IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
黄河源区不同植被类型覆盖下季节冻土冻融过程中的土壤温湿空间变化
Alternative TitleVariations of soil temperature and water moisture of seasonal frozen soil with different vegetation coverages in the source region of the Yellow River, China
程慧艳1,3; 王根绪2,3; 王一博3; 胡宏昌3
Corresponding Author程慧艳
2008
Source Publication兰州大学学报(自然科学版)
ISSN0455-2059
Volume44Issue:2Pages:15-21
Other Abstract

摘要:在对不同植被覆盖度(95%,70%~80%,40%~50%和10%)下的土壤水分(thetaV)和土壤温度(T_s)进行日观测的基础上,研究了冻融过程中植被覆盖变化对土壤水分分布和温度的影响.土壤温度与水分关系的回归分析表明:土壤冻融过程明显受植被覆盖变化的影响,植被覆盖变化还导致土壤水分和温度的耦合变化.使用了一个土壤水分和温度的耦合模型来研究植被覆盖的影响,结果证明了这一方法的有效性.结果表明:土壤水分对土壤温度的变化范围和幅度都有影响,高盖度下的土壤比低盖度土壤持水性强.此外,在冻结过程中,由于水的热容量大于土壤的,高盖度土壤能够抑制土壤温度的降低幅度,高盖度土壤具有较好的绝热功能.对于黄河源区不同植被类型覆盖下季节冻土冻融过程中的土壤温湿空间变化研究有利于为高寒冻土地区冻土和生态环境的保护及合理利用提供科学依据.

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The impact of shifTs in vegetation cover on the coupling of soil water and temperature was assessed. Soil moisture (thetav) and soil temperature(T_s) were monitored on a daily basis. MeasuremenTs were made under different vegetation coverages (95%, 70%-80%, 40%-50% and 10%) and on both thawed and frozen soils. The regression analysis of thetav vs. Ts ploTs indicated that soil freezing and thawing processes were significantly affected by changes in vegetation coverage, which also caused variations in thetav-T_s coupling. A thetav-T_s coupling model was developed in order to account for the influence of vegetation coverage. It was observed that the moisture in soil affected both the scope and trend in the soil temperature. The soil with a higher coverage held more water content than that with a lower coverage. Moreover, in the process of freezing, the trend of the reduction in the soil temperature would be blocked because the thermal capacity of water is bigger than that of soil. The soil with high vegetation coverage also functioned better for the purpose of heat-insulating. It may thus play an important role for frozen soil and environmental protection and for more effective uses of the frozen soil.

Keyword土壤温度和水分 植被覆盖 黄河源区 水分温度耦合变化模型
Subject AreaP642.14
DOI10.13885/j.issn.0455-2059.2008.02.023
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:3296504
Funding Organization国家自然科学基金重大研究计划(90511003)
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18466
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.兰州理工大学石油化工学院
2.中国科学院水利部成都山地灾害与环境研究所
3.兰州大学资源环境学院
Recommended Citation
GB/T 7714
程慧艳,王根绪,王一博,等. 黄河源区不同植被类型覆盖下季节冻土冻融过程中的土壤温湿空间变化[J]. 兰州大学学报(自然科学版),2008,44(2):15-21.
APA 程慧艳,王根绪,王一博,&胡宏昌.(2008).黄河源区不同植被类型覆盖下季节冻土冻融过程中的土壤温湿空间变化.兰州大学学报(自然科学版),44(2),15-21.
MLA 程慧艳,et al."黄河源区不同植被类型覆盖下季节冻土冻融过程中的土壤温湿空间变化".兰州大学学报(自然科学版) 44.2(2008):15-21.
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