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Huang Heqing
Key Lab. of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

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Preprint content
Published: 04 March 2021
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Taking the width/depth ratio of an alluvial channel as an independent variable, a variational analysis of basic flow relationships shows that flow is able to achieve stationary equilibrium by adjusting channel geometry when the condition of maximum flow efficiency (MFE) is satisfied. To examine if this theory of self-adjusting channel morphodynamics can be practically applied to large river systems heavily loaded with sediment, this study examines the degree of correspondence between theoretically determined equilibrium channel geometries and actual measurements along the lower Yellow River. Using the Meyer-Peter and Müller bedload relation modified on the basis of MFE theory and relations of flow continuity and resistance we present a detailed investigation of the potential physical causes and main factors resulting in the correspondence. 

ACS Style

He Qing Huang; Min Zhang; Teng Su; Guoan Yu. Application of equilibrium theory on alluvial channel-form adjustment in a large river heavily loaded with sediment. 2021, 1 .

AMA Style

He Qing Huang, Min Zhang, Teng Su, Guoan Yu. Application of equilibrium theory on alluvial channel-form adjustment in a large river heavily loaded with sediment. . 2021; ():1.

Chicago/Turabian Style

He Qing Huang; Min Zhang; Teng Su; Guoan Yu. 2021. "Application of equilibrium theory on alluvial channel-form adjustment in a large river heavily loaded with sediment." , no. : 1.

Journal article
Published: 28 April 2020 in Water
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Riverbanks vary considerably in anti-scourability and consequently take various profiles. By using an isosceles trapezoid as the generalized form of river channel cross-sections and then incorporating the effects of bank angle into the variational analytical approach developed by Huang and Nanson (2000), this study presents a detailed theoretical investigation of the self-adjustment of alluvial channel forms. It is demonstrated that when alluvial channel flow achieves stable equilibrium, a significant decrease in riverbank steepness leads to a slight decrease in maximum sediment (bedload) discharge, and yet results in a significant increase in optimal channel width and a considerable decrease in optimal channel depth. The hydraulic geometry relations, theoretically derived for bank steepness to vary across a wide range, show that among the multivariant controls, the roles of bed sediment size, channel roughness, flow discharge and sediment (bedload) discharge are independent of bank steepness. While the effects of bank steepness illustrated in the theoretically derived hydraulic geometry relations are highly consistent with the results of threshold theory and previous empirical studies, limitations on using bank angle to reflect the anti-scourability of natural riverbanks are also highlighted.

ACS Style

Jinsheng Fan; Heqing Huang; Guoan Yu; Teng Su. River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method. Water 2020, 12, 1250 .

AMA Style

Jinsheng Fan, Heqing Huang, Guoan Yu, Teng Su. River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method. Water. 2020; 12 (5):1250.

Chicago/Turabian Style

Jinsheng Fan; Heqing Huang; Guoan Yu; Teng Su. 2020. "River Channel Forms in Relation to Bank Steepness: A Theoretical Investigation Using a Variational Analytical Method." Water 12, no. 5: 1250.

Journal article
Published: 15 March 2020 in Water
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Mun River is the largest tributary of the Mekong River in Thailand and provides abundant water resources not only for an important agricultural area in Thailand but also for the lower Mekong River. To understand how the runoff of Mun River responds to climate change and human activities in recent decades, this study performed a detailed examination of the characteristics of runoff variation based on measurements at two hydrological gauging stations on the main stem of Mun River during 1980–2018. Using the Mann-Kendall test, Morlet wavelet transform and Double Cumulative Curve methods, this study identifies that the variation of annual runoff of Mun River encountered an abruption in 1999/2000, with an increased trend taking place since then. Furthermore, a detailed assessment of the effects of the variations in rainfall, temperature, evaporation, and land use types extracted from remote sensing images at the basin scale reveals that a significant reduction in forest area and slight reductions in evaporation and farmland area taking place since 1999 can lead to an increase in the runoff of Mun River, while the dramatic increase in garden area since 1999 tends to make the runoff decrease.

ACS Style

Renzhi Li; Heqing Huang; Guoan Yu; Hong Yu; Arika Bridhikitti; Teng Su. Trends of Runoff Variation and Effects of Main Causal Factors in Mun River, Thailand During 1980–2018. Water 2020, 12, 831 .

AMA Style

Renzhi Li, Heqing Huang, Guoan Yu, Hong Yu, Arika Bridhikitti, Teng Su. Trends of Runoff Variation and Effects of Main Causal Factors in Mun River, Thailand During 1980–2018. Water. 2020; 12 (3):831.

