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Yongqin David Chen
School of Humanities and Social Science, The Chinese University of Hong Kong, Shenzhen

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Journal article
Published: 15 June 2020 in Proceedings of the National Academy of Sciences
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The total amount of rainfall associated with tropical cyclones (TCs) over a given region is proportional to rainfall intensity and the inverse of TC translation speed. Although the contributions of increase in rainfall intensity to larger total rainfall amounts have been extensively examined, observational evidence on impacts of the recently reported but still debated long-term slowdown of TCs on local total rainfall amounts is limited. Here, we find that both observations and the multimodel ensemble of Global Climate Model simulations show a significant slowdown of TCs (11% in observations and 10% in simulations, respectively) from 1961 to 2017 over the coast of China. Our analyses of long-term observations find a significant increase in the 90th percentile of TC-induced local rainfall totals and significant inverse relationships between TC translation speeds and local rainfall totals over the study period. The study also shows that TCs with lower translation speed and higher rainfall totals occurred more frequently after 1990 in the Pearl River Delta in southern China. Our probability analysis indicates that slow-moving TCs are more likely to generate heavy rainfall of higher total amounts than fast-moving TCs. Our findings suggest that slowdown of TCs tends to elevate local rainfall totals and thus impose greater flood risks at the regional scale.

ACS Style

Yangchen Lai; Jianfeng Li; Xihui Gu; Yongqin David Chen; Dongdong Kong; Thian Yew Gan; Maofeng Liu; Qingquan Li; Guofeng Wu. Greater flood risks in response to slowdown of tropical cyclones over the coast of China. Proceedings of the National Academy of Sciences 2020, 117, 14751 -14755.

AMA Style

Yangchen Lai, Jianfeng Li, Xihui Gu, Yongqin David Chen, Dongdong Kong, Thian Yew Gan, Maofeng Liu, Qingquan Li, Guofeng Wu. Greater flood risks in response to slowdown of tropical cyclones over the coast of China. Proceedings of the National Academy of Sciences. 2020; 117 (26):14751-14755.

Chicago/Turabian Style

Yangchen Lai; Jianfeng Li; Xihui Gu; Yongqin David Chen; Dongdong Kong; Thian Yew Gan; Maofeng Liu; Qingquan Li; Guofeng Wu. 2020. "Greater flood risks in response to slowdown of tropical cyclones over the coast of China." Proceedings of the National Academy of Sciences 117, no. 26: 14751-14755.

Journal article
Published: 18 September 2019 in Resources, Conservation and Recycling
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The energy industry in China is responsible for the largest water withdrawal and consumption in the secondary industry. In addition to the large quantities, another important feature of energy-water use in China is a critical spatial mismatch between water consumption and water availability. We used a multiregional input-output model to investigate virtual water of the energy industry in the Chinese provinces, and to determine virtual water flows embedded in energy-related trade among the provinces. The domestic interprovincial trade of energy in China has caused virtual water being used outside of the energy production province, including 8.6% of the virtual water withdrawal and 15.6% of the virtual water consumption. The results demonstrate there are a general north-to-south flow and a west-to-east flow of virtual energy-water within China. This flowing pattern indicates the energy consumption in the more-developed provinces, such as Beijing, Tianjin, Shanghai, Jiangsu, Zhejiang, and Guangdong, are supported by water use from the less-developed provinces where water scarcity is severe. Particularly, Shanxi and Inner Mongolia are two major exporters of virtual energy-water because more than half of the water resources in these two provinces outflow mainly to the north region, imposing huge pressure on the scarce domestic water resources in these two provinces. This study has proved the great importance of and also provided an approach to integrating water-energy nexus into energy industry planning and management in China.

ACS Style

Lu Lin; Yongqin David Chen; Dong Hua; Yi Liu; Mengyao Yan. Provincial virtual energy-water use and its flows within China: A multiregional input-output approach. Resources, Conservation and Recycling 2019, 151, 104486 .

