Analisis multikriteria spasial dalam penentuan ketersediaan lahan sawah di Kabupaten Cianjur

Abstract

The research was aimed to compare Boolean Combination and Weighted Linear Combination analysis methods to determine paddy field availability; to define spatial relationship between physical, economic, and legal aspects as well as sustainability related to determining agricultural land availability; and to calculate paddy field availability. Recent methodological analysis on agricultural land availability has been considering physical or socio-economic aspects, however this would not ensure proper accounting of actual agricultural land utilization. In this research, additional aspects such as land allocation policies and erosion levels, were employed and served as supplementary variables in agricultural land availability analysis, therefore minimize possibility on conflicting land utilization and ensure agricultural sustainability. Spatial analysis using Geographical Information System coupled with Multi-criteria Evaluation was employed to investigate available lands based on previous criteria. Specifically, a Weighted Linear Combination (WLC) was assessed to provide dynamic variations of weight and adaptive to different effect of each variable. Weighting by means of Analytic Hierarchy Process (AHP) showed that physical factors (i.e. land suitability) achieved highest rank (about 16.7%), while the lowest was land utilization (6.3%). Analysis of WLC suggested that there are about 136,549 ha available for paddy field while analysis of Boolean Combination suggested 30,590 ha available for paddy field. In term of decision risk, Boolean Method was risk averse while WLC method divided the risk between aversion risk and taking risk.