IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2016  > Vol13 No.5
An evaluationon using soil aggregate stability as the indicator of interrill erodibility
DING Wen-feng; ZHANG Xun-chang
Corresponding AuthorDING Wen-feng
Source PublicationJournal of Mountain Science
AbstractAggregate stability is a very important predictor of soil structure and strength, which influences soil erodibility. Several aggregate stability indices were selected for estimating interrill erodibility of four soil types with contrasting properties from temperate and subtropical regions of China. This study was conducted to investigate how closely the soil interrill erodibility factor in the Water Erosion Prediction Project (WEPP) model relates to soil aggregate stability. The mass fractal dimension (FD), geometric mean diameter (GMD), mean weight diameter (MWD), and aggregate stability index (ASI) of soil aggregates were calculated. A rainfall simulator with a drainable flume (3.0 m long ×1.0 m wide ×0.5 m deep) was used at four slope gradients (5°, 10°,15° and 20°), and four rainfall intensities (0.6, 1.1, 1.7 and 2.5 mm/min). Results indicated that the interrill erodibility (Ki) values were significantly correlated to the indices of ASI, MWD, GMD, and FD computed from the aggregate wet-sieve data. The Ki had a strong positive correlation with FD, as well as a strong negative correlation with ASI, GMD, and MWD. Soils with a higher aggregate stability and lower fractal dimension have smaller Ki values. Stable soils were characterized by a high percentage of large aggregates and the erodible soils by a high percentage of smaller aggregates. The correlation coefficients of Ki with ASI and GMD were greater than those with FD and MWD, implying that both the ASI and GMD may be better alternative parameters for empirically predicting the soil Ki factor.ASI and GMD are more reasonable in interrill soil erodibility estimation, compared with Ki calculation in original WEPP model equation. Results demonstrate the validation of soil aggregation characterization as an appropriate indicator of soil susceptibility to erosion in contrasting soil types in China.
KeywordSoil Erodibility Interrill Aggregate Stability Soil Erosion
Indexed BySCI
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.5
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GB/T 7714
DING Wen-feng,ZHANG Xun-chang. An evaluationon using soil aggregate stability as the indicator of interrill erodibility[J]. Journal of Mountain Science,2016,13(5):831-843.
APA DING Wen-feng,&ZHANG Xun-chang.(2016).An evaluationon using soil aggregate stability as the indicator of interrill erodibility.Journal of Mountain Science,13(5),831-843.
MLA DING Wen-feng,et al."An evaluationon using soil aggregate stability as the indicator of interrill erodibility".Journal of Mountain Science 13.5(2016):831-843.
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