In order to judge the river ecological health grade reasonably and accurately, the set pair analysis principle and five-variable subtraction set pair potential were applied to river ecological health evaluation, and the five-variable subtraction set pair potential was used to judge the trend of ecological health development of the North Canal and identify and diagnose the vulnerability indicators of river ecological health. The results show that the ecology of the North Canal is in a sub-health state. To improve the ecological health of the North Canal, priority should be given to the water quality index, and the water quality in the upstream should be improved promptly. Meanwhile, it is also important to improve the river connectivity and enhance the flood control function of the whole river section. River ecological health evaluation method based on the subtraction set pair potential is simple and universal, and the evaluation and analysis results are reasonable, which can provide a new idea for river ecological health evaluation.
金菊良,李蔓,周戎星,等.减法集对势法在河流生态健康评价与诊断中的应用[J].水资源保护,2022,38(1):198-204.(JIN Juliang, LI Man, ZHOU Rongxing, et al. Application of subtraction set pair potential method in river ecological health evaluation and diagnosis[J]. Water Resources Protection,2022,38(1):198-204.(in Chinese))复制