Analisis Potensi Air Sungai pada Embung 190 di PG. Bungamayang PTPN VII, Lampung

Abstract

Water is a very important element for sustainability of daily needs. Water also used as field irrigation. This research was serves to analyze the potential of river water in PG. Bungamayang PTPN VII, Lampung. This research conducted at 190th small dam in Sugar Factory of Bungamayang which is part of Tulang Bawang watershed and geographically located at 104° 52' 07" SL and 04° 35' 24" EL. In this research, the SWAT analyze performed using ArcSWAT 2012 as a plug-in for ArcGIS 10. In these simulations, performed of 4 process, including the process of watershed delineation, establishment of hydrological response units (HRU), data processing and SWAT simulation, and visualization process. For validation process, observation discharge and simulation discharge of SWAT used for comparison from March 20th until April 5th 2014. Based on SWAT simulation, shown 0.066 m3/s average discharge and for observation discharge, shown 0.043 m3/s average discharge with 0.897 coeffesien correlation. The potential water shown by the annual average discharge which has been simulated by SWAT. The maximum average annual discharge is 0.143 m3/s on April and minimum average annual discharge is 0.018 m3/s on September. With the result, potential water river on 190th small dam in PG. Bungamayang PTPN VII, Lampung is 2 373 950.55 m3 every years.