Spatiotemporal matching characteristics and influencing factors of agricultural water and soil resources in China
Analyzing the spatiotemporal matching characteristics and influencing factors of agricultural water and soil resources across can provide a scientific basis for the rational allocation of agricultural water and soil resources.We took 31 provinces,au-tonomous regions,and municipalities in China as the research objects.The Gini coefficient method and agricultural water and soil resource matching coefficient method were used to evaluate and analyze the spatiotemporal matching characteristics of agricultural water and soil resources across the country and provinces from 2009 to 2019.The Sen-MK method was used to analyze the trend of changes in agricultural water and soil matching coefficients across provinces over the past 11 years.Finally,a panel regression model was used to explore the main influencing factors of their changes.The results are as follows:firstly,compared to 2009,the total water resources in China increased by 486.09 billion cubic meters,and the total arable land area decreased by 75 295 km2in 2019.The matching coefficient of agricultural water and soil resources increased from 0.601 8 to 0.665 2,indicating a high degree of mismatch and a trend of insignificant deterioration overall.Secondly,from the perspective of spatial pattern,the overall matching of agricultural water and soil resources in various provinces of China showed a spatial pattern of"the Southwest is better than the Northeast,marginal area is better than central area,forest area is better than agricultural area,and mountain area is better than plain area".Thirdly,from the perspective of temporal changes,the agricultural water and soil matching coefficient in Beijing has significantly decreased,while Shanghai,Guangxi,Chongqing,Guizhou,Yunnan,and Ningxia have significantly increased.Fourthly,agricultural water consumption and per capita water resources are the main factors affecting the matching of agricultural water and soil resources.In a word,the coordination degree of agricultural water and soil resource matching in China stayed highly imbal-anced during the whole 10 years.Dividing different levels of control zones based on the matching coefficient and developing differ-entiated control measures are effective ways to alleviate the imbalance of agricultural water and soil resource matching.
agricultural water and soil resourcesGini coefficientmatching efficient of agricultural water and soil resourcesSen-MKpanel regression model
国家科技期刊平台
NSTL
万方数据
维普