Chicago/Turabian Style

Renzhi Li; Heqing Huang; Guoan Yu; Hong Yu; Arika Bridhikitti; Teng Su. 2020. "Trends of Runoff Variation and Effects of Main Causal Factors in Mun River, Thailand During 1980–2018." Water 12, no. 3: 831.

Journal article
Published: 15 October 2019 in International Journal of Environmental Research and Public Health
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The water quality of the Mun River, one of the largest tributaries of the Mekong River and an important agricultural area in Thailand, is investigated to determine its status, identify spatiotemporal variations and distinguish the potential causes. Water quality dataset based on monitoring in the last two decades (1997–2017) from 21 monitoring sites distributed across the basin were analyzed using seasonal Kendall test and water quality index (WQI) method. The Kendall test shows significant declines in fecal coliform bacteria (FCB) and ammonia (NH3) in the upper reaches and increases in nitrate (NO3) and NH3 in the lower reaches. Strong temporal and spatial fluctuations were observed in both the concentrations of individual parameters and the WQI values. Seasonal variation of water quality was observed at each monitoring site. WQI values in August (flood season) were generally among the lowest, compared to other seasons. Spatially, sites in the upper reaches generally having lower WQI values than those in the lower reaches. Excessive phosphorus is the primary cause of water quality degradation in the upper reaches, while nitrogen is the primary parameter for water quality degradation in the lower reaches. Urban built-up land is an important “source” of water pollutants in the lower basin, while agricultural land plays a dual role, affecting across the basin.

ACS Style

Haoyu Tian; Guo-An Yu; Ling Tong; Renzhi Li; He Qing Huang; Arika Bridhikitti; Thayukorn Prabamroong. Water Quality of the Mun River in Thailand—Spatiotemporal Variations and Potential Causes. International Journal of Environmental Research and Public Health 2019, 16, 3906 .

AMA Style

Haoyu Tian, Guo-An Yu, Ling Tong, Renzhi Li, He Qing Huang, Arika Bridhikitti, Thayukorn Prabamroong. Water Quality of the Mun River in Thailand—Spatiotemporal Variations and Potential Causes. International Journal of Environmental Research and Public Health. 2019; 16 (20):3906.

Chicago/Turabian Style

Haoyu Tian; Guo-An Yu; Ling Tong; Renzhi Li; He Qing Huang; Arika Bridhikitti; Thayukorn Prabamroong. 2019. "Water Quality of the Mun River in Thailand—Spatiotemporal Variations and Potential Causes." International Journal of Environmental Research and Public Health 16, no. 20: 3906.

Journal article
Published: 30 May 2019 in Water
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Dam operation has been widely deployed to mitigate the risks of ice jam flooding, but it may result in a decrease in the discharging capacities of downstream river channels. The Ningxia-Inner Mongolia reach of the Huanghe River (Yellow River) has historically suffered numerous disasters caused by ice jam flooding, and three large dams have been jointly operated to mitigate such risks since 1968. Whilst the resultant significant increases in both the annual runoff and mean water temperature during the ice jam flooding seasons helped to shorten the freezing-up duration and reduce the thickness of the ice cover, a significant channel shrinkage occurred in the reach when the dam operation took place under the input of a relatively larger amount of sediment from the upstream. In the new flow regime that commenced in 2008, a detailed examination of the river channel-form adjustments and the resultant changes to the discharging capacities identified a slight increase in the discharging capacity of the channel along the entire study reach. This was mainly due to a significantly smaller amount of sediment load being carried by a slightly increased annual runoff. Whilst it was demonstrated that the dam operation was still an effective means for mitigating the risk of ice jam flooding in the Ningxia-Inner Mongolia reach under the new flow regime, care needs to be taken when the favorable flow-sediment condition changes. Furthermore, the effectiveness of the dam operation appeared to vary significantly at the channel sections of different planforms; thus, more detailed studies are required.

ACS Style

Teng Su; Heqing Huang; Yuanyuan Zhou; Guoan Yu. Dam Operation for Mitigating Ice Jam Flooding Risks under the Adjustment of River Channel-Forms: Implications from an Evaluation in the Ningxia-Inner Mongolia Reach of the Upper Yellow River, China. Water 2019, 11, 1136 .

AMA Style

Teng Su, Heqing Huang, Yuanyuan Zhou, Guoan Yu. Dam Operation for Mitigating Ice Jam Flooding Risks under the Adjustment of River Channel-Forms: Implications from an Evaluation in the Ningxia-Inner Mongolia Reach of the Upper Yellow River, China. Water. 2019; 11 (6):1136.

Chicago/Turabian Style

Teng Su; Heqing Huang; Yuanyuan Zhou; Guoan Yu. 2019. "Dam Operation for Mitigating Ice Jam Flooding Risks under the Adjustment of River Channel-Forms: Implications from an Evaluation in the Ningxia-Inner Mongolia Reach of the Upper Yellow River, China." Water 11, no. 6: 1136.

