Study on ecological water level and ecological water demand of Dongting Lake
To protect the ecological system of Dongting Lake,we conducted a study on the ecological water level and ecological water demand of Dongting Lake based on the daily water level monitoring data at Lujiao,Yangliutan and Nanzui hydrometric sta-tions in Dongting Lake from 1961 to 2020.The ecological water level of Dongting Lake was calculated by natural water level data method,lake geomorphology method,minimum demand method for biological space,annual assurance rate method,minimum annu-al average water level method and frequency curve method.The ecological water demand of Dongting Lake was calculated by using the function method.The research results indicated that:① The lowest ecological water level in the east,south and west of Dongting Lake was 24.20,27.78,29.42 m respectively,and the suitable ecological water level was 25.80,29.07,30.08 m re-spectively.② The minimum ecological water demands in the east,south and west of Dongting Lake were 0.631,1.002 and 0.383 billionm3 respectively,the suitable ecological water demands were 1.266,1.399 and 0.461 billion m3,and the minimum and suitable ecological water demands of Dongting Lake were 2.016,3.126 billion m3.This study can provide reference and technical support for the rational allocation of water resources in the Dongting Lake region,the healthy operation of the lake ecosystem and the governance and protection of Dongting Lake.
ecological water levelecological water demandnatural water level data methodfrequency curve methodDongting Lake
国家科技期刊平台
NSTL
万方数据
