Water resource utilization efficiency and spatial autocorrelation analysis of water-receiving area of Yinjiang-Jihuai Project
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Abstract:
At present, the problem of the uneven spatial and temporal distribution of water resources in China is still very serious, and the lack of overall allocation capacity of water resources in river basins, the poor water ecological environment caused by water shortage, and the failure to eradicate flood and drought disasters have seriously affected China's economic modernization. The State Council of China proposed to vigorously promote the construction process of 172 major water conservancy projects, accelerate the construction of the national water network system, enhance the ability to allocate water resources across regions, and solve the dilemma faced by China's water resources. The Yinjiang-Jihuai Project is one of the 172 major water conservancy projects, realizing the connection of the Yangtze River and the Huai River, the fuze water receiving area and the area along the project, effectively improving the problem of water scarcity and ecological environment, and providing a strong guarantee for the economic take-off of the region.To identify the basic situation of water resource utilization in the engineering construction area and provide basic evaluation and analysis data for the project construction, 9 counties and districts in the water-receiving area of the henan section of the Yinjiang-Jihuai Project are selected to construct a water resource utilization efficiency index (WREI) system that includes three dimensions of water resources, economy and society, and ecological environment, and uses the evaluation method of "single index quantification-multi-index synthesis-multi-criterion integration" to measure the water resource utilization efficiency, and constructs an obstacle model to identify the constraints on the utilization efficiency of water resources in the water resources area. The agglomeration characteristics of water resource utilization efficiency in various counties and districts were analyzed by the spatial autocorrelation model.The results show that in the past decade, the WREI in the water-receiving area has shown a fluctuating upward trend, and under the background of sustainable development, the water resource utilization efficiency of the water-receiving area has been steadily improved and has reached a "high" level. The WREI of the nine counties has gradually converged from the existence of large spatial differences in 2010. The analysis of the obstacle factors of water resources utilization efficiency can be concluded that factors such as the proportion of ecological water use and the per capita water resources share restrict the improvement of water resource utilization efficiency. There is an obvious positive correlation between the water resource utilization efficiency of the water-receiving area of henan in the Yinjiang-Jihuai Project.The WREI in the southern section of the Yinjiang-Huaihe River showed a fluctuating upward trend, with an average annual growth rate of 3.55%, of which the average annual growth rate of EEI(Ecological Environment Index) was the largest and the average annual growth rate of WRI(Water Resources Index) was the smallest. The proportion of ecological water use and per capita water resources are the main constraints on the improvement of WREI in water areas, and the main obstacles in some counties and districts are indicators such as urbanization rate and water production modulus. There is an obvious positive correlation effect on the water resource utilization efficiency in the water-receiving area, taking county continues to show a low-low agglomeration model, and in 2021, the high-high agglomeration model in Suiyang District will fade, and the high-low agglomeration model in Zhecheng County will show a high-low accumulation model.
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