AMA Style

Lu Lin, Yongqin David Chen, Dong Hua, Yi Liu, Mengyao Yan. Provincial virtual energy-water use and its flows within China: A multiregional input-output approach. Resources, Conservation and Recycling. 2019; 151 ():104486.

Chicago/Turabian Style

Lu Lin; Yongqin David Chen; Dong Hua; Yi Liu; Mengyao Yan. 2019. "Provincial virtual energy-water use and its flows within China: A multiregional input-output approach." Resources, Conservation and Recycling 151, no. : 104486.

Journal article
Published: 02 August 2019 in Water
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The river chief system (RCS) has been innovatively implemented in Wuxi, China since 2007 for the eutrophication control of Tai Lake. In 2016, RCS was eventually promoted throughout China to reinforce river and lake protection. The success of this new river management system is generally attributed to collaboration, accountability, and differentiation effects. This research takes Foshan in the Pearl River Delta region as a case study to examine the feasibility and weaknesses in the implementation of the RCS. Prior to the formal adoption of RCS, a coordinating organization for river improvement undertaking was established in Foshan to overcome fragmentation in water management. Compared with this practice, the new RCS can strengthen the collaboration of administrative authorities and establish a considerably sophisticated and effective management structure. Emphasis on evaluation and accountability mechanisms guarantees that management goals can be achieved. However, similar to the previous one, the new system remains a temporary management practice and its outcomes depend partially on the commitment and capability of each river chief. The imperfect evaluation and accountability mechanism also weaken its long-term effectiveness in improving river water quality. Therefore, some corresponding policy instruments are needed to ensure that RCS can be implemented smoothly.

ACS Style

Hui Liu; Yongqin David Chen; Tao Liu; Lu Lin. The River Chief System and River Pollution Control in China: A Case Study of Foshan. Water 2019, 11, 1606 .

AMA Style

Hui Liu, Yongqin David Chen, Tao Liu, Lu Lin. The River Chief System and River Pollution Control in China: A Case Study of Foshan. Water. 2019; 11 (8):1606.

Chicago/Turabian Style

Hui Liu; Yongqin David Chen; Tao Liu; Lu Lin. 2019. "The River Chief System and River Pollution Control in China: A Case Study of Foshan." Water 11, no. 8: 1606.

Letter
Published: 01 January 2018 in Nature Climate Change
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Changes in air temperature (AT), humidity and wind speed (Wind) affect apparent temperature (AP), the human-perceived equivalent temperature1,2,3. Here we show that under climate warming, both reanalysis data sets and Global Climate Model simulations indicate that AP has increased faster than AT over land. The faster increase in AP has been especially significant over low latitudes and is expected to continue in the future. The global land average AP increased at 0.04 °C per decade faster than AT before 2005. This trend is projected to increase to 0.06 °C (0.03–0.09 °C; minimum and maximum of the ensemble members) per decade and 0.17 °C (0.12–0.25 °C) per decade under the Representative Concentration Pathway 4.5 scenario (RCP4.5) and RCP8.5, respectively, and reduce to 0.02 °C (0–0.03 °C) per decade under RCP2.6 over 2006–2100. The higher increment in AP in summer daytime is more remarkable than in winter night-time and is most prominent over low latitudes. The summertime increases in AT-based thermal discomfort are projected to balance the wintertime decreases in AT-based discomfort over low and middle latitudes, while the summertime increases in AP-based thermal discomfort are expected to outpace the wintertime decreases in AP-based thermal discomfort. Effective climate change mitigation efforts to achieve RCP2.6 can considerably alleviate the faster increase in AP.

ACS Style

Jianfeng Li; Yongqin David Chen; Thian Yew Gan; Ngar-Cheung Lau. Elevated increases in human-perceived temperature under climate warming. Nature Climate Change 2018, 8, 43 -47.

AMA Style

Jianfeng Li, Yongqin David Chen, Thian Yew Gan, Ngar-Cheung Lau. Elevated increases in human-perceived temperature under climate warming. Nature Climate Change. 2018; 8 (1):43-47.

