by a complex hydraulic connection and strong river–lake interaction, especially for the extreme hydrological regime. This study analyzes the relationships between the lake level changes and the flow regimes of Yangtze River and local catchment during the flood season and employs a physically based hydrodynamic model to quantify their relative contributions to the development of floods. The study found that the large catchment runoff and Yangtze River discharge were both significant contributors to flood development but that their contributions were unevenly distributed in time and space. The local catchment imposed more influence during the period of April–May and at the middle parts of the lake, and its influence decreased toward the north and south; in contrast, the most remarkable lake level changes were observed in July–August and at the northern lake for the Yangtze River cases, and these changes reduced from north to south. Moreover, Yangtze River imposed far stronger influences on the lake level changes than the catchment runoff and dominated the duration of floods to a great extent.

ACS Style

Xianghu Li; Jing Yao; Yunliang Li; Qi Zhang; Chong-Yu Xu. A modeling study of the influences of Yangtze River and local catchment on the development of floods in Poyang Lake, China. Water Policy 2016, 47, 102 -119.

AMA Style

Xianghu Li, Jing Yao, Yunliang Li, Qi Zhang, Chong-Yu Xu. A modeling study of the influences of Yangtze River and local catchment on the development of floods in Poyang Lake, China. Water Policy. 2016; 47 (S1):102-119.

Chicago/Turabian Style

Xianghu Li; Jing Yao; Yunliang Li; Qi Zhang; Chong-Yu Xu. 2016. "A modeling study of the influences of Yangtze River and local catchment on the development of floods in Poyang Lake, China." Water Policy 47, no. S1: 102-119.

Journal article
Published: 06 January 2016 in Water Policy
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Based on the estimation of standardized precipitation–evapotranspiration index (SPEI) and standardized runoff index (SRI), this study investigated the variability and correlation of hydrological drought and meteorological drought in a humid climate region – the Poyang Lake catchment in China. Results indicate that the occurrences of hydrological droughts in the catchment are different from those of meteorological drought on both a seasonal and annual basis. However, annual variability of both indices showed the same periodic variation characteristics during the study period. With comparison of the performance of SPEI and SRI time series at different timescales, our observation reveals that the two drought indices show a higher degree of similarity and correlation as timescales increased. In addition, SRI is found to be less variable than SPEI at shorter timescales and it shows an obvious hydrologic delay of about 1–2 months in response to SPEI at timescales >12 months. Due to hydrologic detention of subsurface soil moisture, shallow groundwater and perhaps reservoir storage, a 2-month timescale of SPEI is found to be more appropriate for river discharge monitoring, especially for those rivers with similar drainage area, climate and geographical conditions as in this study region.

ACS Style

Xuchun Ye; Xianghu Li; Chong-Yu Xu; Qi Zhang. Similarity, difference and correlation of meteorological and hydrological drought indices in a humid climate region – the Poyang Lake catchment in China. Water Policy 2016, 47, 1211 -1223.

AMA Style

Xuchun Ye, Xianghu Li, Chong-Yu Xu, Qi Zhang. Similarity, difference and correlation of meteorological and hydrological drought indices in a humid climate region – the Poyang Lake catchment in China. Water Policy. 2016; 47 (6):1211-1223.

Chicago/Turabian Style

Xuchun Ye; Xianghu Li; Chong-Yu Xu; Qi Zhang. 2016. "Similarity, difference and correlation of meteorological and hydrological drought indices in a humid climate region – the Poyang Lake catchment in China." Water Policy 47, no. 6: 1211-1223.

Research article
Published: 28 July 2015 in Advances in Meteorology
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This paper presents a quantitative investigation of the variability of meteorological dry/wet conditions of the Poyang Lake catchment during 1960–2010 by using the standardized precipitation-evapotranspiration index (SPEI) based on daily observations of 14 meteorological stations across the catchment. Extending from previous studies, the background of the encounter and overlap of multitimescales of meteorological dry/wet episodes for several severe drought and flood events were discussed. In addition, the possible impacts of temperature changes on dry/wet variability were also examined by the comparison of SPEI and standardized precipitation index (SPI) variations at multitimescales during the study period. Major results show that the occurrence of dry/wet condition has become increasingly frequent in the recent two decades, especially the extreme wet episodes in 1990s and the extreme dry episodes in 2000s. Historically, the encounter and overlap of multitimescales of meteorological dry/wet episodes plays an important role in the occurrence of several severe drought and flood events. The study concluded that the impact of temperature anomaly to the dry/wet variability cannot be neglected.

