Study on the theory and method of urban eco-environmental water demand and distribution

2020 ◽  
Vol 180 ◽  
pp. 211-218
Author(s):  
Xiu-yu Zhang ◽  
Xue-fang Du ◽  
Si Chen ◽  
Tian Qin
Keyword(s):  
Water Demand ◽  
Environmental Water ◽  
Environmental Water Demand

Environmental water demand assessment under climate change conditions

2017 ◽  
Vol 189 (7) ◽  
Author(s):  
Parisa Sarzaeim ◽  
Omid Bozorg-Haddad ◽  
Elahe Fallah-Mehdipour ◽  
Hugo A. Loáiciga
Keyword(s):  
Climate Change ◽  
Water Demand ◽  
Environmental Water ◽  
Demand Assessment ◽  
Environmental Water Demand

scholarly journals Optimal operation of a multi-reservoir system for environmental water demand of a river-connected lake

2016 ◽  
Vol 47 (S1) ◽  
pp. 206-224 ◽  
Author(s):  
Jingqiao Mao ◽  
Peipei Zhang ◽  
Lingquan Dai ◽  
Huichao Dai ◽  
Tengfei Hu
Keyword(s):  
Normal Condition ◽  
Water Demand ◽  
Yangtze River ◽  
Environmental Water ◽  
Optimal Operation ◽  
Dongting Lake ◽  
Support Vector ◽  
Reservoir Operations ◽  
Reservoir System ◽  
Environmental Water Demand

Dongting Lake, a large river-connected lake in the Yangtze River watershed, plays important roles in flood control, drought mitigation, and biodiversity conservation. Its ecosystem has recently been severely affected by upstream water resource development such as reservoir operations. In this study, an optimization model is developed for the operation of a multi-reservoir system, including the Three Gorges Reservoir (TGR) on the upper Yangtze River and 8 major reservoirs on the tributaries to Dongting Lake. The optimal target in pursuit of the ecological objective is to maximize the environmental water demand (EWD) satisfaction of the lake. A support vector regression-based model is used to predict the response of the lake level to reservoir operations. The optimization is carried out under different scenarios for both normal and dry conditions, and the results show that: (i) the existing operation policy could result in significant hydrologic alteration; (ii) in the normal condition, the proposed optimal joint operation policy could increase the general EWD satisfaction rate of Dongting Lake from 85.4% to 95.7%; and (iii) the improvement of EWD satisfaction in the normal condition is mainly affected by the TGR, while in the dry condition, the southern and western lake regions are more sensitive to the tributaries' reservoirs.

Quantitative Study on Eco-Environmental Water Demand of Urban Water System

2013 ◽  
Vol 671-674 ◽  
pp. 2575-2579 ◽  
Author(s):  
Wen Jie Xu ◽  
Wei Guo Chen ◽  
Xiao Ping Zhang ◽  
Hui Ling Gong
Keyword(s):  
Quantitative Study ◽  
Water Demand ◽  
Water System ◽  
Environmental Water ◽  
Shandong Province ◽  
Urban Water ◽  
Normal Functions ◽  
Urban Water System ◽  
Sustainable Usage ◽  
Environmental Water Demand

Eco-environmental water demand of urban water system should be that of certain quality, which is necessary for it to develop its normal functions. The water system includes Dongchang Lake, Tuhai River and Old Canal in Liaocheng City, Shandong Province, China. The multiannual mean optimum, medium and minimum eco-environmental water demand of Dongchang Lake are respectively 2922.9×104m3, 2334.7×104m3 and 1746.4×104m3. Those of Tuhai River are respectively 4757.9×104m3, 2865.7×104m3 and 1919.7×104m3. Those of Old Canal are respectively 348.0×104m3, 277.9×104m3 and 207.9×104m3. Then those of the water system in Liaocheng City are respectively 8028.8×104m3, 5478.3×104m3 and 3874×104m3. These results can provide basis for protecting its eco-environment and promoting its sustainable usage.

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