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Evaluation of Karst Soil Erosion and Nutrient Loss Based on RUSLE Model in Guizhou Province TEXT SIZE: A A A
Based on GIS technology and RUSLE model, the spatial variation characteristics of soil erosion were analyzed in karst areas, and the relationship between soil erosion and soil nutrient loss was discussed. The results showed that the soil differences in spatial variation between nutrient losses. The results illustrate the total soil erosion in is 10316.31 X 104t. a-1, accounting for 84.95% of the total land area in Guizhou Province. The spatial distribution of soil erosion showing the characteristics of the southeast to the northwest strip. The annual average soil erosion modulu is 691.94 t . km-2 . a-1, of which karst is 720.28t . km-2 . a-1 and non-karst is 689.53 t . km-2 . a-1. The total nutrient losses such as soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP) and total potassium (TK) were 596.72 X 104t . a-1 due to soil erosion, and SOC, TN and TP and TK were 38.13, 1.61, 0.41 and 14.70t . km-2 . a-1, respectively. The average amount of loss and total loss are the largest in non-karst, and four kinds of nutrient is the smallest in karst gorge. The spatial variation of soil erosion in the study area is the process of increasing the erosion area with the increase of the erosion rate, and the difference of the spatial distribution of soil erosion determines the spatial distribution of soil nutrient loss.
 

Publication name

 2017 3RD INTERNATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND MATERIAL APPLICATION (ESMA2017), VOLS 1-4, 108 10.1088/1755-1315/108/3/032014 2018
 Book Series: IOP Conference Series-Earth and Environmental Science

Author(s)

 Zeng, Cheng; Li, Yangbing; Bai, Xiaoyong; Luo, Guangjie

Corresponding author(s) 

 BAI Xiaoyong 
 baixiaoyong@126.com 
 1. Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng West Rd, Guiyang 550081, Guizhou, Peoples R China
2. Chinese Acad Sci, Puding Karst Ecosyst Observat & Res Stn, Puding 562100, Guizhou, Peoples R China

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