COMPARATIVE ANALYSIS OF ESTIMATED CROP EVAPOTRANSPIRATION PALM OIL TREE IN KUBU RAYA REGENCY WEST KALIMANTAN

• Main Author: RUSDIANSYAH (12813032), ILDO
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27964
• Institution: Institut Teknologi Bandung

Evapotranspiration is one of the important processes in the hydrologic cycle in knowing the need and availability of water in the agricultural sector. The amount of water needed for the plant at each stage of palm oil plant growth is important to know, in order to support the increase of palm oil productivity. <br /> <br /> This research applies remote sensing method from Landsat-8 satellite image by applying surface energy balance model to obtain spatial plant evapotranspiration value in Kubu Raya Regency, West Kalimantan. In this study also used several theoretical methods such as Penman-Monteith, Priestley-Taylor, and Samani-Hargreaves in comparison. In the discussion, several sample regions are used to support spatial analysis. <br /> <br /> The results of processing of Landsat-8, in each region of the samples showed the value of spatially distributed crop evapotranspiration. The values in all sample regions ranged between 0.72 and 3.19 on all occurrence dates with the highest ETc value on June 15, 2013 (SOI = 13.9) and the lowest on April 20, 2016 (SOI = -22). The theoretical ETc value is higher than the spatial ETc value. Differences in crop evapotranspiration values obtained from each method, both remote sensing and theoretical methods, are caused by differences in factors used to calculate the effect of plants on evapotranspiration processes, net radiation, soil heat flux, and sensible heat flux.