Perubahan Penggunaan Lahan DAS Kreo Terhadap Debit Puncak Dengan Aplikasi Penginderaan Jauh

The misuse of land is not in line with conservation technique tends to enhance the runoff coeffitient rate which will affect the peak discharge . Kreo watershed, located in Semarang, is watershed which has undergone some changes in the landuse. This research aimed at examining the capability accurateness of the remote sensing technique when it is applied to date tapping on physical characteristic and watershed morphometry. This date tapping itself is aimed at estimating the peak discharge and evaluating the effect of some changes in land use to river stream using the rational method. The significant changes of land use which affect the volume of the runoff appears in the rice field which is about 24,89 km2 in 1992 and become 15,47 km2 in 1999. Using hydrograph comparison, the highest level of flood can be seen. Comparing the maximum and minimum stream, which in 1992 is 240,74 and in 1999 is 393,25 it can be seen that it significantly increases. This increase itself is parallel with the increase on land use which later affect the peak discharge. Key Words : Landuse, Runoff, Peak Discharge, Watershed, Remote Sensing Jurnal Riset Geologi dan Pertambangan Jilid 19 No. 2 (2009).69 - 84.