ACS Style

Xu-Chun Ye; Yun-Liang Li; Xianghu Li; Chong-Yu Xu; Qi Zhang. Investigation of the Variability and Implications of Meteorological Dry/Wet Conditions in the Poyang Lake Catchment, China, during the Period 1960–2010. Advances in Meteorology 2015, 2015, 1 -11.

AMA Style

Xu-Chun Ye, Yun-Liang Li, Xianghu Li, Chong-Yu Xu, Qi Zhang. Investigation of the Variability and Implications of Meteorological Dry/Wet Conditions in the Poyang Lake Catchment, China, during the Period 1960–2010. Advances in Meteorology. 2015; 2015 ():1-11.

Chicago/Turabian Style

Xu-Chun Ye; Yun-Liang Li; Xianghu Li; Chong-Yu Xu; Qi Zhang. 2015. "Investigation of the Variability and Implications of Meteorological Dry/Wet Conditions in the Poyang Lake Catchment, China, during the Period 1960–2010." Advances in Meteorology 2015, no. : 1-11.

Journal article
Published: 30 April 2015 in Water
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The dry-wet abrupt transition (DWAT) is a typical anomaly of precipitation at the subseasonal scale and may result in a severer and greater hydro-meteorological hazard. This paper identified and examined the DWAT events in terms of precipitation in Poyang Lake basin, including both from dry to wet (DTW) and from wet to dry (WTD), during the period of 1960–2010 and analyzed its characteristics of temporal and spatial distribution and intra- and inter-annual tendencies based on the Mann–Kendall (M–K) test. The results revealed that the DTW was inclined to occur in March, but WTD in July and September; the inter-annual variation of the DWAT index showed a feeble long-term increasing trend in July and a decreasing trend in September with a Z-statistic of 1.81 and −1.44, respectively, although none of these trends achieved the statistical significance level (α = 0.05); the north parts of Poyang Lake basin experienced more DWAT events during the last 50 years in which the occurrence of WTD is more frequent than that of DTW. The outcomes of the study will help mitigate and regulate the flood and drought in Poyang Lake basin, as well as in other regions.

ACS Style

Xianghu Li; Xuchun Ye. Spatiotemporal Characteristics of Dry-Wet Abrupt Transition Based on Precipitation in Poyang Lake Basin, China. Water 2015, 7, 1943 -1958.

AMA Style

Xianghu Li, Xuchun Ye. Spatiotemporal Characteristics of Dry-Wet Abrupt Transition Based on Precipitation in Poyang Lake Basin, China. Water. 2015; 7 (12):1943-1958.

Chicago/Turabian Style

Xianghu Li; Xuchun Ye. 2015. "Spatiotemporal Characteristics of Dry-Wet Abrupt Transition Based on Precipitation in Poyang Lake Basin, China." Water 7, no. 12: 1943-1958.

Journal article
Published: 24 November 2014 in Chinese Geographical Science
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The Poyang Lake is one of the most frequently flooded areas in China. Understanding the changing characteristics of floods as well as the affecting factors is an important prerequisite of flood disaster prevention and mitigation. The present study identified the characteristics variations of historical floods in the Poyang Lake and their tendencies based on the Mann-Kendall (M-K) test, and also investigated the related affecting factors, both from climate and human activities. The results revealed that the highest flood stages, duration as well as hazard coefficient of floods showed a long-term increasing linear trend during the last 60 years with the M-K statistic of 1.49, 1.60 and 1.50, respectively. And, a slightly increasing linear trend in the timing of the highest stages indicated the floods occurred later and later during the last six decades. The rainfall during the flood season and subsequent discharges of the Changjiang (Yangtze) River and runoff from the Poyang Lake Basin were mainly responsible for the severe flood situation in the Poyang Lake in the 1990s. In addition, the intensive human activities, including land reclamation and levee construction, also played a supplementary role in increasing severity of major floods. While, the fewer floods in the Poyang Lake after 2000 can be attributed to not only the less rainfall over the Poyang Lake Basin and low discharges of the Changjiang River during flood periods, but also the stronger influences of human activity which increased the floodwater storage of the Poyang Lake than before.

