Health Assessment and Protection Measures of Nanchuan River in Xining City,China
In order to diagnose the health status of Nanchuan River,we constructed a river health evaluation index system with 15 evaluation indexes in 5 sub-criteria layers,including morphological structural integrity,hydrological integrity,chemical integrity,biological integrity,and sustainability of social service functions.Hierarchical analysis was used to determine the weights of indicators and conduct health evaluation,with a view to providing reference for maintaining water ecological balance and realizing ecological protection and high-quality development of the watershed.The results show that the Nanchuan River has a health score of 79.04,which is in a state of overall health and is a Class II river.The sub-criteria stratum has a hydrologic integrity score of 40.40,a chemical integrity score of 94.64,a morphological structural integrity score of 76.36,a biological integrity score of 72.2,and a sustainability score of 95.36 for social service functions.Hydrological integrity scores are the lowest,and future enhancement of river health needs to focus on increasing vertical connectivity,improving the guaranteed ecological flow rate of rivers,and strengthening adaptive management of water resources.
River health assessmentHierarchical analysis methodNanchuan River
NETL
NSTL
万方数据
