ESTIMATION OF SOIL LOSS RATE IN PHETCHABURI WATERSHED AREA WITH GEO-INFORMATION TECHNOLOGY
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Abstract
The purpose of this research was to estimate soil loss rates in the Phetchaburi River Basin using universal soil loss equations and geospatial technology covering 2 seasons: the rainy season from May to October 2021 and the winter season from November 2021. 2021 to January 2022. The factors used to estimate the soil loss rate are Rain erosion (R-Factor), Soil persistence (K-Factor), Slope length (L-Factor), Slope (S-Factor), Vegetation management (C-Factor), and Soil conservation measures and Water (P-Factor) The results of the study showed that The Phetchaburi River Basin during the rainy season has soil loss rates of 0 – 749.11 tones/ha, while in the winter seasons the soil loss rates are 0 – 93.80 tones/ha. When considering the area with high soil loss, it was found that it was located in the area with high slope. And is a deciduous forest which will drop the leaves during the dry season when there is no rain Therefore, when it rains, there is a lack of shrubs to support the impact of raindrops, causing soil loss in the area
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