IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleInfluence factors of morphological development of soil cracks in degraded slopes in Yuanmou dry-hot valley region
熊东红1,2; 杨丹1,2,3; 李佳佳1,2; 苏正安1,2; 董一帆1,2; 翟娟4
Corresponding Author熊东红
Source Publication农业工程学报
Other AbstractSoil cracking is an important process and feature of the slope degradation in Yuanmou Dry-hot Valley Region, which influences water evaporation, solutes transport and soil structure. In this paper, 25 soil crack quads were investigated by using the photography method to describe the morphology of soil cracks, and meanwhile, soil samples were also obtained at soil depth 0-30 cm and >30-60 cm in the same quad. The crack area density (Dc) was obtained by ArcGIS 9.0. The values for soil physico-chemical properties were also obtained by laboratory analysis. And then, the influences of soil physico-chemical properties on the development degrees of soil cracks were analyzed by application of statistical analysis methods. The Results indicate that: (1) The development degrees of soil cracks have a positive correlation with clay content, swell-shrink property and bulk density, and are negatively correlated to organic content and soil porosity. Dc, which is the quantitative indicator for the development degrees of soil cracks has been found to have a significant strong correlation with clay content, their coefficients were 0.97 and 0.95 for 0-30 cm layer and for >30-60 cm layer respectively. And for Dc and bulk density, their relationship also appears significant positively correlated, witch was 0.81 and 0.68 for 0-30 cm and >30-60 cm layer respectively. Dc and swell-shrink property has the same correlation with its coefficient of 0.81. However, as for Dc and organic content, Dc and soil porosity, the correlations were found to be negatively correlated with coefficients of -0.55 and -0.72 for the layer of 0-30 cm. On the basis of that, each regression equation for Dc and other influential factors are given by application of the regression analysis. (2) The soil structural indices (including bulk density, soil porosity and clay content) are the most important factors affecting the development degrees of soil cracks, then followed with swell-shrink property and organic content. Principal component analysis shows that among the 9 principle components, the principle component 1 (PC1), principle component 2 (PC2) and principle component 3 (PC3) are able to explain most of the variance information with their accumulative contribution of 94.98%. And PC1 is the structural factor mainly consists of soil bulk density, soil clay content and soil porosity. PC2 and PC3 mainly reflect soil organic matter and soil swell-shrinkage property. The research results can be expected to provide theoretical references for the further study on soil cracking mechanism and for proposing reasonable measurements on amelioration of cracked soil.
Keyword土壤 水分 溶质运移 形态发育 影响因子 元谋干热河谷
Subject AreaS152.4
Indexed ByEI ; CSCD
Funding Organization国家自然科学基金项目(40901009) ; 中国科学院知识创新工程重要方向项目(KZCXZ-EW-QN317) ; 中国科学院水利部成都山地灾害与环境研究所“青年百人团队”项目(SDSQB-2011-01) ; 中国科学院“西部之光”人才培养计划“西部博士资助项目”
Accession numberAccession number:20131016077785
Citation statistics
Cited Times:19[CSCD]   [CSCD Record]
Document Type期刊论文
Affiliation1.中国科学院山地灾害与地表过程重点实验室,成都 610041;
2.中国科学院 水利部 成都山地灾害与环境研究所,成都 610041;
3.中国科学院研究生院,北京 100049;
4.成都信息工程学院,成都 610225
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
熊东红,杨丹,李佳佳,等. 元谋干热河谷区退化坡地土壤裂缝形态发育的影响因子[J]. 农业工程学报,2013,29(1):102-109.
APA 熊东红,杨丹,李佳佳,苏正安,董一帆,&翟娟.(2013).元谋干热河谷区退化坡地土壤裂缝形态发育的影响因子.农业工程学报,29(1),102-109.
MLA 熊东红,et al."元谋干热河谷区退化坡地土壤裂缝形态发育的影响因子".农业工程学报 29.1(2013):102-109.
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