Evaluation of water resources carrying capacity of Fukang based on DPSIR and principal component analysis
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Abstract:
Fukang city in Xinjiang province is faced with increasing scarcity of water resources and worsening ecology. Based on DPSIR, we conducted factor analysis of water resources carrying capacity (WRRC) and built a basic indicator system. Principal component analysis was used to select the main indicators of WRRC and entropy weight analysis was used to determine their weights. A comprehensive evaluation model was built to calculate and evaluate the WRRC of Fukang. The results showed that the selected 4 main indicators can well represent the basic indicator system with an accumulative contribution rate of 92.016%. The WRRC of Fukang fluctuated between 0.498-0.531 during 2006-2014. The rate of decline was slow and the fluctuation range decreased with time. Generally, the utilization has reached saturation. The increased use of agricultural water resulting from social and economic development was a main indicator of the decline in WRRC. But the trend of decline was strongly relieved by the expanding groundwater exploitation and water resources management practices in Fukang.
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