Journal article
Published: 15 April 2019 in Sustainability
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Sustainable ecosystem services consumption is of vital importance to the survival and development of human society. How to balance the conflicts between ecosystem protection and ecosystem services consumption by local residents has been a serious challenge, especially in ecologically vulnerable areas. To explore the reasonable ecosystem services consumption approaches of grassland ecosystems for sustainable land system management, this study takes Hulun Buir of the Inner Mongolia Autonomous Region as a case study region and develops an EcoC-G (ecological consumption of grassland) model based on herders’ livelihood behaviors using the agent-based model technique to simulate the dynamics of ecosystem pressure, livestock production, and living quality of herders under different grassland management scenarios over the next 30 years. The EcoC-G model links the supply and consumption of grassland ecosystem services by calculating the ecosystem net primary productivity (NPP) supply and household NPP consumption. The model includes three sub-models, namely, the individual status transferring sub-model, the households’ grassland-use decision sub-model, and the ecosystem pressure sub-model. In accordance with multi-objective grassland management practices, the following four land management scenarios were simulated: (1) baseline scenario, (2) increasing household’s living standard, (3) ecosystem protection, and (4) balancing living standard improvement with the protection of the ecosystem. The result indicates that by focusing on the NPP supply and consumption of the grassland ecosystem, the EcoC-G is capable of simulating the impacts of herders’ livelihood behaviors on grassland ecosystems. If timely grassland management strategies are implemented, it is possible to relieve the ecosystem pressure and improve the livelihood of local herders. The specific scenario simulation results are: (1) Under the current grassland management mode, the pasture could never be overgrazed, and herders could achieve the basic living standard, but the accumulated wealth decreased due to the decline of livestock. (2) With grazing control, herders can accumulate wealth by increasing the breeding amount and reducing the marketing rate, but the ecosystem consumption pressure can reach a maximum of 2.3 times. (3) With strict restrictions on the livestock number, the pressure on the ecosystem decreases; however, herders might not achieve basic living standards. (4) Modest regulation leads to rational ecological consumption intervals, meaning the ecosystem pressure will become stable and herders can gradually accumulate wealth with the achievement of basic living standards in advance.

ACS Style

Huimin Yan; Lihu Pan; Zhichao Xue; Lin Zhen; Xuehong Bai; Yunfeng Hu; He-Qing Huang. Agent-Based Modeling of Sustainable Ecological Consumption for Grasslands: A Case Study of Inner Mongolia, China. Sustainability 2019, 11, 2261 .

AMA Style

Huimin Yan, Lihu Pan, Zhichao Xue, Lin Zhen, Xuehong Bai, Yunfeng Hu, He-Qing Huang. Agent-Based Modeling of Sustainable Ecological Consumption for Grasslands: A Case Study of Inner Mongolia, China. Sustainability. 2019; 11 (8):2261.

Chicago/Turabian Style

Huimin Yan; Lihu Pan; Zhichao Xue; Lin Zhen; Xuehong Bai; Yunfeng Hu; He-Qing Huang. 2019. "Agent-Based Modeling of Sustainable Ecological Consumption for Grasslands: A Case Study of Inner Mongolia, China." Sustainability 11, no. 8: 2261.

Journal article
Published: 04 January 2019 in Water
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Extreme cold and meteorological drought in the Mongolian Plateau (MP) were investigated during 1969–2017. Several drought indices were evaluated by analyzing recorded historical drought data in the Chinese region of the MP. The evaluated drought indices were then applied to detect drought characteristics in the entire MP. The trends of extreme cold indices showed that the climate of the MP has warmed during the past 49 years; however, the frequency of cold day/night has increased in the Mongolian region. The climate of Mongolia has also become colder in the spring season. The comprehensive meteorological drought index (CMDI) and the standardized precipitation index with a six-month scale (SPI6) exhibited better performances, showing high consistency between the spatial patterns of the two indices. However, drought represented by the SPI6 was enhanced greater than that expressed by the CMDI. Drought in the MP has been enhanced during the past 49 years, particularly in the Ordos and Alashan plateaus and the Xiliao River basin in China. Moreover, drought has been enhanced from August to October, particularly in the Mongolian region. However, spring drought has shown a weakening trend, which has been beneficial for agriculture and husbandry sectors in some regions of the MP.

ACS Style

Zhaofei Liu; Zhijun Yao; Heqing Huang; Batbuyan Batjav; Rui Wang. Evaluation of Extreme Cold and Drought over the Mongolian Plateau. Water 2019, 11, 74 .

