Study on Spatial-Temporal Differentiation of Water Resources Carrying Capacity Evaluation in Liaoning Province

In order to study the spatial-temporal variation in the carrying capacity of water resources in Liaoning Province, 14 cities in Liaoning are used as research units based on the TOPSIS model (Technique for Order Preference by Similarity to an Ideal Solution). Firstly, the evaluation index system is constructed, and the subjective and objective assignment method combining the AHP method (Analytic Hierarchy Process) and entropy method are adopted to assign weights to the evaluation indexes. Again, the TOPSIS model is combined with GIS (Geographic Information System) to present the results. Finally, through the analysis of the research results, the corresponding countermeasures and suggestions are put forward. It is found that the T value of TOPSIS model closeness in Dalian and Yingkou is the closest to 0.2, which indicates that the carrying capacity is of high quality. The average T value of Fuxin is only 0.0949. The area of high-quality water resources carrying capacity in Liaoning has expanded from 8281 to 12 650 km 2 . The area of low level has expanded from 31 743 to 57 453 km 2 . The alarm area has expanded slightly. Intermediate area and good area has a certain reduction. The research results can provide a reference for the study of water resource, and lay a foundation for the work of economic development and environmental protection in Liaoning Province.