ACS Style

Xianghu Li; Qi Zhang. Variation of floods characteristics and their responses to climate and human activities in Poyang Lake, China. Chinese Geographical Science 2014, 25, 13 -25.

AMA Style

Xianghu Li, Qi Zhang. Variation of floods characteristics and their responses to climate and human activities in Poyang Lake, China. Chinese Geographical Science. 2014; 25 (1):13-25.

Chicago/Turabian Style

Xianghu Li; Qi Zhang. 2014. "Variation of floods characteristics and their responses to climate and human activities in Poyang Lake, China." Chinese Geographical Science 25, no. 1: 13-25.

Journal article
Published: 10 November 2014 in Water International
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ACS Style

Xuchun Ye; Yunliang Li; Xianghu Li; Qi Zhang. Factors influencing water level changes in China’s largest freshwater lake, Poyang Lake, in the past 50 years. Water International 2014, 39, 983 -999.

AMA Style

Xuchun Ye, Yunliang Li, Xianghu Li, Qi Zhang. Factors influencing water level changes in China’s largest freshwater lake, Poyang Lake, in the past 50 years. Water International. 2014; 39 (7):983-999.

Chicago/Turabian Style

Xuchun Ye; Yunliang Li; Xianghu Li; Qi Zhang. 2014. "Factors influencing water level changes in China’s largest freshwater lake, Poyang Lake, in the past 50 years." Water International 39, no. 7: 983-999.

Original paper
Published: 09 November 2014 in Natural Hazards
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Poyang Lake, directly connected with the Yangtze River, is one of the most frequently flooded areas in China. The frequent large floods have caused huge damages to the environment and economy and threatened the life of approximately 10 million people. Understanding the changing characteristics of floods as well as the affecting factors is an important prerequisite of flood disaster prevention and mitigation. In this study, the characteristics of historical floods in Poyang Lake were identified and examined based on several widely used indices and Mann–Kendall test. The study also analyzed the related driving forces and discussed their relationships with Poyang Lake floods. The results show that the floods in Poyang Lake mainly occurred in mid- and late July. The inter-annual variation of highest flood stages and duration showed a long-term increasing linear trend. Also, a slightly increasing linear trend in the timing of highest stages indicated the floods have occurred later and later during the last 60 years. At the decadal scale, the flood situations were most severe in 1990s while gentle in 2000s in terms of the occurrence frequency and average duration. The climate change was the primary influence factor for changing of flood characteristics in Poyang Lake; i.e., the abnormally large rainfall during the flood season and subsequent large discharges of Yangtze River and runoff inflow from the basin were mainly responsible for the severe floods in 1990s. Also, the smallest storage capacity of Poyang Lake in 1990s due to the intensive human activities such as the great floodplain occupancy and levee construction further increased the severity of floods. While the rare floods in 2000s can be attributed to, on the one hand, the decrease in rainfall over the middle reaches of Yangtze River which caused the low streamflows of Yangtze River and runoff inflow from the Poyang Lake basin. On the other hand, the “return land to lake” policy, intensive sand mining in the lake and the flood control of Three Gorges Dam also played an important role in mitigation of flood frequency and severity.

ACS Style

Xianghu Li; Qi Zhang; Chong-Yu Xu; Xuchun Ye. The changing patterns of floods in Poyang Lake, China: characteristics and explanations. Natural Hazards 2014, 76, 651 -666.

AMA Style

Xianghu Li, Qi Zhang, Chong-Yu Xu, Xuchun Ye. The changing patterns of floods in Poyang Lake, China: characteristics and explanations. Natural Hazards. 2014; 76 (1):651-666.

Chicago/Turabian Style

Xianghu Li; Qi Zhang; Chong-Yu Xu; Xuchun Ye. 2014. "The changing patterns of floods in Poyang Lake, China: characteristics and explanations." Natural Hazards 76, no. 1: 651-666.

