Analysis of Soil Damage on Dry Land Based on Geographic Information System in Sawan Sub-Distric, Buleleng Regency

Abstract— Sawan sub-district is one of the sub-districts in Buleleng Regency, part of which is dry land with an area of 3,144.06 ha. Dry land productivity in Sawan Sub-district is vulnerable to decline because land management is still not in accordance with conservation principles. The purpose of the study was to determine the potential for soil damage, the status of soil damage, the distribution of soil damage, and the direction of soil damage management on dry land in Sawan District. The method in this study used a comparative descriptive method. Parameters observed in the field include surface rock and soil solum depth while parameters analyzed in the laboratory are content weight, fraction composition, permeability, total porosity, pH, DHL, number of microbes and C-organic content. Based on the overlay of land use map, rainfall map, slope map, and soil type map using geographic information system, 17 SLH were obtained. The results showed two classes of potential soil damage, namely the potential for mild soil damage in Bebetin Village, Suwug Village, Sekumpul Village with a distribution percentage of 64.7% and the potential for moderate damage in Sudaji Village, Giri Emas Village, Lemukih Village, Bebetin Village and Sekumpul Village with a distribution percentage of 29.4%. Soil damage status classified as light in Bebetin Village, Giri Emas Village, Lemukih Village, Sekumpul Village and Sudaji Village with a distribution percentage of 64.7%, no factors causing soil damage status were found so that it is classified as good. Lightly damaged soil status with limiting factors of permeability is found in Sudaji Village, Suwug Village and Lemukih Village with a distribution percentage of 29.4%. Lightly damaged soil status with limiting factors of content weight, pH, and permeability is found in Bungkulan Village with a distribution percentage of 5.8%. Recommendations for improvement are the addition of organic matter and soil management can be done by planting cover crops or by crop rotation.