KAJIAN PENANGGULANGAN KERUSAKAN LAHAN AKIBAT PERUBAHAN PENGGUNAAN LAHAN DENGAN PENDEKATAN MODEL HIDROLOGI PADA DAS PAMI

Abstract

<em>Changes in land use in watershed will affect peak discharge and degradation land. It is becoming an indicator of better or worse use of land in watershed area. This study aims to analysis land use change, to predict peak flows based on changes in land use and land use change scenarios in the Pami watershed. This study uses a number of primary data and secondary data. Primary data were obtained from observations of the condition of the land and soil sampling, which is then analyzed in the laboratory. Secondary data were obtained from literature and related agencies such as geographical map and thematic maps including land map, administrative area maps, land use maps in 1996-2015 and rainfall in 1996-2015. Data analysis included analysis of changes in land use, identification of watershed characteristics and hydrology analysis. Research results showed that changes in land use in 1996-2015 was dominated by primary forest but experiencing a decline around 39,94%. While land use included secondary forest and settlement area were increased by 73,10% and 70,61% respectively. Predicted peak flows based on changes in land use obtained the average of peak discharge in 1996 was about 118.7 m3/sec, while the average of peak discharge in 2015 amounted to 157.4 m3/sec where there is an increase of 33.5 %. Scenarios of land use change conducted in the mixed farming in Pami watershed obtained peak discharge of 157.4 m3/sec</em>