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[1]LIU Tongkai,CHEN Yuanzhe,DONG Tianxiang.Evaluation of Restoration Effect of Soil Conservation Function in Disaster Area Based on GIS/RS[J].Research of Soil and Water Conservation,2019,26(02):78-85.

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Evaluation of Restoration Effect of Soil Conservation Function in Disaster Area Based on GIS/RS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 78-85 Column: Public date: 2019-04-28

Title:: Evaluation of Restoration Effect of Soil Conservation Function in Disaster Area Based on GIS/RS

Author(s):: LIU Tongkai¹, CHEN Yuanzhe², DONG Tianxiang¹; 1. College of Applied Meteorology, Nanjin University of Information Science and Technology, Nanjing 210044, China;
2. Meteorological Bureau of Yunan County in Guangdong, Yunan, Guangdong 527199, China

Keywords:: remote sensing; soil conservation; spatial modeling; restoration effect; universal soil loss equation

CLC:: S157.1

DOI:: -

Abstract:: Soil erosion is the fundamental cause of land degradation, and is also an important factor that causes the deterioration of the ecological environment. With the occurrence of earthquake and other major geological disasters, the soil conservation function of the disaster areas has been seriously damaged. Therefore, it is of great significance to evaluate the restoration effect of soil conservation function in earthquake stricken areas. We selected ‘5·12’ Wenchuan earthquake extremely heavy disaster area as the research area, and took the Landsat5 TM data and DEM data in the 2007, 2009, 2011 research area as the main data source, combined the other data of rainfall information and other data, used the revised universal soil loss equation, and used ArcGIS software as the platform to establish the evaluation model of the restoration effect of the soil conservation function in the disaster area. The results showed that the average soil erosion modulus was 3 389.57 t/(hm²·a) in 2007, the annual total erosion amount was 8.75×10⁷t, the soil erosion modulus increased by 64.64% in 2009, the average was 5 580.60 t/(hm²·a), the annual total erosion amount was 1.44×10⁸ t; compared with the parameters in 2009, the soil erosion modulus decreased by 24.08%, the annual erosion amount was 1.09×10⁸ t, and the soil retention function was restored in 2010. From the aspects of the soil erosion area and the soil erosion modulus, the soil conservation function of the disaster area had also reached a certain recovery. In addition, the closer to the earthquake center, the more weakened the soil conservation function is, the worse the recovery capacity of the soil is. Therefore, it is suggested that the relevant departments should focus on strengthening the change of the epicenter and its surrounding areas in the work of post disaster reconstruction.

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