江汉平原土壤饱和渗透系数空间变异特征  

Spatial variability characteristics of soil saturated permeability coefficient in Jianghan Plain

作　　者：刘天奇 汪丙国[2] 陈冠宇 Liu Tianqi;Wang Bingguo;Chen Guanyu(Seven Geological Brigade of Hubei Geological Bureau,Yichang,Hubei 443100;China University of Geosciences,Wuhan,Hubei 430074)

机构地区：[1]湖北省地质局第七地质大队,湖北宜昌443100 [2]中国地质大学(武汉),湖北武汉430074

出　　处：《资源环境与工程》2024年第6期671-680,共10页Resources Environment & Engineering

摘　　要：为揭示江汉平原土壤物性参数的空间变化规律,采用经典统计学及地统计学分析方法,研究其土壤饱和渗透系数的空间变异性。结果表明,研究区内土壤饱和渗透系数显示强变异特征,变异系数为267.21%,空间变异性受土壤随机变异及结构性变异的共同控制;不同的土壤质地中,土壤饱和渗透系数变异性差别较大,表现为砂壤土(变异系数为7.12%)<粉砂壤土(变异系数为14.20%)<粉砂质黏壤土(变异系数为16.30%),同一质地土壤中冲积物变异性较湖积物更大;不同土地利用方式中,耕作土壤粉砂壤土和粉砂质黏壤土空间变异系数分别为18.07%、25.12%,非耕作土壤分别为5.85%、3.29%,耕作土壤变异性较非耕作土壤大;不同测定方法下,室内原状实验测得的粉砂壤土和粉砂质黏壤土变异系数分别为14.20%、16.30%,而野外原位试验分别为32.73%、35.37%,具有更强的变异性。土壤饱和渗透系数变异性受土壤物性参数、土壤质地、沉积环境、土地利用方式、测定方法等因素的共同影响,土地利用等随机因素对土壤饱和渗透系数变异性具有更强的控制作用。In order to reveal the spatial variation of soil physical parameters in Jianghan Plain,classical statistics and geostatistical analysis methods are used to explore the spatial variability of soil saturated permeability coefficient in the study area.In the result,soil saturated permeability coefficient show strong variation characteristics,with a coefficient of variation of 267.21%.The spatial variability is jointly controlled by soil random variation and structural variation.For the different soil texture,the variability of soil saturated permeability coefficient varies greatly.They from low to high are sandy loam(coefficient of variation is 7.12%),silty loam(coefficient of variation is 14.20%)and ssilty clay loam(coefficient of variation is 16.30%).Moreover,the variability of alluvial deposits is greater than that of lacustrine deposits in soils of the same texture.Among different land use methods,the spatial variation coefficients of cultivated soil with sandy loam and sandy clay loam are 18.07%and 25.12%,respectively,while those of non cultivated soil are 5.85%and 3.29%,respectively.The variability of cultivated soil is greater than that of non cultivated soil.Under different measurement methods,the variability of sandy loam and sandy clay loam measured in indoor undisturbed experiment is 14.20%and 16.30%,respectively,while in field in-situ experiments are 32.73%and 35.37%,respectively,with stronger variability.The variability of soil saturated permeability coefficient is affected by soil physical parameters,soil texture,sedimentary environment,land use pattern,determination method and other factors.Random factors such as land use have a stronger control effect on the variability of soil saturated permeability coefficient.

关 键 词：江汉平原 地统计学 土壤物性 饱和渗透系数 空间变异 

分 类 号：P642.1[天文地球—工程地质学] S152.72[天文地球—地质矿产勘探]