Nursida Arif
Universitas Muhammadiyah Gorontalo

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REMOTE SENSING AND GIS APPROACHES TO A QUALITATIVE ASSESSMENT OF SOIL EROSION RISK IN SERANG WATERSHED, KULONPROGO, INDONESIA Arif, Nursida; Danoedoro, Projo; Hartono, Hartono
Geoplanning: Journal of Geomatics and Planning Vol 4, No 2 (2017): (October 2017)
Publisher : Department of Urban and Regional Planning, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/geoplanning.4.2.131-142

Abstract

This research aims to determine the risk of soil erosion qualitatively by integrating remote sensing with the geographic information system. Factors that contributed to the occurrence of erosion in the area of study were analyzed using the method of the variation of combined input data of the factors controlling erosion (soil, climate, topography, vegetation, and humans). The input data were quantitative data changed into qualitative data that were obtained from field data and extracted from remote sensing imagery, i.e. SPOT 5. A number of parameters were calculated using the RUSLE model equation. The model was validated by observing the qualitative erosion indicators in the field (pedestal, tree root exposure, armor layers, rill erosion, and gully erosion) by observing slope steepness in each sample area. The area of study was Serang watershed located in Kulon Progo Regency, Yogyakarta. It is one of the critically potential watersheds viewed from the landform and land use. The results of various combinations generated the highest of accuracy by 90.57 % with extremely erosion dominating the area of study. The factors with the highest contribution to erosion in Serang Watershed were slope length and steepness (LS) and erodibility (K).
ANALISIS SPASIAL LAHAN KRITIS DI KECAMATAN BUKAL KABUPATEN BUOL Arif, Nursida
AKADEMIKA Vol 1, No 3 (2013)
Publisher : AKADEMIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Land conversion on the increase due to the insistence of the human need for natural resources available. The impact of this is the emergence of critical land that become a new problem for the government. Spatial analysis of critical land is done to see the spread of critical land with the aim of helping to prioritize conservation or rehabilitation of land in the study area. Sampling was is done with field survey and analysis of the maps consisting of variables that determine critical land. The parameters are used as a determinant of critical class of land i.e land cover, slope, solum depth, and soil texture. The results show areas of research are somewhat critical areas and critical potential spread of plantation area while critical in most residential areas. The dominant factor affecting the critical of land in the district, namely Buccal slope and land conversion.