Evaluation of the degree of satisfaction of river ecological flow —Taking the Kushui River in Ningxia as an example

Abstract

 In order to comprehensively evaluate the degree of satisfaction of ecological flow in rivers, an evaluation system was constructed based on the daily average flow, monthly average flow, and the lowest monthly flow data of the Kushui River in Ningxia from 2017 to 2019, including indicators such as flow changes, flow satisfaction at different levels, ecological water demand guarantee, and monthly average ecological water demand suitability, to assess the health status of the Kushui River. The results showed that the minimum runoff of the Guojiaqiao hydrological station in the Kushui River during the dry season was relatively small, with a large gap compared to the annual average daily flow, but the degree of ecological flow guarantee was high, reflecting the seasonal and uneven distribution characteristics of the Kushui River. It is recommended to strengthen the research on the dispatching of water storage reservoirs, rationally allocate water, and gradually improve and improve the sustainable guarantee degree of ecological flow in the Kushui River.