• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊

Supervisor: Ministry of Water Resources of the People's Republic of China

Sponsor: Nanjing Institute of water resources, China Water Conservancy Society

Chief Editor: Zhang JianYun

Address: No.34, Hujuguan, Nanjing

Post Code: 210024

Tel: 025-85829770

Email: skxjz@nhri.cn

ISSN 1001-6791

CN 32-1309/P

Postal Code:28-146

Articles latest have been peer-reviewed and accepted, which are not yet assigned to volumes /issues, but are citable by Digital Object Identifier (DOI).
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Articles online first have been peer-reviewed and accepted, which are not yet assigned to volumes /issues, but are citable by Digital Object Identifier (DOI).
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Risk propagation from meteorological to hydrological droughts in a changing climate for main catchments in China
GU Lei, CHEN Jie, YIN Jiabo, GUO Qiang, WANG Huimin, ZHOU Jianzhong
2021, 32(3): 321-333.   doi: 10.14042/j.cnki.32.1309.2021.03.001
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Global climate change has altered the spatial-temporal regimes of hydro-meteorological variables. The impact of climate change on the risk transferability from meteorological to hydrological droughts needs to be investigated. Based on the gridded meteorological data and 19 global climate model simulations from the Coupled Model Inter-comparison Project Phase 5,the climate change scenarios were generated over 135 catchments in China for two future periods (2011—2055 and 2056—2100). The best performed hydrological model over four lumped models was selected for hydrological simulations. Based on precipitation scenarios and hydrological simulations,the Standard Precipitation Index (SPI) and the Standard Runoff Index (SRI) were respectively calculated for each catchment and time period. The meteorological and hydrological drought episodes were extracted based on the runoff theory. Finally,drought risks by incorporating the most likely selection into the Copula function were calculated,and the risk transferability from meteorological to hydrological droughts under the current and future climates were investigated. The results show that:① Meteorological and hydrological droughts are highly sensitive to future warming climates. Specifically,drought return periods are projected to lengthen in northern China,indicating mitigating risks,while they become shortened by 2 to 5 times over most catchments in central and southern China,indicating deteriorated conditions. ② The meteorological drought risks positively correlate with the hydrological drought risks under the current and future climates,with the Pearson correlation coefficients being higher than 0.99. ③ The sensitivity of hydrological to meteorological drought risks almost stay unchanged for each catchments for different future periods,whereas the co-occurrence of hydrological and meteorological droughts is projected to slightly increase over northern China under future warming climates.
Construction and evaluation of an integrated hydrological and hydrodynamics urban flood model
HUANG Guoru, CHEN Wenjie, YU Haijun
2021, 32(3): 334-344.   doi: 10.14042/j.cnki.32.1309.2021.03.002
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To reduce the losses induced by urban flood hazards,it is necessary to research urban flooding via numerical modeling and to obtain accurate and reliable flood information in advance. According to the hydrological and hydrodynamic theories and methods in urban flood research,a specific method for the coupling of one-and two-dimensional models is proposed in the present work. An integrated hydrological and hydrodynamic model is constructed via horizontal and vertical connections based on the Storm Water Management Model (SWMM) and a self-developed two-dimensional model. This research also proposes a novel coupling strategy for one-and two-dimensional models based on a dynamic-link library. The coupled model is verified by both theoretical and practical case studies. Taking the vertical connection problem as the theoretical case study,the correctness of the model was proven by comparing the model results with InfoWorks ICM software. To verify the flood modeling capacity of the model in watershed-scale areas,the Donghaochong Basin in Guangzhou was taken as another case study. The modeled results were found to be in line with the measured data under two historical rainfalls,which indicates that the model exhibited good precision and reliability in both pipe flow and surface flow simulations. In summary,the proposed coupling method is both reasonable and feasible,and the integrated hydrological and hydrodynamic model is reliable and of significant application value.
Driving mechanisms of urban floods under the changing environment: case study in the Wenyu River basin
REN Meifang, XU Zongxue, PANG Bo
2021, 32(3): 345-355.   doi: 10.14042/j.cnki.32.1309.2021.03.003
