Study of an evaluation method for water resources carrying capacity based on the projection pursuit technique

Abstract

It is of great significance to establish a scientific and reasonable water resources carrying capacity evaluation system and evaluation method on the basis of studying the interdependence and mutual relations of water resources, society, economy and the ecological environment. This can guide water resources utilization and economic and social development planning, and promote the sustainable development of water resources and the socio-economic system. Projection pursuit technology can achieve automatic index selection and index weight confirmation. When used to assess water resources carrying capacity, the subjectivity and uncertainty of index weights can be avoided. Meanwhile, it can also be used to optimize the index system, and can improve the accuracy of evaluation results and discrimination. In this paper, the projection pursuit grade model of water resources carrying capacity is established. The evaluation criteria are determined by combining the theory with practice. Grades I to IV indicate that the water resources capacity declines gradually. This is the first study of water resources carrying capacity in four municipalities in China. The results show that the water resources carrying capacity of the four municipalities in 2012 belong to the third level, Chongqing is close to the second level and Tianjin is close to the fourth level.

Study on the Measures for Optimizing China’s Provincial Territorial Space Based on the Perspective of Resource and Environmental Carrying Capacity in the New Situation

“…In terms of single elements, various researchers have different focuses and different evaluation elements, such as tourism resources [6,7], urbanization [8], and land [9]; the most studied element is the water environment [10][11][12][13], and most scholars select three key factors from water quantity, water quality, and ecology to construct the water resource carrying capacity evaluation index system, using the method of comparison. Through the comparison of the index values and evaluation criteria, the worst-case scenario of the comprehensive carrying capacity of the water resources system is derived [14]. As for the research methods, the main methods used are the SDG perspective, the three-dimensional balance model [15], Euclidean distance, the Gray-TOPSIS model [16], a two-dimensional model [17], a system dynamics model, the improved fuzzy comprehensive evaluation method [18,19], etc.…”

Spatiotemporal Variation of Groundwater Extraction Intensity Based on Geostatistics—Set Pair Analysis in Daxing District of Beijing, China

“…The values of groundwater extraction intensity between sample i and index j are calculated separately using the level eigenvalue method [32], and the calculations are as follows:…”

An Assessment of the Water Resources Carrying Capacity in Xinjiang

“…Shi et al [9] proposed the concept of the WRCC in China. Since then, great progress has been made in researches on the WRCC; however, the theoretical systems and methodological systems of the WRCC have not yet been generally accepted [10]. Ren et al [11] introduced a conceptual model of biological metabolism and deemed that water resources, as an input resource, were exported in the form of products, services, and pollutants after being consumed in socioeconomic systems.…”