Abstract
Jiangsu is a major province located in the east of China, consuming a large amount of water resources. It is considered that improving the comprehensive water use efficiency has an important significance to achieve sustainable development of the economy in Jiangsu. Through extensive literature research and investigation of Jiangsu Province, this paper establishes comprehensive water use efficiency index system using water consumption per ten thousand dollar gross domestic product (WC/$104 GDP) as the research target. In the index system, resource factors such as surface water resources (SW), groundwater resources (GW), precipitation (PT), water resources per capita (PW), water consumption per capita (PC) and irrigation area per capita (PI) cannot be artificially altered. Furthermore, the variation amplitude of resource factors is very small. It shows that the linear regression model is not suitable to analyze the resource factors by changing the independent variables. In view of this situation, this paper introduces impulse response function on the basis of vector autoregressive model (VAR) to investigate the intrinsic link between resource factors and WC/$104 GDP in Jiangsu Province. The results show that resource factors have a great impact on WC/$104 GDP in Jiangsu, and the per capita water resources (PW) has the most significant impact.
Highlights
China’s per capita share of fresh water resources is about 2100 m3, just 28% of the World’s average.two thirds of China’s cities are short of water, and one fourth of these cities are in serious situation
Related data are from statistical yearbook of Jiangsu Province, water resources bulletin in Jiangsu
In Jiangsu Province, the results show that per capita water resources (PW), drought index (DI), per capita (PC), and WC/$104 GDP in Jiangsu are stable in time series
Summary
China’s per capita share of fresh water resources is about 2100 m3 , just 28% of the World’s average.two thirds of China’s cities are short of water, and one fourth of these cities are in serious situation. China’s per capita share of fresh water resources is about 2100 m3 , just 28% of the World’s average. The negative influence of water shortage on China’s economic growth reaches 1.0%–2.0%. The shortage of water resources has become one of the significant bottlenecks restricting China’s economic and social development. On World’s average, 711 m3 water resources should be consumed to create ten thousand dollar GDP, but in China, this figure is 1197 m3 (about 1.7 times World’s average). The China’s water consumption distribution is unbalance from the geographical perspective. Water consumption per ten thousand dollar GDP is 145 m3 in east of China, and the figures are 294 and 429 m3 in middle and west, respectively [1]
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