【作者】 张凯； 吕永清； 王润元； 司建华；

【Author】 ZHANG Kai1,2,FENG QI1,LV Yong-qing3,ZHANG Bo 3,SI Jian-hua1 (1.Cold and Arid Region Environmental and Engineering Research Institute Chinese Academy of Sciences,Lanzhou 730000,China;2.Institute of Arid Meteorology,China Meteorological Administration/Key(Open) Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province(CMA),Lanzhou 730020,China;3.Department of Geographic and Environmental Science,Northwest Normal University,Lanzhou 730070,China)

【机构】 中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室； 中国科学院寒区旱区环境与工程研究所； 西北师范大学地理与环境科学学院；

【摘要】 通过野外试验和室内分析,对民勤绿洲荒漠带土壤水分的空间分异进行了研究。结果表明:在水平方向上,土壤水分的平均值最大基本出现在绿洲区,最小是出现在绿洲荒漠过渡带;在绿洲区,土壤含水量由表层向下逐渐递增。过渡带土壤含水量呈现出表层和底层低,中间层高的特点。荒漠区土壤含水量呈现出表层和底层高,中层低的特点;土壤水分特性的变异系数最大的是过渡带,变异系数最小的是绿洲;土壤水分含量各层最佳拟合模型不尽相同。水分含量的自相关性不强,而受随机因素的影响较大。更多还原

【Abstract】 Based on field tests and laboratory analysis,spatial heterogeneity of soil water in oasis-desert belt of Minqin is studied.The results show that the maximum of soil water is located in oasis,and the minimum is shown up in oasis-desert belt in horizontal direction.The soil moisture contents increase gradually from the top to deeper layer of the soil in oasis.The soil moisture content is low at a depth of surface layers and deeper layers,and it is high at the middle layers in oasis-desert belt.In desert,the change of soil moisture content is just opposite with that in oasis-desert belt.The greatest variation coefficient of soil water properties occurs in oasis-desert belt,the smallest variation coefficient of soil water properties appears on oasis.The best simulation model of soil water in each layer is not completely identical.The soil moisture content has not strong spatial autocorrelation,and it is largely affected by random factors.更多还原