Volume No. 6 Issue No.: 3 Page No.: 487-493 Jan-Mar 2012

 

EVALUATION OF IMPACTS OF SPATIAL LAND USE CHANGES ON SOIL LOSS USING REMOTE SENSING AND GIS IN HUAY SAI ROYAL DEVELOPMENT CENTER, THAILAND

 

Saowanee Wijitkosum

Environmental Research Institute Chulalongkorn University, Bangkok (THAILAND)

 

Received on : October 5, 2011

 

ABSTRACT

 

By using two period remote sensing images and with the support of GIS and RS, spatial pattern of land use change of Huay Sai Royal Development Centre, Thailand in recent 10 years is interpreted and extracted, and elucidated that human activities are the driving force for changes of cultivated land. The impacts of land use changes on soil loss have been assessed by applying the Universal Soil Loss Equation (USLE). The change of land use types in the study area over the period of 2000 - 2010 was investigated by applying remote sensing technique and field survey for interpreting the satellite image taken by Lansat-5 TM. The study revealed that the change of land use types over 2000 - 2010 period affect the protective function of the land. The increase of forest area and the decrease of opened land led to the reduction of soil loss risk by raising the protective function of the land. During 2000 to 2010, the area with soil loss more than 125 Mg ha-1 per year decreased obviously from 44.12% to 0.19% of the total area.

 

Keywords : Relative land use change, Soil loss, Universal soil loss equation, Huay Sai Royal Development Centre, Land

 

 

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