澜沧江流域农业灌溉需水的时空变化(英文)

编号 zgly0001585757

文献类型 期刊论文

文献题名 澜沧江流域农业灌溉需水的时空变化(英文)

作者 顾世祥  何大明  崔远来  李远华 

作者单位 StateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience  WuhanUniversity  YunnanInstituteforInvestigation  DesignandResearchofWaterResources&HydropowerEngineering  AsianInternationalRiversCenter  YunnanUniversity  Depart 

母体文献 Journal of Geographical Sciences 

年卷期 2012年03期

年份 2012 

分类号 S274 

关键词 agriculturalirrigationquota  LancangRiver  theLongitudinalRange-GorgeRegion 

文摘内容 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 Re-scaled 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 (ET0) 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, ET0, the arid-ity-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.