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Karst Bare Slope Soil Erosion and Soil Quality: a Simulation Case Study : Volume 7, Issue 2 (05/06/2015)

By Dai, Q.

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Book Id: WPLBN0004022050
Format Type: PDF Article :
File Size: Pages 33
Reproduction Date: 2015

Title: Karst Bare Slope Soil Erosion and Soil Quality: a Simulation Case Study : Volume 7, Issue 2 (05/06/2015)  
Author: Dai, Q.
Volume: Vol. 7, Issue 2
Language: English
Subject: Science, Solid, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Yang, Z., Shao, H., Liu, Z., & Dai, Q. (2015). Karst Bare Slope Soil Erosion and Soil Quality: a Simulation Case Study : Volume 7, Issue 2 (05/06/2015). Retrieved from http://worldebookfair.com/


Description
Description: Forestry College of Guizhou University, Guiyang 550025, China. The influence on soil erosion by different bedrock bareness ratios, different rainfall intensities, different underground pore fissure degrees and rainfall duration are researched through manual simulation of microrelief characteristics of karst bare slopes and underground karst crack construction in combination with artificial simulation of rainfall experiment. The results show that firstly, when the rainfall intensity is small (30 and 50 mm h−1), no bottom load loss is produced on the surface, and surface and underground runoff and sediment production is increased with the increasing of rainfall intensity; secondly, surface runoff and sediment production reduced with increased underground pore fissure degree, while underground runoff and sediment production increased; thirdly, raindrops hit the surface, forming a crust with rainfall duration. The formation of crusts increases surface runoff erosion and reduces soil infiltration rate. Increasing of surface runoff erosion damaged crust and increased soil seepage rate. Raindrops continued to hit the surface, leading the formation of crust. Soil permeability showed volatility which were from reduction to increases and reduction, and so on. Surface and subsurface runoff were volatility with rainfall duration; fourthly, when rock bareness ratio is 50% and rainfall intensities are 30 and 50 mm h−1, runoff is not produced on the surface, and the slope runoff and sediment production presents a fluctuating change with increased rock bareness ratio; fifthly, the correlation degree between the slope runoff and sediment production and all factors are as follows: rainfall intensity > rainfall duration > underground pore fissure degree > bed rock bareness ratio.

Summary
Karst bare slope soil erosion and soil quality: a simulation case study

Excerpt
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