Abstract:
Chanthaburi province is influenced by the South-west monsoon. This climate condition has resulted in heavy precipitation, so soil erosion problem is prevalent in this area. In this study, the Geographic Information System (GIS) and the Universal Soil Loss Equation (USLE) were applied to assess risky area op soil erosion due to flooding catastrophe at Khao Kichakud, Chanthaburi province. The program Cadcorp SIS Spatial Information System Version 5.2 was applied.The results showed that within 360,000 rais of the study area, 312,632.9 rais had average soil loss of 0.9 ton/rai/yr and were classified as very slight level of erosion (the chance of total volume soil erosion 0-2 ton/rai/yr). The were 29,066. rais that showed average soil loss of 4.6 ton/rai/yr and classified as slight level of erosion (the chance of total volume soil erosion 2-5 ton/rai/yr). There were 16,138.8 rai with average soil loss of 14.7 ton/rai/yr and were classified as moderate level of erosion (the chance of total volume soil erosion 5-15 ton/rai/yr). There were 2,031.6 rais with average soil loss of 19.6 ton/rai/yr and were classified as server level of of erosion (the chance of total soil erosion volume 15-20 ton/rai/yr). And 129.9 rais with average soil loss of 96.8 ton/rai/yr and were classified as very severe level of erosion (the chance of total volume soil loss more 20 ton/rai/yr).