测定尺度对所测土壤导水参数及其空间变异性的影响

被引：14

作者：

薛绪掌

张仁铎

桂胜祥

机构：

[1] 中国农业大学!北京

[2] UniversityofWyoming!Laramie

[3] WY

[4] USA

来源：

水土保持通报 | 2001年 / 03期

基金：

美国农业部;

关键词：

测定尺度; 土壤导水参数; 空间变异;

D O I：

10.13961/j.cnki.stbctb.2001.03.017

中图分类号：

S152.71 [];

学科分类号：

摘要：

用 3种盘径 (14.4,2 0 ,30cm)的负压入渗仪在 2个供水负压 (1和 10cm)下 ,在 65个测点测定了田间水分入渗。基于入渗数据 ,计算了宏观毛管上升高度和 2个基模吸力的导水率。导水率和宏观毛管上升高度的值呈对数正态分布。用大盘径负压入渗仪测定获得的导水率和宏观毛管上升高度的空间连续性最好。当供水负压为 1cm ,盘径为 14.4cm(小盘径 ) ,导水率和宏观毛管上升高度的空间连续性没有表现出来。导水率的均值随测定尺度增加而趋于减少 ,宏观毛管上升高度的均值和标准偏差均随测定尺度增加而趋于减小。导水率和宏观毛管上升高度的样本半方差 ,半方差金砖方差 (nugget)和平台方差 (sill)随测定尺度增加而减少

引用

页码：47 / 51

页数：5

共 20 条

[1]

Predicting saturated hydraulic conductivity utilizing fractal principles. Rawls W J,Brakensiek D L,Logsdon S D. Soil Science Society of America Journal . 1993

[2]

Spatial analysis of hydraulic conductivity measured using disc infiltrometers. Mohanty B P,Ankeny M D,Horton R,Kanwar R S. Water Resources Research . 1994

[3]

Upscaling of hydraulic conductivity in partially saturated heterogeneous porous formation. Russo D. Water Resources Research . 1992

[4]

A theoretical approach to the areal distribution of soil surface conductivity. Horowitz J,Hillel D. Soil Science . 1987

[5]

Scaling properties of saturated hydraulic conductivity in soil. Gimenez D,Rawls W J,Lauren J G. Geoderma . 1999

[6]

Measurement and interpretation of spatially variable leaching processes. Wagenet R J. In: Soil spatial variability. Proc. Soil Spatial Variability Wkshop. Las Vegas,Nev. 30 Nov. - 1 Dec. 1984. J. Bouma and D. R.Nielsen ( eds. ) Int. Soil Sci. Soc. and Soil Sci. Soc.Am. PUDOC, Wageningen . 1985

[7]

Upscaling of conductivity of heterogeneous formations: General approach and application to isotropic media[J] . Peter Indelman,Gedeon Dagan. &nbspTransport in Porous Media . 1993 (2)

[8] THE LOGNORMAL APPROACH TO PREDICTING LOCAL DISTRIBUTIONS OF SELECTIVE MINING UNIT GRADES [J].

JOURNEL, AG .

JOURNAL OF THE INTERNATIONAL ASSOCIATION FOR MATHEMATICAL GEOLOGY, 1980, 12 (04) :285-303

[9]

Analysis of the spatial structure of properties of selected aquifers. Hoeksema R J,Kitanidis P K. Water Resources Research . 1985

[10]

Infiltration, macroporosity,and mesoporosity distribution on two forested watersheds. Wilson G V,Luxmoore R J. Soil Science Society of America Journal . 1988

← 1 2 →