Chicago/Turabian Style

Jianfeng Li; Yongqin David Chen; Thian Yew Gan; Ngar-Cheung Lau. 2018. "Elevated increases in human-perceived temperature under climate warming." Nature Climate Change 8, no. 1: 43-47.

Journal article
Published: 23 December 2017 in Sustainability
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Water scarcity and uneven water demand in regional electricity generation pose substantial challenges to the sustainable development of water resources and electricity production in China. Based on the latest official policy of China’s electricity development, i.e., the 13th Five-Year Plan of electricity development, this study quantified annual water withdrawal and consumption for future electricity generation in China from 2015 to 2030. This study simulated a three-prong approach to impacting water use for electricity development, i.e., updating the cooling technology mix, increasing non-thermal power generation and relocating thermal power plants to the west. The results showed that solutions to relieve water stress caused by electricity production entail major trade-offs. Annual water withdrawal and consumption were projected to exceed 63.75 and 8.30 billion m3 by 2030, up approximately 14% and 21% of those in 2015, respectively, if China does not implement any new water and energy policies. Replacing once-through cooling systems with closed-loop cooling systems would decrease national water withdrawal remarkably but increase water consumption. The west-centered spatial distribution of thermoelectric power generation would reduce water use at the national level; however, it will largely increase water stress in northern and northwestern China. Thus, relieving the stress of growing electricity demand on water resources in China requires comprehensive measures and quantitative estimates.

ACS Style

Lu Lin; Yongqin David Chen. Evaluation of Future Water Use for Electricity Generation under Different Energy Development Scenarios in China. Sustainability 2017, 10, 30 .

AMA Style

Lu Lin, Yongqin David Chen. Evaluation of Future Water Use for Electricity Generation under Different Energy Development Scenarios in China. Sustainability. 2017; 10 (2):30.

Chicago/Turabian Style

Lu Lin; Yongqin David Chen. 2017. "Evaluation of Future Water Use for Electricity Generation under Different Energy Development Scenarios in China." Sustainability 10, no. 2: 30.

Preprint content
Published: 14 July 2017 in Hydrology and Earth System Sciences Discussions
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Precipitation extremes are localized and spatially heterogeneous events. Magnitude of precipitation extreme p is expected to be spatial resolution dependent. Heavy precipitation extremes tend to be less intensive at coarser resolutions due to the averaging effect of the neighbouring less extreme events. Given the resolution dependent p, this study aims to investigate how spatial resolutions affect projected changes in precipitation extremes between future and historical periods, i.e. pfut − phis, which is a commonly used metric in climate projections. Our results show that although p is sensitive to spatial resolutions, differences in pfut − phis among various spatial resolutions are relatively small. Assessments of performances of GCMs in simulating p and pfut − phis are conducted based on three commonly used strategies that account for differences in spatial resolutions between GCMs and observations, i.e. the site-scale, the grid-scale, and the grid-point (i.e. direct comparison of grid-against scale-extremes) comparisons. Performances of GCMs in the site-scale comparison outperform those in the grid-scale and grid-point comparisons, because the statistical downscaling method incorporates the site-scale information to the future values when downscaling the GCMs. Assessment results of the grid-point comparison are comparable to those of the grid-scale comparison, even though the former has been criticized for not accounting for the difference in spatial resolutions between GCMs and observations. The spatial distributions of pfut − phis under RCP8.5 show that their differences between the site scale and the GCMs’ original resolutions are marginal. Given the considerable discrepancies among GCM outputs, the effects of spatial resolutions on projected changes are negligible.

ACS Style

Jianfeng Li; Thian Yew Gan; Yongqin David Chen; Qiang Zhang; Zengyun Hu; Xihui Gu. Impacts of spatial resolutions on projected changes in precipitation extremes: from site- to grid-scales. Hydrology and Earth System Sciences Discussions 2017, 1 -34.

