ANALYSIS AND EVALUATION OF DIFFERENT CROP PRODUCTION AND PLANTING STRUCTURE IN FIVE PREFECTURES OF TARIM RIVER BASIN FROM 1990 TO 2020——BASED ON WATER FOOTPRINT
Adjusting and optimizing the regional crop production and planting structure,and improving the level and efficiency of agricultural water use in the Tarim River Basin,is an important measures to alleviate the contradiction of agricultural water use and realize sustainable development of water resources. In this study,the water footprint method including blue,green and gray was used to analyze the change characteristics of crop production WF under different crop production and planting structure adjustments in 5 Prefectures of the Tarim River Basin from 1990 to 2020. The results showed that:(1) From 1990 to 2020,the total water footprint of crop production total water footprint,blue water footprint,and gray water footprint increased by 29.7％,7.9％,and 199.7％,respectively. The green water footprint decreased by 36.6％. (2) The total water footprint of crop production in 2020 was 7.41 km3,and cotton,wheat and corn were the three crops with the highest water consumption. The water footprint intensity of beans was the largest,followed by cotton,and sugar beets had the smallest. (3) Wheat,corn,and cotton consumed the most irrigation water,and their blue water footprint accounted for 93.5％ of the total blue water footprint. In summary,through the scenario simulation of crop structure,it finds that adjusting the crop planting area to reduce rice to 0％,wheat to 83.08％,corn to 5％,and cotton to 10％,and keeping sugar beets and beans unchanged,which can help promote sustainable development in 5 Prefectures. Under this scenario,4.24％ of irrigation water will be saved and the supply of local wheat,corn,and cotton can will be ensured.
planting structure adjustmentTarim River Basinwater footprintwater consumptionsustainable development
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