IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
青藏高原高寒草甸区土壤水分的空间异质性
Alternative TitleSpatial heterogeneity of soil moisture in alpine meadow area of the Qinghai-Xizang Plateau
李元寿1; 王根绪1,2; 丁永建1; 王一博3; 赵林1; 张春敏3
Corresponding Author李元寿
2008
Source Publication水科学进展
ISSN1001-6791
Volume19Issue:1Pages:61-67
Abstract

通过网格(10m*10m)取样,用地统计学方法研究了青藏高原高寒草甸覆盖区域(110m*90m)浅层剖面(0-40cm)土壤水分的空间异质性特征。结果表明:在高寒草甸覆盖区0-30cm深度范围内,土壤水分均存在高度空间异质性,其中87.3%-74.9%的空间异质性是由空间自相关部分引起的,主要体现在201m以下尺度,10m以下随机因素对空间异质性作用较小;30-40cm土壤水分空间异质性由10m以下尺度随机因素导致的占42.3%,而自相关部分的空间异质性(57.7%)体现在10-87.2m尺度。随土层深度的增加,分维数D有逐渐增大的趋势,说明随深度增加高寒草甸区土壤水分自相关空间异质性程度在降低,而随机因素导致的空间异质性程度在增加。从4层的C_o/(C+C_o)值来看,10-20cm这一层的值最小,表明在这一层的系统变量的空间自相关性程度最高。说明高寒草甸区0-30cm土层的土壤水分含量是受降水、植被发育、根系分布、土壤特性和人为干扰等影响,其空间异质性主要受自相关因素控制,而30cm以下的土壤水分受自相关因素和随机因素共同控制。

Other Abstract

In this paper geo-statistical theory and methods are used to study the spatial heterogeneity o teristics in shallow profile (0 - 40 cm) of alpine meadow areas (110 m - 90 m) in the Qinghai-Xizang f soil moisture charac- Plateau. The 352 sam- pling points are fixed in total Using the grid sampling method (10 m * 10 m space) .The results show that in alpine meadows 0 - 30 cm depth of coverage area, there is a high degree of spatial heterogeneity of soil moisture. Within 87.3% - 74.9% spa- tial heterogeneity, part of the spatial autocorrelation is at 0 - 30 cm depth. The auto-correlation factors at 10 - 201 m scale play an important role in the 0 - 30 cm soil moisture spatial heterogeneity. But spatial heterogeneity of soil moisture at the layer of 30 - 40 cm depth can be controlled by the random and auto-correlation factors. With the increase of depth the fractal dimen- sion D has a gradually increasing trend. The worthy noting is that the random factor will increase at soil depth for soil moisture spatial heterogeneity. From the C_o/( C + C_o) comparable values of soil four layers, the minimum value is in the lowest level of this 10 - 20 cm, the level of system variables is shown in the highest degree of spatial autocorrelation. Soil moisture content of the layer 0 - 30 cm of alpine meadows area is affected by precipitation, vegetation growth, root distribution, soil characteristics and impacts of human interference et al.

Keyword青藏高原 高寒草甸 地统计学 土壤水分 空间异质性
Subject AreaP334.91
DOI10.14042/j.cnki.32.1309.2008.01.007
Indexed ByEI ; CSCD ; 北大中文核心
Language中文
CSCD IDCSCD:3254514
Funding Organization国家重点基础研究发展计划(973)资助项目(2007CB411504) ; 国家自然科学基金资助项目(40701022,90511003,40730634) ; 中国科学院成都山地灾害与环境研究所2004年“百人计划”项目 ; 冰冻圈科学国家重点实验室开放基金(SKLCS07-06) ; 冻土工程国家重点实验室开放基金(SKLFSE200501)
Accession numberAccession number:20081911244952
Citation statistics
Cited Times:55[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18449
Collection成都山地所知识仓储(2009年以前)
山地表生过程与生态调控重点实验室
Affiliation1.中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室青藏高原冰冻圈观测试验站冻土工程国家重点实验室
2.中国科学院水利部成都山地灾害与环境研究所
3.兰州大学资源与环境学院
Recommended Citation
GB/T 7714
李元寿,王根绪,丁永建,等. 青藏高原高寒草甸区土壤水分的空间异质性[J]. 水科学进展,2008,19(1):61-67.
APA 李元寿,王根绪,丁永建,王一博,赵林,&张春敏.(2008).青藏高原高寒草甸区土壤水分的空间异质性.水科学进展,19(1),61-67.
MLA 李元寿,et al."青藏高原高寒草甸区土壤水分的空间异质性".水科学进展 19.1(2008):61-67.
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