Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
J Environ Manage. 2019 Jan 15;230:386-391. doi: 10.1016/j.jenvman.2018.09.060. Epub 2018 Oct 5.
The Heihe River is located in the arid zone of northwestern China. In its middle-reach region, irrigation agriculture is well developed. With rapid population growth and expansion of the cultivated land in this region, effective water resource use is vital for the sustainable development of the river basin and the increase of incomes from farming practices. In this study, based on farmer survey data, the input parameters of the CROPWAT model were modified, the water use amount was simulated after deducting the influences of climate, seeds, and irrigation systems, and the variation of economic efficiency of water use (EEWU) induced by crop structure adjustment from 2001 to 2012 was analyzed. The results show that simulations for evapotranspiration of maize based on the CROPWAT model are in accord with the observed data. From 2001 to 2012, due to changes in the regional crop structure, EEWU in the study area increased by about 40%. In the arid areas in northwest China, crop structure adjustment has a huge potential for improving EEWU and increasing incomes from farming practices.
黑河位于中国西北部干旱地区。在中游地区，灌溉农业发达。随着该地区人口的快速增长和耕地的扩张，有效水资源利用对流域的可持续发展和农业实践收入的增加至关重要。在本研究中，基于农民调查数据，对 CROPWAT 模型的输入参数进行了修正，模拟了扣除气候、种子和灌溉系统影响后的用水量，并分析了 2001 年至 2012 年期间由作物结构调整引起的用水经济效率（EEWU）的变化。结果表明，基于 CROPWAT 模型的玉米蒸散量模拟结果与观测数据相符。2001 年至 2012 年间，由于区域作物结构的变化，研究区的 EEWU 增加了约 40%。在中国西北干旱地区，作物结构调整在提高 EEWU 和增加农业实践收入方面具有巨大潜力。
