关键词: 生态流量;水文学法;水文节律;满足程度;漓江;

Abstract: To calculate the ecological flow of Lijiang River and determine the appropriate calculation method of ecological flow, based on the monthly average runoff data of Guilin hydrology station from 1954 to 2017,six hydrological methods, namely Q90 method, annual distribution method, Texas method, monthly frequency method, NGPRP method and Tessman method were used to calculate the ecological flow of Lijiang River.The applicability of each calculation method was analyzed from three aspects of water demand, hydrological rhythm and satisfaction degree.The results showed that:(1) In terms of water demand, Q90 method was less than the basic water requirement during spawning period and the whole year, annual distribution method was less than the basic water requirement in the whole year, Tessman method was the largest in the general water consumption period, and monthly frequency method was the largest in the spawning period and the whole year.(2) In terms of hydrological rhythm, Q90 method could not reflect the seasonalvariation of wetand dry season.(3) In terms of satisfactiondegree, monthly frequency method had a lower guarantee rate in spawning period, while Tessman method had a lower guarantee rate in general water use period, dry season and annual range.(4) Considering the degree of water demand, hydrological rhythm and satisfaction degree, Texas method is the most suitable hydrological method for the calculation of ecological flow of Lijiang River.The monthly value range of ecological flow of Guilin hydrology station should be 11.4～124.0 m3/s.

Key words: ecological flow; hydrological methods; hydrological rhythm; satisfaction degree; Lijiang River;