Identifikasi dan pemetaan tingkat lahan kritis wilayah dataran menengah Kabupaten Probolinggo menggunakan teknik sistem informasi geografi (SIG)

Abstract

The middle plains area of Probolinggo district has the potential to experience land degradation due to intensive agricultural land use without paying attention to the principles of soil and water conservation. This condition is corroborated by information from the Probolinggo Regency Environmental Agency (BLH), that the mid-plain area has experienced a continuous decline in production. This study aims to identify the status of damage and criticality of land by compiling a spatial database system for allocating critical land data. The research locations included Sumber Asih, Wonomerto, Bantaran, Maron, Krejengan, Tegal Siwalan and Pakuniran subdistricts.The research was conducted using the Geographic Information System which is divided into main activities, namely: Identification of damage and spatial analysis by overlapping maps for making studies of spatial administration, land cover, land use, and erosion maps by calculating the amount of soil erosion. Brightness factor, land cover is used to analyze the distribution of land criticality. Broadly speaking, the analysis stages of the spatial data preparation of critical land consist of 3 stages, namely: Overlapping spatial data, editing attribute data and tabular analysis. The conclusion is the status of soil damage including mild to moderate damage, and critical status classified as non-critical status covering an area of 15,613.22 ha (43.35%), critical potential 10,942.66 ha (30.38%), rather critical area of 8,134.56 ha. (22.58%), critical area of 196.23 ha (0.54%) and very critical area of 1.131.01 ha (3.14%).