[1]张春敏,王根绪,王军德,等.高寒草甸典型小流域雨后土壤水分空间变异特征[J].水土保持研究,2007,14(06):10-13,50.
　ZHANG Chun-min,WANG Gen-xu,WANG Jun-de,et al.The Spatial Heterogeneity of Soil Moisture after Raining in Representative Gully Catchment of the Alpine Meadow[J].Research of Soil and Water Conservation,2007,14(06):10-13,50.
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高寒草甸典型小流域雨后土壤水分空间变异特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 14 期数: 2007年06期 页码: 10-13,50 栏目: 出版日期: 1900-01-01
Title:
The Spatial Heterogeneity of Soil Moisture after Raining in Representative Gully Catchment of the Alpine Meadow
作者:
张春敏1, 王根绪1,2, 王军德1, 龙训建1
1. 兰州大学 资源环境学院, 兰州 730000;
2. 中国科学院 山地灾害与环境研究所, 成都 610041
Author(s):
ZHANG Chun-min1, WANG Gen-xu1,2, WANG Jun-de1, LONG Xun-jian1
1. College of Resourece and Environmental Science, Lanzhou University, Lanzhou 730000, China;
2. Institute of Mountain Hazards and Environment, CAREERI CAS, Chengdu 610041, China
关键词:
高寒草甸; 土壤水分; Kriging插值; 空间变异
Keywords:
alpine meadow; soil moisture; Kriging interpolation; spatial heterogeneity
分类号:
S152.7
摘要:
利用地统计学的Kriging空间内插法研究寒区典型小流域雨后土壤水分空间变异及分布情况；分析0-50 cm土壤层的平均土壤水分与剖面土壤水分的空间分布特征。结果表明：0-10，10-20，20-30，30-40，40-50 cm 5层土壤水分和流域平均土壤水分最佳拟合模型为球状模型；在小流域尺度范围内，5层土壤水分具有中等空间变异性，其块金系数为43.7%，58.9%，53.0%，71.6%和68.1%，流域平均土壤水分的块金系数为38.4%，0-10，10-20，20-30 cm 3层土壤水分相关度明显小于30-40 cm和40-50 cm两土层土壤水分，说明表层土壤水分受降雨因素干扰明显，而深层土壤含水量相关性比较稳定。通过分析，得出雨后流域土壤水分空间分布主要受水分入渗、地形、植被覆盖、海拔等因素的影响。利用半方差函数分析得出流域土壤水分的有效变程在938～1 469 m，40-50 cm土层土壤水分变程最大，为1 469 m；10-20 cm土层土壤水分变程最小为938 m。通过确定半方差函数、比较变量的空间变异性及空间变异程度，得出在小流域内土壤水分半方差函数模型总体上拟合效果较好。
Abstract:
Using a typical case of small watershed in an alpine meadow, this paper studied the spatial heterogeneity of soil moisture after raining using GIS software and the Kriging interpolation method.The results for soil moisture modeling are as follows:the optimal model for the soil layer 0-10, 10-20, 20-30, 30-40 and 40-50 cm below the surface are spherical.The results for spatial heterogeneity are as follows:within the watershed, the five soil layers within 0-50 cm below the surface and the mean soil moisture have moderate spatial heterogeneity.The nugget coefficient are 43.7%, 58.9%, 53.0%, 71.6%, 68.1% and 38.4%, respectively.Furthermore, the Simi-variance function and Kriging interpolation map of soil moisture both indicated spatial structure characteristics well.The ranges of the five layers were 1 375, 938, 1 428, 1 313 and 1 469 m, respectively.The soil layer within 40-50 cm had the maximum range, and the layer within 10-20 cm had the minimum range.

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备注/Memo

收稿日期:2007-2-1。
基金项目:国家自然科学基金项目（90511003）；中国科学院知识创新工程重点项目（KZCX1-SW-04）资助
作者简介:张春敏（1983- ），男（土家族），重庆人，硕士研究生，主要从事寒区水文水资源研究。

更新日期/Last Update: 1900-01-01