AMA Style

Zhaofei Liu, Zhijun Yao, Heqing Huang, Batbuyan Batjav, Rui Wang. Evaluation of Extreme Cold and Drought over the Mongolian Plateau. Water. 2019; 11 (1):74.

Chicago/Turabian Style

Zhaofei Liu; Zhijun Yao; Heqing Huang; Batbuyan Batjav; Rui Wang. 2019. "Evaluation of Extreme Cold and Drought over the Mongolian Plateau." Water 11, no. 1: 74.

Journal article
Published: 01 December 2018 in Water
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The Yellow River (Huanghe River), which is the second largest river in China, has experienced dramatic changes in both runoff and sediment over the last 60 years. To quantify the effects on the channel morphology of the wandering reach on the Lower Yellow River (LYR), this study extracts morphological indices from Landsat imageries taken between 1979 and 2015. Over the dynamically adjusting complex channel-floodplain system, the spatial distribution of NDVI (Normalized Difference Vegetation Index) is found helpful for identifying the wandering belt created by the frequent migrations of the pathways of the main flow, which are determined from the reflection of the sediment-laded water body in remote sensing images taken at low flows. The extracted results show clearly that the average width and area of the wandering belt over the entire study reach declined in a dramatic fashion between 1979 and 2000 and yet both varied respectively within very narrow ranges from 2000 to 2015. Although the number of bends increased significantly since the 1990s, the sinuosity of the pathways of the main flow remained almost unchanged. By combining the morphological indices extracted from the remote sensing images with field hydrological and geomorphological measurements, our regression analysis identifies that the width of the wandering belt changes at the highest degree of correspondence with the width/depth ratio of the main channel and the variations of both are related most closely to the average flow discharge and then to sediment concentration during the flood seasons. These implicate that a significant reduction of the magnitude of floods and sediment concentration is beneficial not only for making the main channel transit from a wider and shallower cross-section into a narrower and deeper profile but also for narrowing the wandering range of the LYR.

ACS Style

Zhehui Xie; He Qing Huang; Guoan Yu; Min Zhang. Quantifying the Effects of Dramatic Changes in Runoff and Sediment on the Channel Morphology of a Large, Wandering River Using Remote Sensing Images. Water 2018, 10, 1767 .

AMA Style

Zhehui Xie, He Qing Huang, Guoan Yu, Min Zhang. Quantifying the Effects of Dramatic Changes in Runoff and Sediment on the Channel Morphology of a Large, Wandering River Using Remote Sensing Images. Water. 2018; 10 (12):1767.

Chicago/Turabian Style

Zhehui Xie; He Qing Huang; Guoan Yu; Min Zhang. 2018. "Quantifying the Effects of Dramatic Changes in Runoff and Sediment on the Channel Morphology of a Large, Wandering River Using Remote Sensing Images." Water 10, no. 12: 1767.

Research article
Published: 19 October 2018 in Hydrological Processes
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ACS Style

Yuanyuan Zhou; He Qing Huang; Lishan Ran; Changxing Shi; Teng Su. Hydrological controls on the evolution of the Yellow River Delta: An evaluation of the relationship since the Xiaolangdi Reservoir became fully operational. Hydrological Processes 2018, 32, 3633 -3649.

AMA Style

Yuanyuan Zhou, He Qing Huang, Lishan Ran, Changxing Shi, Teng Su. Hydrological controls on the evolution of the Yellow River Delta: An evaluation of the relationship since the Xiaolangdi Reservoir became fully operational. Hydrological Processes. 2018; 32 (24):3633-3649.

Chicago/Turabian Style

Yuanyuan Zhou; He Qing Huang; Lishan Ran; Changxing Shi; Teng Su. 2018. "Hydrological controls on the evolution of the Yellow River Delta: An evaluation of the relationship since the Xiaolangdi Reservoir became fully operational." Hydrological Processes 32, no. 24: 3633-3649.

Cover image
Published: 09 March 2018 in Earth Surface Processes and Landforms
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ACS Style

Jan-Hendrik May; He-Qing Huang; Toshiyuki Fujioka; David Fink; Alexandru Codilean; Guo-An Yu; Yuanxu Ma; Gerwin Wulf; Jing Gu. Cover Image. Earth Surface Processes and Landforms 2018, 43, 1 .

AMA Style

Jan-Hendrik May, He-Qing Huang, Toshiyuki Fujioka, David Fink, Alexandru Codilean, Guo-An Yu, Yuanxu Ma, Gerwin Wulf, Jing Gu. Cover Image. Earth Surface Processes and Landforms. 2018; 43 (3):1.

Chicago/Turabian Style

Jan-Hendrik May; He-Qing Huang; Toshiyuki Fujioka; David Fink; Alexandru Codilean; Guo-An Yu; Yuanxu Ma; Gerwin Wulf; Jing Gu. 2018. "Cover Image." Earth Surface Processes and Landforms 43, no. 3: 1.

