Research on the Influencing Factors of Comprehensive Water Consumption by Impulse Response Function Analysis

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/$10 4 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/$10 4 GDP in Jiangsu Province. The results show that resource factors have a great impact on WC/$10 4 GDP in Jiangsu, and the per capita water resources (PW) has the most significant impact.

Re-Examining Regional Total-Factor Water Efficiency and Its Determinants in China: A Parametric Distance Function Approach

“…It was stated that China's per capita water resource was only one-quarter of the world average in 2014 [3]. Furthermore, the limited water resources are in an unbalanced distribution, 81% of which are distributed in the southern area of China [4]. Additionally, China is faced with a series of water environment problems such as groundwater level decline, water quality deterioration, water eutrophication and biodiversity reduction [5].…”

Integrated agricultural water pricing reform (IAWPR) in China: a state-of-the-art review with focus on strategic significance, policy design, reform process and case reform effect

“…(ii) The agricultural water-use efficiency needs to be greatly improved. For Jiangsu in 2014: the water consumption per $10,000 of GDP in Jiangsu was about 480 m 3 (Fang et al, 2017), and that in developed countries is generally less than 300 m 3 ; the area of irrigated arable land controlled by water-saving irrigation technologies only accounted for 36% of the total arable land; the farmland irrigation water utilization coefficient in irrigation districts was 0.590, which was far lower than the level of 0.7-0.8 in developed countries (Zhang et al, 2019). (iii) The O&M of the irrigation system needs to be greatly improved by increasing more qualified staff and government subsidies.…”

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