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Climate change and urbanization are regarded as the major driving factors for floods in urban watersheds. Many studies have witnessed the impact of climate change and urbanization on streamflow in different regions are different. Identification of driving factors for floods and quantifying the impact of climate change and urbanization on urban flood variation are important significance for floods management in urban watersheds. The Wenyu River basin in Beijing,which has undergone a highly urbanized process,is selected as the study area in this study. The GAMLSS model was developed for different probability of discharges in summer,with seasonal precipitation,air temperature,antecedent wetness,impervious areas and groundwater level as covariates,to study the mechanism of discharge variation in urban watershed. Results showed that all of the different probability of discharges in summer showed the nonstationary characteristics;increasing impervious areas and precipitation are major driving factors for floods in the Wenyu River basin. Different probability of discharge has different driving mechanism,smaller discharges with probability higher than 70% was mainly affected by changes of land use on ground surface,while the greater one,especially the extreme floods below 45% probability were mainly influenced by precipitation.
Quantifying attribution of the river hydrological health variation based on ecological-flow threshold method
JIANG Shanhu, ZHOU Le, REN Liliang, WANG Menghao, WEI Linyong, YUAN Fei
2021, 32(3): 356-365.   doi: 10.14042/j.cnki.32.1309.2021.03.004
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Environmental change has altered the river hydrological health regimes,and consequently affected the ecological health of river. Therefore,it is essential to develop a method to quantitatively analyze the attribution of river hydrological health evolution. This study selected the typical semi-arid Laohahe River basin in Northern China as a case study area. Observation data were obtained from 3 hydrological stations,17 rain gauge station and 6 meteorological stations in the study area. Firstly,the natural streamflow series from 1964 to 2016 was reconstructed using the observations and the Variable Infiltration Capacity (VIC) model. After that,the level of river hydrological health (H) was assessed based on the ecological flow threshold,which was calculated by probability density curve. Finally,the ‘simulated-observed’ comparison method was adapted to quantify the effect of climate changes and human activities on the river hydrological health. Results showed that human activities were the major factors that have caused river hydrological health deterioration since 1980 in Dianzi and Taipingzhuang sub-basins,which accounted for 86.9% and 87.9%,respectively. Widespread agricultural irrigation and reservoir operation were the two crucial reasons that caused the alterations of natural hydrological regime,which further led to the river ecological destruction over Laohahe River basin. Whereas,increasing rainfall in 1990s had a significant effect on maintaining river hydrological health because the large amount of rainfall helped reduce the human activities influence. The case study demonstrates that the attribution of river hydrological health evolution can be quantitatively described based on ecological-flow threshold and ‘simulated-observed’ comparison method,which will provide scientific basis for river ecology protection and water resource management under changing environment.
Exploring evapotranspiration characteristics in urbanized areas of Tianjin plain
CAO Runxiang, LI Fawen, LI Jianzhu, FENG Ping
2021, 32(3): 366-375.   doi: 10.14042/j.cnki.32.1309.2021.03.005
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To reveal the characteristics of urban-based evapotranspiration,a SEBS-Urban model was applied to estimate the monthly evapotranspiration(ET) that occurred in the plain area of Tianjin over 2015—2017 considering anthropogenic heat release. A two-step verification method was used. First,a comparative analysis was performed with the MODIS MOD16 products for rural areas. Second,the urban water dissipation (UWD) framework was used to assess the model's performance in built-up areas. The feasibility of the Budyko formula was explored based on the SEBS-Urban results. Three key results were obtained: ① The SEBS-Urban model is reliable,and the results of the built-up area ET analysis are consistent from the perspectives of an urban surface energy balance and a dualistic water cycle. ② The ET increment ranges up to 85%~115% for the built-up area but only 7.2%~8.7% for the whole study area after including considerations for anthropogenic heat. ③ The Budyko formula obtained good results for estimating evapotranspiration in the study area,suggesting that it can also be applied to urban areas. The results of this study can provide a necessary reference for studies on evapotranspiration in urbanized areas.
Multi-objective time-varying preference decision-making method for basin water resource dispatch and its application
DONG Zengchuan, NI Xiaokuan, CHEN Mufeng, YAO Hongyi
2021, 32(3): 376-386.   doi: 10.14042/j.cnki.32.1309.2021.03.006
