云南水稻灌溉定额与农业综合灌溉定额的空间变异性  

Spatial variability of rice irrigation quota and comprehensive irrigation quota in Yunnan Province

作　　者：谢先红[1] 崔远来[1] 顾世祥[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《农业工程学报》2007年第5期95-99,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：教育部新世纪优秀人才支持计划(NCET-04-0664);云南省滇中水资源大系统优化配置专题研究(YSZY-2003-01)

摘　　要：水稻灌溉定额和农业综合灌溉定额相互关联,且具有空间连续性。该文以云南省水稻灌溉定额和农业综合灌溉定额为例,分析了其分布类型和空间变异结构,结果表明它们分别符合对数正态分布和正态分布,两者表现出较小的各向异性,结构性因素起主要作用,受地形地貌、气象、土壤等因素影响较大,它们的变异函数分别很好地符合球形模型和线性模型。通过协克里金法插值得到云南水稻灌溉定额和农业综合灌溉定额的空间分布。前者在全省分布复杂,受经纬度共同作用,而后者主要受纬度影响,表现出4个特征区带。The rice irrigation quota and comprehensive irrigation quota are spatially continuous and interdependent. This paper, taking rice irrigation quota and comprehensive irrigation quota as examples from Yunnan Province, analyzes their distribution types and spatial variability structures. The two variables are close to lognormal and normal distribution, respectively, while their variograms are anisotropic and they mainly are influenced by the structure factors, such as the terrain landform, the meteorology and the soil. Their variograms can be described well by sphere model and linear model, respectively. Lastly, isograms of the two variables are obtained by Cokriging interpolatation. The rice irrigation quota is complex, changeable over the entire province and nonstationary varying with the latitude and longitude. However, the comprehensive irrigation quota varies regularly with the latitude and can be divided into four characteristic zones.

关 键 词：水稻 灌溉定额 空间变异性 变异函数 协克里金插值法 

分 类 号：S274.2[农业科学—农业水土工程]