Journal article
Published: 01 June 2014 in Journal of Hydrology
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Changes in lake hydrological regimes and the associated impacts on water supplies and ecosystems are internationally recognized issues. During the past decade, the persistent dryness of Poyang Lake (the largest freshwater lake in China) has caused water supply and irrigation crises for the 12.4 million inhabitants of the region. There is conjecture as to whether this dryness is caused by climate variability and/or human activities. This study examines long-term datasets of catchment inflow and Lake outflow, and employs a physically-based hydrodynamic model to explore catchment and Yangtze River controls on the Lake’s hydrology. Lake water levels fell to their lowest during 2001–2010 relative to previous decades. The average Lake size and volume reduced by 154 km2 and 11 × 108 m3 during the same period, compared to those for the preceding period (1970–2000). Model simulations demonstrated that the drainage effect of the Yangtze River was the primary causal factor. Modeling also revealed that, compared to climate variability impacts on the Lake catchment, modifications to Yangtze River flows from the Three Gorges Dam have had a much greater impact on the seasonal (September–October) dryness of the Lake. Yangtze River effects are attenuated in the Lake with distance from the River, but nonetheless propagate some 100 km to the Lake’s upstream limit. Proposals to build additional dams in the upper Yangtze River and its tributaries are expected to impose significant challenges for the management of Poyang Lake. Hydraulic engineering to modify the flow regime between the Lake and the Yangtze River would somewhat resolve the seasonal dryness of the Lake, but will likely introduce other issues in terms of water quality and aquatic ecosystem health, requiring considerable further research.

ACS Style

Qi Zhang; Xu-Chun Ye; Adrian Werner; Yun-Liang Li; Jing Yao; Xianghu Li; Chong-Yu Xu. An investigation of enhanced recessions in Poyang Lake: Comparison of Yangtze River and local catchment impacts. Journal of Hydrology 2014, 517, 425 -434.

AMA Style

Qi Zhang, Xu-Chun Ye, Adrian Werner, Yun-Liang Li, Jing Yao, Xianghu Li, Chong-Yu Xu. An investigation of enhanced recessions in Poyang Lake: Comparison of Yangtze River and local catchment impacts. Journal of Hydrology. 2014; 517 ():425-434.

Chicago/Turabian Style

Qi Zhang; Xu-Chun Ye; Adrian Werner; Yun-Liang Li; Jing Yao; Xianghu Li; Chong-Yu Xu. 2014. "An investigation of enhanced recessions in Poyang Lake: Comparison of Yangtze River and local catchment impacts." Journal of Hydrology 517, no. : 425-434.

Journal article
Published: 01 March 2014 in Journal of Hydrologic Engineering
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In this paper, a distributed catchment-hydrology model and a physically based lake hydrodynamic model were used to simulate the large-scale and highly dynamic lake catchment system of Poyang Lake, in the middle reach of the Yangtze River basin, China. The simulation of the hydrodynamics of the lake is a significant extension to previous efforts to simulate Poyang Lake’s considerable variability in lake extent and flow rates. Further, the combination of the distributed catchment-hydrology model and the lake-hydrodynamic model, applied to a highly dynamic and large-scale system, is a rare attempt to develop a physically based management model of this complexity and scale. Model calibration and validation were undertaken to evaluate the model’s performance and to enhance its effectiveness in simulating catchment discharges, lake water levels, lake water surface areas, and lake flow patterns. The results showed a satisfactory agreement with field observations, with Nash-Sutcliffe efficiencies of 0.71–0.84 for catchment discharges, 0.88–0.98 for lake water levels, and 0.80 for lake outflows during the calibration period. The Nash-Sutcliffe efficiency values for the validation period, ranging from 0.62 to 0.97, were largely consistent with the calibration values. Further investigation of the results showed that the modeling approach simulated adequately the lake hydrodynamics in terms of the flow fields within the lake and the seasonal changes in the lake water surface area. The outcomes of this paper will benefit future modeling efforts by providing a tool for predicting the hydrology of Poyang Lake and its catchment under climate variability and land-use changes.

ACS Style

Yunliang Li; Qi Zhang; Jing Yao; Adrian D. Werner; Xianghu Li. Hydrodynamic and Hydrological Modeling of the Poyang Lake Catchment System in China. Journal of Hydrologic Engineering 2014, 19, 607 -616.

AMA Style

Yunliang Li, Qi Zhang, Jing Yao, Adrian D. Werner, Xianghu Li. Hydrodynamic and Hydrological Modeling of the Poyang Lake Catchment System in China. Journal of Hydrologic Engineering. 2014; 19 (3):607-616.

Chicago/Turabian Style

Yunliang Li; Qi Zhang; Jing Yao; Adrian D. Werner; Xianghu Li. 2014. "Hydrodynamic and Hydrological Modeling of the Poyang Lake Catchment System in China." Journal of Hydrologic Engineering 19, no. 3: 607-616.

