WATER RESOURCES UTILIZATION EFFICIENCY AND FACTORS OF YANGTZE RIVER BASIN BASED ON SHEPHARD'S WATER RESOURCES DISTANCE FUNCTION
It makes sense to study water resources utilization efficiency,temporal-spatial distribution and factors in the Yangtze River Basin for its water resources and economic development.This paper uses its 2012 to 2020 data of 11 provinces(cities)to establish a random front model of Shephard's water resources distance function,which is employed to study water utilization efficiency,factors and temporal-spatial differentiation in the Yangtze River Basin.Water footprint shows a stabilizing water footprint consumption in the Yangtze River Basin,with water use in the upper-reaches less than in the middle-to down-reaches.Variance of gross provincial water footprint is mainly contributed by agricultural production,then by industrial production.Water utilization efficiency by random front model of Shephard's water resources distance function shows a pattern of"low in middle reaches and high in upper-and down-reaches"with a decreasing trend,falling eastward in the upper reaches,and also falling in the middle-to down-reaches at a low level.Selected factors have passed significance tests,with a positive relation between water resources and utilization efficiency,indicating increment of water resources per capita promotes water utilization efficiency,an outstandingly positive relation between economy and water utilization efficiency,which means economic growth greatly boosts water utilization efficiency.Urbanization rate has an obviously positive relation with water utilization;the higher urbanization,the higher water utilization efficiency.The proportion of the third industry's GDP has an outstandingly negative relation with water utilization efficiency,suggesting a constraint of industrial structural adjustment on water utilization efficiency.This paper presents suggestions on establishing a trans-department coordination to intensity water resources management and monitoring,pushing forward regional cooperation and information sharing,optimizing industrial structure and promoting sustainable development.
water resources utilization efficiencywater footprintShephard's water resources distance functionrandom front modelthe Yangtze River Basin
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