Temporal and spatial changes of agricultural water requirements in the Lancang River Basin

作     者：Gu Shixiang He Daming Cui Yuanlai Li Yuanhua 

作者机构：State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan University Yunnan Institute for InvestigationDesign and Research of Water Resources&Hydropower Engineering Asian International Rivers CenterYunnan University Department of IrrigationDrainage and Rural Water SupplyMWR 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2012年第22卷第3期

页      面：441-450页

核心收录：

学科分类：0709[理学-地质学] 08[工学] 09[农学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 0704[理学-天文学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：National Key Technologies R&D Program of China during the 12th Five-Year Plan Period, No.2010BAC09B07 Technical Experts Training Projects of Yunnan Province, No.2011CI092 

主　　题：agricultural irrigation quota Lancang River the Longitudinal Range-Gorge Region 

摘      要：Based on the data of eight meteorological stations from the 1950s to 2007, current cropping patterns, field water moisture management, we use the Mann-Kendall and the Rescaled Range Analysis methods to research the changes of humidity and crop irrigation water requirements in the Lancang River Basin. The results show that the annual and dry season average temperatures significantly increased, and the dry season rainfall increased while wet season rainfall decreased. Evaportranspiration （ETo） increased during both dry and wet seasons at all stations except Dali, Jianchuan and Gengma, and the aridity-humidity index decreased at most of the stations. The turning points of weather factors, ETo, the aridity-humidity index, paddy irrigation requirements and total agricultural water requirements occurred from the 1960s to the 1990s. The spatial changing tendency of paddy irrigation quota increased with the increase of altitude and latitude, and the correlation coefficients are 0.513 and 0.610, respectively. The maximum value is observed in Weixi, while the minimum in Mengla.