Abstract
Soil loss due to surface erosion has been a global problem not just for developing countries but also for developed countries. One of the factors that have greatest impact on soil erosion is land cover. The purpose of this study is to estimate the long-term average annual soil erosion in the Lam Phra Phloeng watershed, Nakhon Ratchasima, Thailand with different source of land cover by using the Universal Soil Loss Equation (USLE) and GIS (30 m grid cells) to calculate the six erosion factors (R, K, L, S, C, and P) of USLE. Land use data are from Land Development Department (LDD) and ESA Climate Change Initiative (ESA/CCI) in 2015. The result of this study show that mean soil erosion by using land cover from ESA/CCI is less than LDD (29.16 and 64.29 ton/ha/year respectively) because soil erosion mostly occurred in the agricultural field and LDD is a local department that survey land use in Thailand thus land cover data from this department have more details than ESA/CCI.
Highlights
Nowadays many global problems are caused from climate change and human activities
One of the most important factors is the coverage and management (C) this study aims to evaluate soil erosion in Lam Phra Phloeng watershed by Universal Soil Loss Equation (USLE) with different sources of land cover data; one is from Land Development Department (LDD) and another one is from ESA Climate Change Initiative (ESA/CCI)
4.1 Assessment of land use on soil erosion in Lam Phra Phloeng watershed by USLE model The soil erosion map resulting from spatial overlay of the factor layers with the USLE model in Lam Phra Ploeng watershed is presented in Fig. 3 and Table
Summary
Nowadays many global problems are caused from climate change and human activities. There are several variables that affect soil erosion such as water, soil type, human activity and so on. In the past three decades, rapid increases in human developments have caused some significant environmental problems, such as deforestation and slope mass movement in every place in Thailand. There is a department in Thailand called Land Development Department (LDD) that studies about soil erosion [3]. They published a table and data for evaluating soil erosion with Universal Soil Loss Equation (USLE) [4] for every region of Thailand [3] because they recognized the importance of soil erosion
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