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Water 2017, 9(10), 759; https://doi.org/10.3390/w9100759

Assessing Factors Driving the Change of Irrigation Water-Use Efficiency in China Based on Geographical Features

1
Ocean College, Zhejiang University, Hangzhou 310058, China
2
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China
3
College of Civil Science and Engineering, Yangzhou University, Yangzhou 225009, China
*
Author to whom correspondence should be addressed.
Received: 14 August 2017 / Revised: 10 September 2017 / Accepted: 29 September 2017 / Published: 7 October 2017
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Abstract

Changes in irrigation water-use efficiency are related closely to agricultural development. Clarifying the driving factors of irrigation water-use efficiency change at different agricultural development stages is beneficial for buffering the contradiction between the protection of water resources and massive agricultural water consumption. It also has theoretical and application value when it comes to elucidating the driving characteristics of spatial changes in irrigation water-use efficiency observed among the different provinces of China. This paper analyzes driving factors of irrigation water-use change based on a study of literature and a field survey. It selects 21 indices from five aspects of climatic change, resource endowment, economic situation, technological level, and management mode as the system of driving factors for irrigation water-use change. This article then uses statistical data on economic and social development in the 31 provinces of China in 2009, and applies the principal component analysis (PCA) method to extract the main driving factors affecting irrigation water-use efficiency change. After calculation of factor scores, clustering analysis is conducted on the 31 provinces to explore regional differences among the driving factors of irrigation water-use efficiency change. The results show that these can be attributed to the factors of agricultural economic development, water-saving irrigation technology, water resource endowment, and dissipation. The 31 provinces can be divided into five types: agricultural economy strong driving type; agricultural economy dominant type; industrial economy dominant type; agriculture strong development type; and coordinated driving type. In highly agricultural provinces, mature irrigation district management and water-saving measures influence the efficiency of irrigation water-use, making these strong positive driving factors. In highly industrial provinces, changes in irrigation water-use efficiency are mainly driven by economic development and structural adjustment, making these weak driving factors. View Full-Text
Keywords: irrigation water-use efficiency; principal component analysis; cluster analysis; driving factors; geographical features quantification irrigation water-use efficiency; principal component analysis; cluster analysis; driving factors; geographical features quantification
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Fang, S.; Jia, R.; Tu, W.; Sun, Z. Assessing Factors Driving the Change of Irrigation Water-Use Efficiency in China Based on Geographical Features. Water 2017, 9, 759.

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