Journal article
Published: 01 December 2017 in Science of The Total Environment
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Water allocation is facing profound challenges due to climate change uncertainties. To identify adaptive water allocation strategies that are robust to climate change uncertainties, a model framework combining many-objective robust decision making and biophysical modeling is developed for large rivers. The framework was applied to the Pearl River basin (PRB), China where sufficient flow to the delta is required to reduce saltwater intrusion in the dry season. Before identifying and assessing robust water allocation plans for the future, the performance of ten state-of-the-art MOEAs (multi-objective evolutionary algorithms) is evaluated for the water allocation problem in the PRB. The Borg multi-objective evolutionary algorithm (Borg MOEA), which is a self-adaptive optimization algorithm, has the best performance during the historical periods. Therefore it is selected to generate new water allocation plans for the future (2079-2099). This study shows that robust decision making using carefully selected MOEAs can help limit saltwater intrusion in the Pearl River Delta. However, the framework could perform poorly due to larger than expected climate change impacts on water availability. Results also show that subjective design choices from the researchers and/or water managers could potentially affect the ability of the model framework, and cause the most robust water allocation plans to fail under future climate change. Developing robust allocation plans in a river basin suffering from increasing water shortage requires the researchers and water managers to well characterize future climate change of the study regions and vulnerabilities of their tools.

ACS Style

Dan Yan; Fulco Ludwig; He Qing Huang; Saskia E. Werners. Many-objective robust decision making for water allocation under climate change. Science of The Total Environment 2017, 607-608, 294 -303.

AMA Style

Dan Yan, Fulco Ludwig, He Qing Huang, Saskia E. Werners. Many-objective robust decision making for water allocation under climate change. Science of The Total Environment. 2017; 607-608 ():294-303.

Chicago/Turabian Style

Dan Yan; Fulco Ludwig; He Qing Huang; Saskia E. Werners. 2017. "Many-objective robust decision making for water allocation under climate change." Science of The Total Environment 607-608, no. : 294-303.

Research article
Published: 16 October 2017 in Earth Surface Processes and Landforms
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The sandstone peak‐forest landscape in Zhangjiajie UNESCO Global Geopark of Hunan Province, China, is characterized by >3000 vertical pillars and peak walls of up to 350 m height, representing a spectacular example of sandstone landform variety. Few studies have addressed the mechanisms and timescales of the longer‐term evolution of this landscape, and have focused on fluvial incision. We use in situ cosmogenic nuclides combined with GIS analysis to investigate the erosional processes contributing to the formation of pillars and peak‐forests, and discuss their relative roles in the formation and decay of the landscape. Model maximum‐limiting bedrock erosion rates are the highest along the narrow fluvial channels and valleys at the base of the sandstone pillars (~83–122 mm kyr−1), and lowest on the peak wall tops (~2.5 mm kyr−1). Erosion rates are highly variable and intermediate along vertical sandstone peak walls and pillars (~30 to 84 mm kyr−1). Catchment‐wide denudation rates from river sediment vary between ~26 and 96 mm kyr−1 and are generally consistent with vertical wall retreat rates. This highlights the importance of wall retreat for overall erosion in the sandstone peak‐forest. In combination with GIS‐derived erosional volumes, our results suggest that the peak‐forest formation in Zhangjiajie commenced in the Pliocene, and that the general evolution of the landscape followed our sequential refined model: (i) slow lowering rates following initial uplift; (ii) fast plateau dissection by headward knickpoint propagation along joints and faults followed by; (iii) increasing contribution of wall retreat in the well‐developed pillars and peak‐forests and a gradual decrease in overall denudation rates, leading to; (iv) the final consumption of pillars and peak‐forests. Our study provides an approach for quantifying the complex interplay between multiple geomorphic processes as required to assess the evolutionary pathways of other sandstone peak‐forest landscapes across the globe. Copyright © 2017 John Wiley & Sons, Ltd.

ACS Style

Jan-Hendrik May; He-Qing Huang; Toshiyuki Fujioka; David Fink; Alexandru Codilean; Guo-An Yu; Yuanxu Ma; Gerwin Wulf; Jing Gu. Evolution of sandstone peak-forest landscapes - insights from quantifying erosional processes with cosmogenic nuclides. Earth Surface Processes and Landforms 2017, 43, 639 -653.

AMA Style

Jan-Hendrik May, He-Qing Huang, Toshiyuki Fujioka, David Fink, Alexandru Codilean, Guo-An Yu, Yuanxu Ma, Gerwin Wulf, Jing Gu. Evolution of sandstone peak-forest landscapes - insights from quantifying erosional processes with cosmogenic nuclides. Earth Surface Processes and Landforms. 2017; 43 (3):639-653.

