THE DYNAMIC EVOLUTION AND DRIVING FACTORS OF AGRICULTURAL WATER USE EFFICIENCY IN THE YELLOW RIVER IRRIGATION DISTRICTS:A CASE STUDY OF HENAN PROVINCE
This study is intends to explore the changing patterns of agricultural water use efficiency and the factors that influence it in the irrigation districts of the Yellow River,and so as to enhance agricultural water use efficiency,minimize disparities between irrigation districts,and optimize water resource management policies in the Yellow River Basin. The Sub-vector DEA approach was used to assess the efficiency of agricultural water usage in the Yellow River irrigation areas of Henan province,and the ArcGIS graphical approach was used to uncover geographical and temporal evolution features,while the panel Tobit model was used to find affecting elements. The results showed that:(1) Temporal evolution characteristics:Over the period of 2007 to 2021,the agricultural water usage efficiency in the Yellow River irrigation districts of Henan province witnessed a rise from 0.55 to 0.59,with an average value of 0.57. The average agricultural water use efficiency of the medium-sized Yellow River irrigation districts was higher than that of the overall irrigation districts,which in turn was higher than that of the large-scale irrigation districts. Furthermore,the agricultural water use efficiency varied significantly across various irrigation districts,with a pattern of being high at the extremes and low in the center. This suggested that there was sufficient space for enhancing the agricultural water use efficiency in these districts. (2) The spatial evolution features of agricultural water usage efficiency in the Yellow River irrigation districts of Henan province exhibited an uneven distribution,with greater values seen in the southern areas and lower values observed in the northern regions. The number of high-efficiency irrigation districts exhibited a northward trend in an inverted "N" pattern. (3) Rural per capita disposable income and effective irrigation level positively influenced the improvement of agricultural water usage efficiency. There was a direct correlation between the extent of urbanization and the efficiency of agricultural water use. Furthermore,the water consumption per thousand hectares of crops and the water consumption per unit of agricultural added value had a substantial detrimental effect on the agricultural water use efficiency in the Yellow River irrigation areas. Ultimately,specific strategies should be developed based on the key elements that influence agricultural water usage efficiency in the Yellow River irrigation districts in order to enhance its performance.
Yellow River Irrigation districtsagricultural water use efficiencyspatial-temporal differentiationurbanization levelHenan province
万方数据
维普
