Guan'gai paishui xuebao (Jun 2021)
Analysis on Spatial-temporal Matching Characteristics of Agricultural Water and Soil Resources in the Yellow River Basin
Abstract
【Background】 The Yellow River Basin is an important grain base of China. The spatial-temporal matching characteristics of water and soil resources directly affect the level of grain production in this basin. 【Objective】 In order to find out the reasons for the structural water shortage caused by the unbalanced resource matching of the Yellow River Basin. 【Method】 Based on the comprehensive analysis framework of “green water” and “blue water”, the Gini coefficient, the generalized agricultural water and soil resources matching coefficient, the coefficient of variation, and the Spearman rank correlation coefficient were used to analyzes the matching status and spatial-temporal matching characteristics of water and soil resources. 【Result】 The results show that the irrigation “blue water” in 9 provinces along the Yellow River from 2010 to 2016 is relatively matched with the area of land in the basin; the “green water” indicator of precipitation is increased to evaluate the matching degree of agricultural water and soil resources of the provinces in the secondary sub-regions along the Yellow River, among them Sichuan Province (above Longyangxia) is better, the Inner Mongolia Autonomous Region (inflow zone) is poor, the difference between them is about 2.3 times; the time variation of water and soil resources of each province in the secondary sub-regions shows a downward trend, indicating that the development of irrigation "blue water" has stabilized; the province in different secondary sub-regions has different water and soil spatial matching, the proportion of “blue water” in provinces with a better water and soil resources matching is higher. 【Conclusion】 In view of the matching characteristics of agricultural water and soil resources in the Yellow River Basin (including the obvious differences in the spatial-temporal matching, and the limited potential of water resources development and water-saving space), it is particularly important to implements interconnected water system project and inter-basin water transfer-supply project.
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