Original paper
Published: 22 February 2014 in Meteorology and Atmospheric Physics
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Water resources in the Yangtze River, the longest river in China, are of great importance for the water security of China. In this study, 146 years (1865–2010) of streamflow data were used to investigate the changes in streamflow of the Yangtze River. The Mann-Kendall test and wavelet coherence analysis were used to test the change points in annual streamflow. The streamflow data, combined with the meteorological dataset of the Climatic Research Unit (CRU) from 1901 to 2010, showed that the Yangtze River streamflow changes occurred in four major periods over the past century: 1901–1930, 1931–1960, 1961–1990, and 1991–2010. The average annual streamflow for the four periods was 497.26, 499.11, 476.25, and 471.93 mm, respectively. The period from 1901 to 1930 was considered the baseline period for estimating the streamflow changes during the other three periods. We found that the streamflow increase during 1931–1960 was mainly influenced by climatic variation, while the streamflow decrease during 1961–1990 was mainly attributed to human activities because of tremendous population growth and rapid economic development. During the period 1991–2010, both climatic variation and human activities led to a decrease in streamflow, and human activities were still the main driving factor for the streamflow decrease. However, the contribution proportion of human activities to the streamflow decrease during 1991–2010 was much smaller than that during 1961–1990. The estimation results indicated that human activities have become the dominant driving factors of the streamflow changes in the Yangtze River Basin since 1961. Human activities, such as booming socio-economic development and fast population growth, have brought new challenges for water resources management in the Yangtze River Basin.

ACS Style

Dan Zhang; Haoyuan Hong; Qi Zhang; Xianghu Li. Attribution of the changes in annual streamflow in the Yangtze River Basin over the past 146 years. Meteorology and Atmospheric Physics 2014, 119, 323 -332.

AMA Style

Dan Zhang, Haoyuan Hong, Qi Zhang, Xianghu Li. Attribution of the changes in annual streamflow in the Yangtze River Basin over the past 146 years. Meteorology and Atmospheric Physics. 2014; 119 (1-2):323-332.

Chicago/Turabian Style

Dan Zhang; Haoyuan Hong; Qi Zhang; Xianghu Li. 2014. "Attribution of the changes in annual streamflow in the Yangtze River Basin over the past 146 years." Meteorology and Atmospheric Physics 119, no. 1-2: 323-332.

Research article
Published: 22 December 2013 in Advances in Meteorology
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Poyang Lake basin is one of the most frequently affected areas by a variety of flood or drought events in China. Satellite-based precipitation data have greatly improved their temporal and spatial resolution in recent years, but the short length of records limited their applications in some fields. This paper compared and evaluated the creditability of using a short period data series to estimate the statistics characteristics of long period data series and investigated the usefulness of TRMM rainfall data for monitoring the temporal and spatial distribution of flood/drought classes by theZindex method in Poyang Lake basin. The results show that (1) the 1998–2010 data series are sufficiently robust to depict the statistics characteristics of long period data; (2) the intra-annual distribution and interannual variability of flood/drought classes based on TRMM rainfall data matched well with the results from rain gauges data; (3) the spatial agreement between TRMM and interpolated gauges rainfall varied with the precipitation characteristics; and (4) TRMM rainfall data described the similar spatial pattern of flood/drought classes with the interpolated gauges rainfall. In conclusion, it is suitable and credible for flood/drought classes evaluation based on the TRMM rainfall data in Poyang Lake basin.

ACS Style

Xianghu Li; Qi Zhang; Xuchun Ye. Capabilities of Satellite-Based Precipitation to Estimate the Spatiotemporal Variation of Flood/Drought Class in Poyang Lake Basin. Advances in Meteorology 2013, 2013, 1 -9.

AMA Style

Xianghu Li, Qi Zhang, Xuchun Ye. Capabilities of Satellite-Based Precipitation to Estimate the Spatiotemporal Variation of Flood/Drought Class in Poyang Lake Basin. Advances in Meteorology. 2013; 2013 (4):1-9.

Chicago/Turabian Style

Xianghu Li; Qi Zhang; Xuchun Ye. 2013. "Capabilities of Satellite-Based Precipitation to Estimate the Spatiotemporal Variation of Flood/Drought Class in Poyang Lake Basin." Advances in Meteorology 2013, no. 4: 1-9.

