Understanding the Spatial-Temporal Changes of Oasis Farmland in the Tarim River Basin from the Perspective of Agricultural Water Footprint

Water

Aihua Long¹  Cai Ren¹  Xinlin He¹  Jiawen Yu¹  Ji Zhang¹  Haifeng Gao²  Jie Du³  Xiaoya Deng⁴ 

[1] College of Water and Architectural Engineering, Shihezi University, Shihezi 832000, China;Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing 100094, China;Power China Chengdu Engineering Co., Ltd., Chengdu 610072, China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;

关键词: oasis farmland;    crop production water footprint;    Standard Deviation Ellipse;    Gini coefficient;    spatial mismatch index;   

DOI  :  10.3390/w13050696

来源: DOAJ

【 摘 要 】

The Tarim River Basin in China has predominantly assumed the task of commodity cotton and other high water-intensive crop production in recent years. The spatial matching status of agricultural water and land resources is a prerequisite for local economic development. This paper provides an insight into the spatiotemporal variation trends of agricultural production water footprint and oasis farmland in the Tarim River Basin. The degree of spatial mismatching between oasis farmland and crop production water footprints studied in this paper found how the crop water footprint affected the change in oasis farmland area by sensitivity analysis. Time series data covering the period of 1990–2015 were used for the study. The results showed that the annual variation of crop production water footprint and oasis farmland area have experienced upward trends in Tarim River Basin. The blue water makes the largest contribution to the components of the crop production water footprint in each district (all exceeded 77%). The crop production water footprint and oasis farmland area tend to aggregate towards the eastern region. The level of spatial mismatch between the blue water footprint and farmland area fluctuated during the study period, but it was gradually remedied after 2000, while the spatial mismatch between green water footprint and farmland area gradually worsened. The number of districts with mid and high sensitivity to changes in blue water footprint continuously increased during 1990–2005, which revealed that the change in blue water footprint has an increasing influence on oasis farmland. The results can provide operable recommendations for efficient use of water resources, maintaining oasis suitable farmland scale and agricultural sustainable development in the Tarim River Basin.

【 授权许可】

Unknown