Chicago/Turabian Style

Jan-Hendrik May; He-Qing Huang; Toshiyuki Fujioka; David Fink; Alexandru Codilean; Guo-An Yu; Yuanxu Ma; Gerwin Wulf; Jing Gu. 2017. "Evolution of sandstone peak-forest landscapes - insights from quantifying erosional processes with cosmogenic nuclides." Earth Surface Processes and Landforms 43, no. 3: 639-653.

Article
Published: 09 August 2017 in Hydrological Processes
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The channel boundary conditions along the Lower Yellow River (LYR) have been altered significantly since the 1950s with the continual reinforcement and construction of both main and secondary dykes and river training works. To evaluate how the confined complex channel–floodplain system of the LYR responds to floods, this study presents a detailed investigation of the relationship between the tempo-spatial distribution of sedimentation/erosion and overbank floods occurred in the LYR. For large overbank floods, we found that when the sediment transport coefficient (ratio of sediment concentration of flow to flow discharge) is less than 0.034, the bankfull channel is subject to significant erosion, whereas the main and secondary floodplains both accumulate sediment. The amount of sediment deposited on the main and secondary floodplains is closely related to the ratio of peak discharge to bankfull discharge, volume of water flowing over the floodplains, and sediment concentration of overbank flow, whereas the degree of erosion in the bankfull channel is related to the amount of sediment deposited on the main and secondary floodplains, water volume, and sediment load in flood season. The significant increase in erosion in the bankfull channel is due to the construction of the main and secondary dykes and river training works, which are largely in a wide and narrow alternated pattern along the LYR such that the water flowing over wider floodplains returns to the channel downstream after it drops sediment. For small overbank floods, the bankfull channel is subject to erosion when the sediment transport coefficient is less than 0.028, whereas the amount of sediment deposited on the secondary floodplain is associated closely with the sediment concentration of flow. Over the entire length of the LYR, the situation of erosion in the bankfull channel and sediment deposition on the main and secondary floodplains occurred mainly in the upper reach of the LYR, in which a channel wandering in planform has been well developed.

ACS Style

Min Zhang; He Qing Huang; Paul A. Carling; Mingwu Zhang. Sedimentation of overbank floods in the confined complex channel-floodplain system of the Lower Yellow River, China. Hydrological Processes 2017, 31, 3472 -3488.

AMA Style

Min Zhang, He Qing Huang, Paul A. Carling, Mingwu Zhang. Sedimentation of overbank floods in the confined complex channel-floodplain system of the Lower Yellow River, China. Hydrological Processes. 2017; 31 (20):3472-3488.

Chicago/Turabian Style

Min Zhang; He Qing Huang; Paul A. Carling; Mingwu Zhang. 2017. "Sedimentation of overbank floods in the confined complex channel-floodplain system of the Lower Yellow River, China." Hydrological Processes 31, no. 20: 3472-3488.

Article
Published: 15 July 2017 in Chinese Geographical Science
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The lateral distributions of depth-averaged velocity in open compound channels with emerged and submerged vegetated floodplains were analyzed based on the analytical solution of the depth-integrated Reynolds-Averaged Navier-Stokes equation with a term to account for the effects of vegetation. The three cases considered for open channels were two-stage rectangular channel with emerged vegetated floodplain, rectangular channel with submerged vegetated corner, and two-stage rectangular channel with submerged vegetated floodplain, respectively. To predict the depth-averaged velocity with submerged vegetated floodplains, we proposed a new method based on a two-layer approach where flow above and through the vegetation layer was described separately. Moreover, further experiments in the two-stage rectangular channel with submerged vegetated floodplain were carried out to verify the results. The analytical solutions of the cases indicated that the corresponding analytical depth-averaged velocity distributions agree well with the simulated and experimental prediction. The analytical solutions of the cases with theoretical foundation and without programming calculation were reasonable and applicable, which were more convenient than numerical simulations. The analytical solutions provided a way for future researches to solve the problems of submerged vegetation and discontinuous phenomenon of depth-averaged velocity at the stage point for compound channels. Understanding the hydraulics of flow in compound channels with vegetated floodplains is very important for supporting the management of fluvial processes.

ACS Style

Mingwu Zhang; Chunbo Jiang; Heqing Huang; Gerald Charles Nanson; Zhengbing Chen; Wenyi Yao. Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains. Chinese Geographical Science 2017, 27, 577 -588.

AMA Style

Mingwu Zhang, Chunbo Jiang, Heqing Huang, Gerald Charles Nanson, Zhengbing Chen, Wenyi Yao. Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains. Chinese Geographical Science. 2017; 27 (4):577-588.