AMA Style

Jianfeng Li, Thian Yew Gan, Yongqin David Chen, Qiang Zhang, Zengyun Hu, Xihui Gu. Impacts of spatial resolutions on projected changes in precipitation extremes: from site- to grid-scales. Hydrology and Earth System Sciences Discussions. 2017; ():1-34.

Chicago/Turabian Style

Jianfeng Li; Thian Yew Gan; Yongqin David Chen; Qiang Zhang; Zengyun Hu; Xihui Gu. 2017. "Impacts of spatial resolutions on projected changes in precipitation extremes: from site- to grid-scales." Hydrology and Earth System Sciences Discussions , no. : 1-34.

Journal article
Published: 01 February 2017 in Journal of Climate
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The response of moisture circulation to the daily evolution of the India–Burma Trough (IBT) and the modulation of disturbances along the South Asian waveguide are analyzed to seek a potential precursor of winter precipitation over south China. Daily observational precipitation and reanalysis data from ERA-Interim during 1979–2012 are employed. It is found that moisture circulation in response to the IBT is part of the zonally oriented wave trains along the South Asian waveguide, but it persists longer and migrates farther eastward than other lobes. Cyclonic moisture transport enhances the moisture supply to south China as a strong IBT develops, and shifts eastward abruptly after the peak of IBT with enhanced precipitation shifting from southwest to southeast China. This response is a joint effect of synoptic, intraseasonal, and interannual components that show similar wave train structures, whereas slight differences still occur. The synoptic component shows a shorter wavelength, more southerly path, faster phase speed, and group velocity, with the signal from the North Atlantic to the Bay of Bengal (BoB) in 6 days, implying that a disturbance over the North Atlantic is a potential precursor of winter precipitation over south China. The synoptic moisture convergence is more intensive than that at other scales upstream except over Southeast Asia, where all components are comparable. This might result from the constrained moisture source from BoB at the synoptic scale because of a short wavelength, while widespread sources from BoB–western North Pacific (WNP) at other scales as wavelengths are longer.

ACS Style

Xiuzhen Li; Yongqin David Chen; Wen Zhou. Response of Winter Moisture Circulation to the India–Burma Trough and Its Modulation by the South Asian Waveguide. Journal of Climate 2017, 30, 1197 -1210.

AMA Style

Xiuzhen Li, Yongqin David Chen, Wen Zhou. Response of Winter Moisture Circulation to the India–Burma Trough and Its Modulation by the South Asian Waveguide. Journal of Climate. 2017; 30 (4):1197-1210.

Chicago/Turabian Style

Xiuzhen Li; Yongqin David Chen; Wen Zhou. 2017. "Response of Winter Moisture Circulation to the India–Burma Trough and Its Modulation by the South Asian Waveguide." Journal of Climate 30, no. 4: 1197-1210.

Journal article
Published: 01 April 2016 in Journal of Hydrometeorology
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Future changes in floods and water availability across China under representative concentration pathway 2.6 (RCP2.6) and RCP8.5 are studied by analyzing discharge simulations from the Inter-Sectoral Impact Model Intercomparison Project (ISI-MIP) with the consideration of uncertainties among global climate models (GCMs) and hydrologic models. Floods and water availability derived from ISI-MIP simulations are compared against observations. The uncertainties among models are quantified by model agreement. Only model agreement >50% is considered to generate reliable projections of floods and water availability and their relationships with climate change. The results show five major points. First, ISI-MIP simulations have acceptable ability in modeling floods and water availability. The spatial patterns of changes in floods and water availability highly depend on the outputs of GCMs. Uncertainties from GCMs/hydrologic models predominate the uncertainties in the wet/dry areas in eastern/northwestern China. Second, the magnitudes of floods throughout China increase during 2070–99 under RCP8.5 relative to those with the same return periods during 1971–2000. The increase rates of larger floods are higher than those of the smaller ones. Third, water availability decreases/increases in southern/northern China under RCP8.5, but changes negligibly under RCP2.6. Fourth, more severe floods in the future are driven by more intense precipitation extremes over China. The negligible change in mean precipitation and the increase in actual evapotranspiration reduce the water availability in southern China. Fifth, model agreements are higher in simulated floods than water availability because increasing precipitation extremes are more consistent among different GCM outputs compared to mean precipitation.

