Oldeman Climate Zoning for the Agricultural Area

Abstract

Knowledge of the climate of a region is needed. One way to get to know the further climate is classified by calculating rainfall. One method to do that is Oldeman method by determining the average number of wet months and dry months later on interpolation and processed automatically in ArcGIS. This classification aims to determine the type of climate conditions based on Oldeman classification and regions spreading on each type of climate types in Soppeng. The results of this study are to map climate types using Oldeman classification system in Soppeng. In order to know the type of climate and Agro-climate zones in the study sites. The attribute value of the determination of the type of climate in the interpolation using kriging method. Data collection techniques are secondary data collection, observation, and documentation. The data obtained were processed and counted then displayed in the form of maps and described systematically. The results showed there are three types of climate B2, C3 and E. Distribution B2 climate includes DonriDonri District and Marioriawa District with an area of distribution of 13%. C3 Climate contained in Citta, Donri-Donri, Lalabata, Lilirilau, Marioriawa and Marioriwawo District with an area of distribution of 43%. E  Climate contained in the District Citta, Donri-donri, Ganra, Lalabata, Liliriaja, Lilirilau, and Marioriwawo with an area of distribution of 44% and there is 24,6 % areas wich conformity between agroclimatic zone and planting frequency.

Keywords: Climate Type, Oldeman, Soppeng Regency, Interpolation