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In view of the dynamic change of competition relationship and its intensity among multiple objectives in different periods of basin water resources system scheduling process,a multi-objective time-varying-preference decision-making method is proposed. Taking the lower reaches of Jinshajiang River as an example,the spatiotemporal variabilities of power generation and ecological objectives are analyzed,and the Pareto frontier cluster of these two targets in chronological order is constructed and calculated. In addition,based on the non-dominated relationship of sensitivity ratio between targets,the objective preference of decision makers in each scheduling period is identified quantitatively to form the decision support set of bias degree,and a multi-objective time-varying decision-making model is established. The results show that there is a significant competitive relationship between cascade power generation and ecological objectives in the lower reaches of Jinshajiang River in normal flow year. The competition is the strongest in the refill period and weakest in the flood season;the competition intensity strengthens with the increase of power generation in each period. The time-varying-preference decision-making method,based on the physical basis of dynamic Pareto front,can significantly optimize the ecological benefits while maintaining the power generation benefits,and improve the guarantee degree of ecological demand in the critical period.
Water resources spatial equilibrium evaluation method based on connection number and Lorenz curve
JIN Juliang, XU Xinguang, CUI Yi, ZHOU Rongxing, WU Chengguo, ZHANG Libing
2021, 32(3): 387-395.   doi: 10.14042/j.cnki.32.1309.2021.03.007
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In this study,an evaluation approach based on the connection number and Lorenz curve was proposed to investigate the quantitative impact of each sub-region on the spatial equilibrium of the water resources in the entire region during the evaluation process. The Lorentz curves connecting the total amount of water resources with cultivated land area,population and the secondary industry GDP were constructed,respectively,where the evaluation sample value based on the vertical distance was calculated. Meanwhile,the connection number of the sample was calculated via the set pair analysis,followed by the determination of equilibrium level and the comparison with the Gini coefficient method. Application of the proposed approach to Anhui Province of 2011—2018 revealed that the overall spatial imbalance status existed between the total amount of water resources and cultivated land area,population size along with the secondary industry GDP,respectively. In contrast,the level of equilibrium between the total amount of water resource and cultivated land area,population size has been ameliorated,while the equilibrium status of the total amount of water resource and the GDP of secondary industry remained serious that require further improvement. With the quantitative estimations,it offers a novel and effective way for estimating the spatial equilibrium of regional water resources.
Temporal variation characteristics and attribution analysis of terrestrial water storage change in the Yangtze River basin
NIE Ning, ZHANG Wanchang, CHEN Hao, ZHAO Dengzhong, LIU Min
2021, 32(3): 396-407.   doi: 10.14042/j.cnki.32.1309.2021.03.008
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We explored the temporal variation and attribution characteristics of terrestrial water storage change (TWSC) in the Yangtze River basin by using Gravity Recovery and Climate Experiment (GRACE) satellite observations and hydrological model simulations and reconstructing and analysing the monthly TWSC over the Yangtze River basin during 1988—2012. Based on the simulation results of 13 scenarios,we quantitatively separated the relative contributions of climate variability and crucial human activities (including land use changes and reservoir operations) to TWSC. The main results were as follows:① The basin-level averaged TWSC,precipitation,evapotranspiration,and runoff depth showed changing trends at linear rates of 0.1,-3.5,0.6,and-4.2 mm/a,respectively. ② The monthly non-seasonal TWSC was significantly and negatively correlated with the Southern Oscillation Index,with a significance level of α<0.01. ③ Climate variability played a leading role in the TWSC variations,and the contribution rates of reservoir operations to the monthly mean TWSC were negatively correlated with those of climate variability,and lastly. ④ Following the construction of the Three Gorges Reservoir,the influence of reservoir regulation on the monthly mean TWSC was significantly enhanced;it presented seasonal variations in which TWSC was reduced by reservoir operations during January—May and enhanced during July—December. This study developed a useful research framework for attribution analyses on TWSC,and the results can provide decision support for water resource planning and management in the Yangtze River basin.

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