ACS Style

Jianfeng Li; Yongqin David Chen; Lu Zhang; Qiang Zhang; Francis H. S. Chiew. Future Changes in Floods and Water Availability across China: Linkage with Changing Climate and Uncertainties. Journal of Hydrometeorology 2016, 17, 1295 -1314.

AMA Style

Jianfeng Li, Yongqin David Chen, Lu Zhang, Qiang Zhang, Francis H. S. Chiew. Future Changes in Floods and Water Availability across China: Linkage with Changing Climate and Uncertainties. Journal of Hydrometeorology. 2016; 17 (4):1295-1314.

Chicago/Turabian Style

Jianfeng Li; Yongqin David Chen; Lu Zhang; Qiang Zhang; Francis H. S. Chiew. 2016. "Future Changes in Floods and Water Availability across China: Linkage with Changing Climate and Uncertainties." Journal of Hydrometeorology 17, no. 4: 1295-1314.

Journal article
Published: 01 March 2014 in Global and Planetary Change
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ACS Style

Qiang Zhang; Juntai Peng; Vijay P. Singh; Jianfeng Li; Yongqin David Chen. Spatio-temporal variations of precipitation in arid and semiarid regions of China: The Yellow River basin as a case study. Global and Planetary Change 2014, 114, 38 -49.

AMA Style

Qiang Zhang, Juntai Peng, Vijay P. Singh, Jianfeng Li, Yongqin David Chen. Spatio-temporal variations of precipitation in arid and semiarid regions of China: The Yellow River basin as a case study. Global and Planetary Change. 2014; 114 ():38-49.

Chicago/Turabian Style

Qiang Zhang; Juntai Peng; Vijay P. Singh; Jianfeng Li; Yongqin David Chen. 2014. "Spatio-temporal variations of precipitation in arid and semiarid regions of China: The Yellow River basin as a case study." Global and Planetary Change 114, no. : 38-49.

Journal article
Published: 01 July 2011 in Journal of Hydrologic Engineering
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It is believed that the currently increasing temperature, also known as global warming, has altered the hydrological cycle and thus the hydrometeorological extremes become frequent. In this study, the authors analyze hydrological extremes defined by 7-day high flow and low flow of the Pearl River Basin by using a copula family. The results indicate that the concurrent occurrence of extreme high and low flow is of small probability. It implies that the probability is small that the lower Pearl River Basin is attacked by heavy droughts or floods because of the combined effects of high or low flow of the two major tributaries of the Pearl River, i.e., the West and North Rivers. Therefore, the authors can conclude that the joint probability of hydrological extremes of two tributaries of a river basin could be small, albeit the occurrence of hydrological extremes of an individual river is of large probability. Besides, the results of this study also reveal increasing 7-day low flow in winter, which should be because of seasonal shifts of precipitation on the basis of the previous studies. The results of this study mean much for the sound human understanding of statistical behaviors of hydrological extremes in humid regions, and also for effective water resource management and development of human mitigation to the natural hazards in the changing environment.

ACS Style

Qiang Zhang; Yongqin David Chen; Xiaohong Chen; Jianfeng Li. Copula-Based Analysis of Hydrological Extremes and Implications of Hydrological Behaviors in the Pearl River Basin, China. Journal of Hydrologic Engineering 2011, 16, 598 -607.

AMA Style

Qiang Zhang, Yongqin David Chen, Xiaohong Chen, Jianfeng Li. Copula-Based Analysis of Hydrological Extremes and Implications of Hydrological Behaviors in the Pearl River Basin, China. Journal of Hydrologic Engineering. 2011; 16 (7):598-607.

