KAJIAN GEOLOGI TATA LINGKUNGAN DAERAH RESAPAN AIR STUDI KASUS KECAMATAN UNGARAN BARAT, KABUPATEN SEMARANG, PROVINSI JAWA TENGAH

Abstract

Every human needs a place to stay for a living and growing. Development and human needs will cause multi player effect. Multi player is the effect of conflict between humans and their environment, including land occupied and water needs. It can affect land use and the environment occupied by land-use change as well as a water catchment area. Catchment area is a protected area set out in the Keputusan Menteri Negara Lingkungan Hidup No.39/MENLH/8/1996. According to Perda Kabupaten Semarang No. 6 Tahun 2011, the Article 23 mentions the protected area covers an area protected forests, which provide protection layers of subordinates, the local protected area, the nature reserves, conservation of nature and cultural heritage, prone to natural disasters areas and protected areas of geology. While Article 25 states that areas that provide protection against subordinates is the catchment area in which the District of West Ungaran including watersheds. Primary election is because the district has a higher population density than the other watersheds. The purpose of the study was to determine the distribution of the region's water catchment areas, watershed land use changes and the feasibility of the study area as a watershed by using the overlay method and the weighting on each parameter studies, to know the distribution area of water catchment areas. Parameters used as a reference to assess the catchment area is the land elevation> 1500 m asl, slope> 40%, the use of land as forests and green open spaces, rainfall> 2000mm/tahun, sensitive or highly sensitive land to erosion. From the results of weighting and scoring parameters land elevation, slope and land use, generate zone - the zone parameters are then be overlaid on the zone. Then obtained the territory of its catchment area is Southwestern area of research, a foot of Mount Ungaran, precisely some areas Nyatnyono Village, Gogik Village and Lerep Village. Keywords: Multi player effect, protected areas, overlay, the distribution of water catchment areas