IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 2- HYDRO-ENVIRONMENT : OPTIMAL OPERATION OF A MULTI-RESERVOIR SYSTEM FOR ENVIRONMENTAL WATER DEMAND OF A RIVER-CONNECTED LA...
OPTIMAL OPERATION OF A MULTI-RESERVOIR SYSTEM FOR ENVIRONMENTAL WATER DEMAND OF A RIVER-CONNECTED LAKE
Author : JINGQIAO MAO , PEIPEI ZHANG , LINGQUAN DAI & HUICHAO DAI
River-connected lakes play important roles in flood control, drought mitigation, water quality maintenance, and biodiversity conservation of watersheds. However, their ecosystems? functioning and stability might be sensitive to the altered flow regimes due to dam construction and flow regulation. Dongting Lake of China is a large shallow lake directly connected to Yangtze River in the middle region, of which its ecosystem functions have been threatened and disturbed by the upstream water resource development. In the study, an optimization model that considers both the basic human needs and environmental water demand (EWD) of Dongting Lake is developed for the operations of a multi-reservoir system. The system covers the world?s largest water resource project (Three Gorges Reservoir built on the upper Yangtze River) and two large reservoirs situated on the tributaries of Dongting Lake. The optimal target in pursuit of the ecological objective is to maximize the EWD satisfaction of Dongting Lake, which has been estimated from the analysis of long-term hydrological data. We use a support vector machine-based model to examine the response of lacustrine hydrological conditions to reservoir operation and inflow of other tributaries. The optimization is carried out for different scenarios, and the results show that: (i) the existing operation policy have been resulted in significant hydrologic alteration in the natural flow regime; (ii) an optimal joint operation policy proposed in the study could increase the general EWD satisfaction rate of Dongting Lake from 89.4% to 96.9%; (iii) the overall degree of lake?s EWD satisfaction is mainly affected by the operation of Three Gorges Reservoir.
File Size : 985,017 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 2- HYDRO-ENVIRONMENT
Date Published : 18/04/2016
Download Now