Calculation Method and Example Analysis of Landscape Environmental Water Demand for Medium and Small Rivers in the Northern Cities of China

摘要

Meeting landscape environmental water demand is one of the necessary conditions for realizing the stabilityand sustainablity of landscape environment. According to the characteristics of medium and small rivers inthe northern cities, based on the river function, the concept of landscape environmental water demand wasproposed, also its calculation method is studied in this paper. The landscape environmental water demandfor medium and small rivers in the northern area can be divided into two parts according to the river functionaltypes: environmental water demand and landscape water demand. To environmental water demand, accordingto river function, hydrological characteristics and water resources in different periods, the method to calculatethe water demand by stages is put forward in the paper. Then integrating with landscape water demand, thelandscape environmental water demand is calculated. Taking Shenyang Pu River ecological corridor as anexample, it is divided into 9 sections combined with practical application and the landscape environmentalwater demand is calculated by the partition and staging. The results show that the landscape environmentalwater demand of Pu River ecological corridor is 6749.56×10 4 m3/year.