Soil erosion evolution and spatial correlation analysis in a typical karst geomorphology using RUSLE with GIS
-
Published:2017-07-03
Issue:4
Volume:8
Page:721-736
-
ISSN:1869-9529
-
Container-title:Solid Earth
-
language:en
-
Short-container-title:Solid Earth
Author:
Zeng Cheng,Wang Shijie,Bai Xiaoyong,Li Yangbing,Tian Yichao,Li Yue,Wu Luhua,Luo Guangjie
Abstract
Abstract. Although some scholars have studied soil erosion in karst landforms, analyses of the spatial and temporal evolution of soil erosion and correlation analyses with spatial elements have been insufficient. The lack of research has led to an inaccurate assessment of environmental effects, especially in the mountainous area of Wuling in China. Soil erosion and rocky desertification in this area influence the survival and sustainability of a population of 0.22 billion people. This paper analyzes the spatiotemporal evolution of soil erosion and explores its relationship with rocky desertification using GIS technology and the revised universal soil loss equation (RUSLE). Furthermore, this paper analyzes the relationship between soil erosion and major natural elements in southern China. The results are as follows: (1) from 2000 to 2013, the proportion of the area experiencing micro-erosion and mild erosion was at increasing risk in contrast to areas where moderate and high erosion are decreasing. The area changes in this time sequence reflect moderate to high levels of erosion tending to convert into micro-erosion and mild erosion. (2) The soil erosion area on the slope, at 15–35°, accounted for 60.59 % of the total erosion area, and the corresponding soil erosion accounted for 40.44 %. (3) The annual erosion rate in the karst region decreased much faster than in the non-karst region. Soil erosion in all of the rock outcrop areas indicates an improving trend, and dynamic changes in soil erosion significantly differ among the various lithological distribution belts. (4) The soil erosion rate decreased in the rocky desertification regions, to below moderate levels, but increased in the severe rocky desertification areas. The temporal and spatial variations in soil erosion gradually decreased in the study area. Differences in the spatial distribution between lithology and rocky desertification induced extensive soil loss. As rocky desertification became worse, the erosion modulus decreased and the decreasing rate of annual erosion slowed.
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Earth-Surface Processes,Geochemistry and Petrology,Geology,Geophysics,Soil Science
Reference52 articles.
1. Arnhold, S., Lindner, S., Lee, B., Martin, E., Kettering, J., and Nguyen, T. T.: Conventional and organic farming: soil erosion and conservation potential for row crop cultivation, Geoderma, 219–220, 89–105, https://doi.org/10.1016/j.geoderma.2013.12.023, 2014. 2. Bai, X. Y., Zhang, X. B., Long, Y., Liu, X., and Zhang, S.: Use of 137cs and 210pb ex, measurements on deposits in a karst depression to study the erosional response of a small karst catchment in southwest china to land-use change, Hydrol. Process., 27, 822–829, https://doi.org/10.1002/hyp.9530, 2013a. 3. Bai, X. Y., Wang, S. J., and Xiong, K. N.: Assessing spatial-temporal evolution processes of karst rocky desertification land: indications for restoration strategies, Land Degrad. Dev., 24, 47–56, https://doi.org/10.1002/ldr.1102, 2013b. 4. Bai, Z. G. and Wan, G. J.: Study on watershed erosion rate and its environmental effects in Guizhou Karst region, Journal of Soil Erosion and Soil and Water Conservation, 4, 1–7, 1998. 5. Biswas, S. S. and Pani, P.: Estimation of soil erosion using rusle and gis techniques: a case study of barakar river basin, jharkhand, india, Modeling Earth Systems and Environment, 1, 1–13, https://doi.org/10.1007/s40808-015-0040-3, 2015.
Cited by
83 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|