Chicago/Turabian Style

Qiang Zhang; Yongqin David Chen; Xiaohong Chen; Jianfeng Li. 2011. "Copula-Based Analysis of Hydrological Extremes and Implications of Hydrological Behaviors in the Pearl River Basin, China." Journal of Hydrologic Engineering 16, no. 7: 598-607.

Journal article
Published: 01 August 2007 in Journal of Hydrometeorology
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To analyze the water budget under human influences in the Huaihe River plain region in China, the authors have developed a numerical modeling system that integrates water flux algorithms into a platform created by coupling a soil moisture model with the modular three-dimensional finite-difference groundwater flow model (MODFLOW). The modeling system is largely based on physical laws and employs a numerical method of the finite difference to simulate water movement and fluxes in a horizontally discretized watershed or field. The majority of model parameters carry physical significance and can be determined by field and laboratory measurements or derived from watershed characteristics contained in GIS and remote sensing data. Several other empirical parameters need to be estimated by model calibration. The numerical modeling system is calibrated in the Linhuanji catchment (2 560 km2) to estimate surface runoff, groundwater recharge, and groundwater loss for evapotranspiration and stream baseflow. Model validation is conducted at a small runoff experimental field (1.36 km2) in the Wuduogou Hydrological Experimental Station to test the model’s capability to simulate hydrological components and estimate water fluxes using observed stream stage and groundwater data, as well as lysimeter-measured precipitation recharge and groundwater loss. As proven by the promising results of model testing, this physically based and distributed-parameter model is a valuable contribution to the ever-advancing technology of hydrological modeling and water resources assessment.

ACS Style

Xi Chen; Yongqin David Chen; Zhicai Zhang. A Numerical Modeling System of the Hydrological Cycle for Estimation of Water Fluxes in the Huaihe River Plain Region, China. Journal of Hydrometeorology 2007, 8, 702 -714.

AMA Style

Xi Chen, Yongqin David Chen, Zhicai Zhang. A Numerical Modeling System of the Hydrological Cycle for Estimation of Water Fluxes in the Huaihe River Plain Region, China. Journal of Hydrometeorology. 2007; 8 (4):702-714.

Chicago/Turabian Style

Xi Chen; Yongqin David Chen; Zhicai Zhang. 2007. "A Numerical Modeling System of the Hydrological Cycle for Estimation of Water Fluxes in the Huaihe River Plain Region, China." Journal of Hydrometeorology 8, no. 4: 702-714.

Journal article
Published: 15 January 2007 in Hydrological Processes
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ACS Style

Xi Chen; Yongqin David Chen; Chong-Yu Xu. A distributed monthly hydrological model for integrating spatial variations of basin topography and rainfall. Hydrological Processes 2007, 21, 242 -252.

AMA Style

Xi Chen, Yongqin David Chen, Chong-Yu Xu. A distributed monthly hydrological model for integrating spatial variations of basin topography and rainfall. Hydrological Processes. 2007; 21 (2):242-252.

Chicago/Turabian Style

Xi Chen; Yongqin David Chen; Chong-Yu Xu. 2007. "A distributed monthly hydrological model for integrating spatial variations of basin topography and rainfall." Hydrological Processes 21, no. 2: 242-252.

