黄河冲积平原表层土壤水力学参数的空间变异特征  

Spatial Variation Characteristics of Surface Soil Hydraulics Parameters in the Yellow River Alluvial Plain

作　　者：刘莉莉[1] 王琳 赵贵章[1] 潘登 湛江[1] LIU Li-li;WANG Lin;ZHAO Gui-zhang(North China University of Water Resources and Electric Power,Zhengzhou,Henan 450046;Geological Environmental Monitoring Institute of Henan Province,Zhengzhou,Henan 450006)

机构地区：[1]华北水利水电大学,河南郑州450046 [2]河南省地质环境监测院,河南郑州450006

出　　处：《安徽农业科学》2022年第6期60-63,共4页Journal of Anhui Agricultural Sciences

摘　　要：为了解黄河冲积平原表层土壤水力学参数的空间变异特征,以河南省兰考县为分析对象,采用地统计学和GIS相结合的方法,分析土壤表层水力学参数的空间变异。结果表明,土壤干容重和土壤含水率的变异系数分别为7.8%、9.2%,呈现出弱变异;土壤渗透系数的变异系数为173.2%,呈现出强变异。土壤水力学参数均具有二阶趋势效应。土壤干容重和土壤含水率的块基比分别为0.458、0.500,具有中等空间自相关性;土壤渗透系数的块基比为0.034,具有强空间自相关性。研究区土壤干容重和土壤含水率整体均表现为由西向东逐步增大;土壤渗透系数较大值主要集中在北部,较小值主要集中在中东部,整体表现为由中部向四周逐步增大。In order to understand the spatial variability characteristics of surface soil hydraulic parameters in the Yellow River alluvial plain,taking Lankao County in Henan Province as the object of analysis,the method of combining geostatistics and GIS was used to analyze the spatial variability of soil surface hydraulic parameters.The results showed that the coefficient of variation of soil dry bulk density and soil water content were 7.8%and 9.2%,respectively,showing a weak variability.The coefficient of variation of soil permeability coefficient was 173.2%,showing strong variability.The soil hydraulic parameters all had a second-order trend effect.The block-to-basis ratio of soil dry bulk density and soil moisture content were 0.458 and 0.500,respectively,which had medium spatial autocorrelation;the block-to-basis ratio of soil permeability coefficient was 0.034,which had strong spatial autocorrelation.The soil dry bulk density and soil moisture content in the study area showed a gradual increase from west to east as a whole.The larger value of soil permeability coefficient was mainly concentrated in the north,and the smaller value was mainly concentrated in the middle and east,the overall performance was gradually increasing from the middle to the surroundings.

关 键 词：黄河冲积平原 土壤水力学参数 地统计学 GIS 空间变异 

分 类 号：S152.7[农业科学—土壤学]