Chicago/Turabian Style

Mingwu Zhang; Chunbo Jiang; Heqing Huang; Gerald Charles Nanson; Zhengbing Chen; Wenyi Yao. 2017. "Analytical models for velocity distributions in compound channels with emerged and submerged vegetated floodplains." Chinese Geographical Science 27, no. 4: 577-588.

Article
Published: 20 April 2017 in Hydrological Processes
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Despite a growing interest in the sediment dynamics of dryland rivers, most research has been based on ephemeral streams in endogenic hydrological systems (runoff and sediment transport determined by local precipitation). Less attention, however, has been paid to allogenic and perennial dryland rivers. Here, we report a case study on the suspended sediment dynamics of the Tarim River, an allogenic and perennial river flowing in a very arid environment in China, based on mean daily discharge (Q) and mean daily suspended sediment concentration (SSC) over the last five decades (1960-2011). Results reveal that discharge and suspended sediment concentrations are predominantly low and have distributions with large positive skewness. The SSC-Q relationships can be fairly well generalized by power functions, with quite large scatter at extreme (low and high) flow conditions. Marked temporal and spatial variations were observed in the effective discharge for sediment transport. The frequency of the effective discharge ranged from 0.5 to 2% (or an average flow duration of 2-7 days/year), implying that moderate to high flows play an important role in sediment transport. The sediment rating curves show strong hysteresis effects, with three types of hysteresis loops observed, clockwise (the most predominant), anti-clockwise, and figure-of-eight. The high potential for bank collapse near the peak and falling limb of the flood hydrograph is the major cause of anti-clockwise and figure-of-eight hysteresis loops.

ACS Style

Guo-An Yu; Zhiwei Li; Markus Disse; He Qing Huang. Sediment dynamics of an allogenic river channel in a very arid environment. Hydrological Processes 2017, 31, 2050 -2061.

AMA Style

Guo-An Yu, Zhiwei Li, Markus Disse, He Qing Huang. Sediment dynamics of an allogenic river channel in a very arid environment. Hydrological Processes. 2017; 31 (11):2050-2061.

Chicago/Turabian Style

Guo-An Yu; Zhiwei Li; Markus Disse; He Qing Huang. 2017. "Sediment dynamics of an allogenic river channel in a very arid environment." Hydrological Processes 31, no. 11: 2050-2061.

Journal article
Published: 01 October 2016 in Sustainable Cities and Society
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Urbanizing delta regions face seasonal water shortages induced by rising salt intrusion. Decreasing river discharge is readily listed as the major cause of water shortage events. Yet, observations of river discharge often fail to support this attribution. Evidence of the association between severe salt intrusion and water use is weak and inconclusive. The present study asks to what extent water use contributes to salt intrusion and freshwater shortages. Moreover, it asks whether management of water use rather than water supply can be part of mitigating salt intrusion. The contribution of water use in causing severe salt intrusion events is assessed by first quantifying monthly sectorial water use and next comparing it with threshold discharges from the graded salt intrusion warning system. The case study region is the Pearl River Delta, China. Sectorial water use is found to substantially vary between months. In particular in the dry month in which water shortages are reported, water use can be more than 25% of discharge and thus exacerbates salt intrusion. Evaluation of coping strategies shows that improved water use can alleviate salt intrusion by up to one level in the warning system, thus preventing problems at a number of water abstraction points.

ACS Style

Mingtian Yao; Dan Yan; Pavel Kabat; Heqing Huang; Ronald W.A. Hutjes; Saskia E. Werners. Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas. Sustainable Cities and Society 2016, 26, 255 -263.

AMA Style

Mingtian Yao, Dan Yan, Pavel Kabat, Heqing Huang, Ronald W.A. Hutjes, Saskia E. Werners. Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas. Sustainable Cities and Society. 2016; 26 ():255-263.

Chicago/Turabian Style

Mingtian Yao; Dan Yan; Pavel Kabat; Heqing Huang; Ronald W.A. Hutjes; Saskia E. Werners. 2016. "Analysing monthly sectorial water use and its influence on salt intrusion induced water shortage in urbanized deltas." Sustainable Cities and Society 26, no. : 255-263.

Journal article
Published: 25 July 2016 in Progress in Geography
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ACS Style

Xie Zhehui; Huang Heqing; Zhou Yuanyuan; Zhang Min; 哲辉 解; 河清 黄; 园园 周. 游荡性河流演变规律研究进展及其河型归属探讨. Progress in Geography 2016, 35, 898 -909.

AMA Style

Xie Zhehui, Huang Heqing, Zhou Yuanyuan, Zhang Min, 哲辉 解, 河清 黄, 园园 周. 游荡性河流演变规律研究进展及其河型归属探讨. Progress in Geography. 2016; 35 (7):898-909.