Journal article
Published: 01 December 2006 in Hydrological Sciences Journal
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Dongjiang water has been the key source of water supplies for Hong Kong and its neighbouring cities in the Pearl River Delta in South China since the mid-1960s. Rapid economic development and population growth in this region have caused serious concerns over the adequacy of the quantity and quality of water withdrawn from the Dongjiang River in the future. Information on the magnitude and frequency of low flows in the basin is needed for planning of water resources at present and in the near future. The L-moment method is used to analyse the regional frequency of low flows, since recent studies have shown that it is superior to other methods that have been used previously, and is now being adopted by many organizations worldwide. In this study, basin-wide analysis of low flows is conducted for Dongjiang basin using five distributions: generalized logistic, generalized extreme value, lognormal, Pearson type III and generalized Pareto. Each of these has three parameters estimated by the L-moment method. The discordancy index and homogeneity testing show that 14 out of the 16 study sites belong to a homogenous region; these are used for further analysis. Based on the L-moment ratios diagram, the Hosking and Wallis goodness-of-fit statistical criterion and the L-kurtosis criterion, the three-parameter lognormal distribution is identified as the most appropriate distribution for the homogeneous study region. The regional low-flow estimates for each return period are obtained using the index flood procedure. Examination of the observed and simulated low flows by regional frequency analysis shows a good agreement in general, and the results may satisfy practical application. Furthermore, the regional low-flow relationship between mean annual 7-day low flows and basin area is developed using linear regression, providing a simple and effective method for estimation of low flows of desired return periods for ungauged catchments. L'eau du Fleuve Dongjiang est la principale ressource pour l'alimentation en eau de Hong Kong et de ses cités voisines du Delta de la Pearl River dans le Sud de la Chine, depuis le milieu des années 1960. Le développement économique rapide et la croissance démographique de la région ont causé de sérieux problèmes, pour le futur proche, en termes d'adéquation de la quantité et de la qualité des prélèvements d'eau dans le Fleuve Dongjiang. La méthode des L-moments est utilisée pour analyser la fréquence régionale des étiages, dans la mesure où de récentes études ont montré qu'elle est meilleure que d'autres méthodes utilisées précédemment et où elle est désormais adoptée par de nombreuses organisations de par le monde. Dans cette étude, une analyse des étiages est menée pour le bassin de Dongjiang, avec cinq distributions: logistique généralisée, valeurs extrêmes généralisée, lognormale, Pearson Type III et Pareto généralisée. Chacune de ces distributions a trois paramètres qui ont été estimés par la méthode des L-moments. L'indice de discordance et le test d'homogénéité montrent que 14 des 16 sites étudiés appartiennent à une région homogène; ils sont analysés plus en détail. Grâce au diagramme des rapports de L-moment, du critère statistique d'ajustement de Hosking and Wallis et du critère de L-aplatissement, la distribution lognormale à trois paramètres est identifiée comme étant la distribution la plus appropriée pour la région homogène étudiée. Les estimations d'étiage régionales pour chaque période de retour sont obtenues grâce à la procédure de l'indice de crue. L'examen par analyse fréquentielle régionale des étiages observés et simulés montre en général un bon ajustement, et les résultats peuvent permettre une application pratique. De plus, la relation régionale d'étiage établie par régression linéaire entre le plus faible débit sur 7 jours annuel moyen et la superficie du bassin versant fournit une méthode simple et efficace pour estimer les étiages de périodes de retour souhaitées et pour des bassins non jaugés.

ACS Style

Yongqin David Chen; Guoru Huang; Quanxi Shao; Chong-Yu Xu. Regional analysis of low flow using L-moments for Dongjiang basin, South China. Hydrological Sciences Journal 2006, 51, 1051 -1064.

AMA Style

Yongqin David Chen, Guoru Huang, Quanxi Shao, Chong-Yu Xu. Regional analysis of low flow using L-moments for Dongjiang basin, South China. Hydrological Sciences Journal. 2006; 51 (6):1051-1064.

Chicago/Turabian Style

Yongqin David Chen; Guoru Huang; Quanxi Shao; Chong-Yu Xu. 2006. "Regional analysis of low flow using L-moments for Dongjiang basin, South China." Hydrological Sciences Journal 51, no. 6: 1051-1064.

Original articles
Published: 01 December 2001 in Hydrological Sciences Journal
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ACS Style

Xia Jun; Yongqin David Chen. Water problems and opportunities in the hydrological sciences in China. Hydrological Sciences Journal 2001, 46, 907 -921.

AMA Style

Xia Jun, Yongqin David Chen. Water problems and opportunities in the hydrological sciences in China. Hydrological Sciences Journal. 2001; 46 (6):907-921.

Chicago/Turabian Style

Xia Jun; Yongqin David Chen. 2001. "Water problems and opportunities in the hydrological sciences in China." Hydrological Sciences Journal 46, no. 6: 907-921.