Journal article
Published: 19 November 2013 in Water
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Local dry/wet conditions are of great concern in regional water resource and floods/droughts disaster risk management. Satellite-based precipitation products have greatly improved their accuracy and applicability and are expected to offer an alternative to ground rain gauges data. This paper investigated the capability of Tropical Rainfall Measuring Mission (TRMM) rainfall data for monitoring the temporal and spatial variation of dry/wet conditions in Poyang Lake basin during 1998–2010, and validated its reliability with rain gauges data from 14 national meteorological stations in the basin. The results show that: (1) the daily TRMM rainfall data does not describe the occurrence and contribution rates of precipitation accurately, but monthly TRMM data have a good linear relationship with rain gauges rainfall data; (2) both the Z index and Standardized Precipitation Index (SPI) based on monthly TRMM rainfall data oscillate around zero and show a consistent interannual variability as compared with rain gauges data; (3) the spatial pattern of moisture status, either in dry months or wet months, based on both the Z index and SPI using TRMM data, agree with the observed rainfall. In conclusion, the monthly TRMM rainfall data can be used for monitoring the variation and spatial distribution of dry/wet conditions in Poyang Lake basin.

ACS Style

Xianghu Li; Qi Zhang; Xuchun Ye. Dry/Wet Conditions Monitoring Based on TRMM Rainfall Data and Its Reliability Validation over Poyang Lake Basin, China. Water 2013, 5, 1848 -1864.

AMA Style

Xianghu Li, Qi Zhang, Xuchun Ye. Dry/Wet Conditions Monitoring Based on TRMM Rainfall Data and Its Reliability Validation over Poyang Lake Basin, China. Water. 2013; 5 (4):1848-1864.

Chicago/Turabian Style

Xianghu Li; Qi Zhang; Xuchun Ye. 2013. "Dry/Wet Conditions Monitoring Based on TRMM Rainfall Data and Its Reliability Validation over Poyang Lake Basin, China." Water 5, no. 4: 1848-1864.

Research article
Published: 18 November 2013 in Hydrological Processes
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By using linear regression (parametric), Mann–Kendall (nonparametric) and attribution analysis methods, this study systematically analysed the changing properties of reference evapotranspiration (ETr) calculated using the Penman–Monteith method over the Poyang Lake catchment during 1960–2008 and investigated the contribution of major climatic variables to ETr changes and their temporal evolution. Generally, a significant decreasing trend of annual ETr is found in the catchment. The decrease of annual ETr in the Poyang Lake basin is mostly affected by the decline of summer ETr. Over the study period, climatic variables, i.e. sunshine duration (SD), relative humidity (RH), wind speed (WS) and vapour pressure all showed decreasing trends, whereas mean daily temperature (DT) increased significantly. Multivariate regression analysis indicated that SD is the most sensitive climatic variable to the variability of ETr on annual basis, followed by RH, WS and DT, whereas the effect of vapour pressure is obscure. Although recent warming trend and decrease of relative humidity over the catchment could have increased ETr, the combined effect of shortened SD and reduced WS negated the effect and caused significant decrease of ETr. Our investigation reveals that the relative contributions of climatic variables to ETr are temporally unstable and vary considerably with large fluctuation. In consideration of the changes of climatic variables over time, further analysis indicated that changes of mean annual ETr in 1970–2008 were primarily affected by SD followed by WS, RH and DT with reference to 1960s. However, WS became the predominant factor during the period 2000–2008 compared with reference period 1960s, and followed by SD. Copyright © 2013 John Wiley & Sons, Ltd.

ACS Style

Xuchun Ye; Xianghu Li; Jian Liu; Chong-Yu Xu; Qi Zhang. Variation of reference evapotranspiration and its contributing climatic factors in the Poyang Lake catchment, China. Hydrological Processes 2013, 28, 6151 -6162.

AMA Style

Xuchun Ye, Xianghu Li, Jian Liu, Chong-Yu Xu, Qi Zhang. Variation of reference evapotranspiration and its contributing climatic factors in the Poyang Lake catchment, China. Hydrological Processes. 2013; 28 (25):6151-6162.

Chicago/Turabian Style

Xuchun Ye; Xianghu Li; Jian Liu; Chong-Yu Xu; Qi Zhang. 2013. "Variation of reference evapotranspiration and its contributing climatic factors in the Poyang Lake catchment, China." Hydrological Processes 28, no. 25: 6151-6162.