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Open AccessArticle

Spatial and Temporal Evolution of the Infiltration Characteristics of a Loess Landslide

1
College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
2
Institute of Earth Surface System and Hazards, Northwest University, Xi’an 710127, China
3
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Northwest University, Xi’an 710127, China
*
Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2020, 9(1), 26; https://doi.org/10.3390/ijgi9010026
Received: 11 November 2019 / Revised: 10 December 2019 / Accepted: 18 December 2019 / Published: 2 January 2020
(This article belongs to the Special Issue Geospatial Approaches to Landslide Mapping and Monitoring)
Infiltration plays an important role in influencing slope stability. However, the influences of slope failure on infiltration and the evolution of infiltration over time and space remain unclear. We studied and compared the infiltration rates in undisturbed loess and disturbed loess in different years and at different sites on loess landslide bodies. The results showed that the average initial infiltration rate in a new landslide body (triggered on 11 October 2017) were dramatically higher than those in a previous landslide body (triggered on 17 September 2011) and that the infiltration rates of both landslide types were higher than the rate of undisturbed loess. The initial infiltration rate in the new landslide body sharply decreased over the 4–5 months following the landslide because of the appearance of physical crusts. Our observations indicated that the infiltration rate of the disturbed soil in a landslide evolved over time and that the infiltration rate gradually approached that of undisturbed loess. Furthermore, in the undisturbed loess, both the initial and quasi-steady infiltration rates were slightly higher in the loess than in the paleosol, and in the previous landslide body, the infiltration rate was highest in the upper part, intermediate in the middle part, and lowest in the lower part. This study can help us to better understand the evolution process of infiltration in undisturbed loess, previous landslides, and new landslides. View Full-Text
Keywords: landslides; infiltration; loess; disturbed loess; physical crusts landslides; infiltration; loess; disturbed loess; physical crusts
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Yang, D.; Qiu, H.; Pei, Y.; Hu, S.; Ma, S.; Liu, Z.; Zhang, Y.; Cao, M. Spatial and Temporal Evolution of the Infiltration Characteristics of a Loess Landslide. ISPRS Int. J. Geo-Inf. 2020, 9, 26.

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