Chicago/Turabian Style

Xie Zhehui; Huang Heqing; Zhou Yuanyuan; Zhang Min; 哲辉 解; 河清 黄; 园园 周. 2016. "游荡性河流演变规律研究进展及其河型归属探讨." Progress in Geography 35, no. 7: 898-909.

Journal article
Published: 25 May 2016 in 资源科学
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ACS Style

腾 苏; Su Teng; 河清 黄; 园园 周; Huang Heqing; Zhou Yuanyuan. 黄河宁蒙河段水文-水温过程和河道形态变化对凌汛的影响. 资源科学 2016, 38, 948 -955.

AMA Style

腾 苏, Su Teng, 河清 黄, 园园 周, Huang Heqing, Zhou Yuanyuan. 黄河宁蒙河段水文-水温过程和河道形态变化对凌汛的影响. 资源科学. 2016; 38 (5):948-955.

Chicago/Turabian Style

腾 苏; Su Teng; 河清 黄; 园园 周; Huang Heqing; Zhou Yuanyuan. 2016. "黄河宁蒙河段水文-水温过程和河道形态变化对凌汛的影响." 资源科学 38, no. 5: 948-955.

Book chapter
Published: 24 May 2016 in Governance in Transition
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Under the impact of climate change and human activities, water resources in the source zone of the Yellow River have decreased since the 1990s. At the same time, environmental deterioration, soil erosion, land desertification, shrinkage of wetlands and lakes, glacier ablation, deterioration of grasslands, rodent infestation, degradation of biological diversity and other environmental and ecological problems have arisen. As a result, the regional hydro-ecological system has become more and more vulnerable. Although the mean annual temperature in the region has increased by about 1.5 °C since the 1960s, the average annual precipitation since 2004 has exceeded the long-term average value, and the run-off at all hydrological sections on the main stream of the Yellow River has increased continuously since 2008, exceeding the long-term average. This may partly be due to the establishment of the Sanjiangyuan National Nature Reserve and the various soil and vegetation recovery programs undertaken since 2000. With the sharp decrease of run-off and sediment to the lower and estuarine reaches of the Yellow River, more effective measures for water and hydro-ecological systems conservation need to be implemented in the source zone.

ACS Style

He Qing Huang; Xiaofang Liu; Gary John Brierley; Carola Cullum. Hydrology of the Yellow River Source Zone. Governance in Transition 2016, 79 -99.

AMA Style

He Qing Huang, Xiaofang Liu, Gary John Brierley, Carola Cullum. Hydrology of the Yellow River Source Zone. Governance in Transition. 2016; ():79-99.

Chicago/Turabian Style

He Qing Huang; Xiaofang Liu; Gary John Brierley; Carola Cullum. 2016. "Hydrology of the Yellow River Source Zone." Governance in Transition , no. : 79-99.

Journal article
Published: 01 May 2016 in Geomorphology
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Anabranching rivers are formed of islands of various shapes and this study applies a variational analytical approach to explain the morphology of islands of a particular basic shape. A theoretically modeled anabranching river is developed based on observations from the middle and lower Yangtze River, which alternates between a single channel and a two-channel anabranching reach with islands approximately triangular in planform such that one anabranch is longer than the other. The equilibrium condition of the model river is derived from a variational investigation of basic relationships of flow continuity, channel boundary resistance, bedload transport, and energy conservation in the anabranching river. We demonstrate that when such a system reaches stationary equilibrium the triangular planform of the island is determined by the proportions of water and sediment passing through the two channels. We also show that the shorter straight channel takes a larger proportion of sediment relative to its proportion of water. For the island to take a streamlined morphology, the difference between the proportions of water and sediment discharge entering each channel needs to be as small as possible. When the paired proportions of water and sediment discharge take different values, the streamlined morphologies of the island vary in a wide range. In comparison with the measured morphologies of the five islands located in the middle-lower Yangtze River, the theoretically determined lengths of the islands are remarkably consistent, varying from the corresponding field measurements by a range of <±10%.

ACS Style

Xiaofang Liu; He Qing Huang; Gerald C. Nanson. The morphometric variation of islands in the middle and lower Yangtze River: A variational analytical explanation. Geomorphology 2016, 261, 273 -281.

AMA Style

Xiaofang Liu, He Qing Huang, Gerald C. Nanson. The morphometric variation of islands in the middle and lower Yangtze River: A variational analytical explanation. Geomorphology. 2016; 261 ():273-281.

Chicago/Turabian Style

Xiaofang Liu; He Qing Huang; Gerald C. Nanson. 2016. "The morphometric variation of islands in the middle and lower Yangtze River: A variational analytical explanation." Geomorphology 261, no. : 273-281.