Study of regional regulation on "Kawasan Bandung Utara" impact on flood discharges from the perspective of spatial variations of extreme precipitation in Bandung basin

This research was built from the probability of shifting urbanization patterns as a result of the Regional Regulation about Northern Bandung Region (Perda KBU). Moreover, extreme precipitation in the Bandung Basin not only happens in KBU but also varies spatially. The probability of urbanization shifting and spatial variation of extreme precipitation can increase flood discharge in other places. Three stages to understand how the spatial variations of extreme precipitation and land use affect flood discharge in Bandung Basin, namely: 1) Extreme precipitation data processing, 2) Land-use data processing, and 3) Hydrology Model simulation using HEC-HMS. Urbanization shifting to north non-KBU and east areas occurs as an impact of Perda KBU. It significantly affects flood discharge in the east area but relatively no impact in the north non-KBU area. Additionally, despite extreme precipitation frequency and volume, the south area has the biggest value. It opens the possibility that the South Bandung area has the potential to be the biggest contributor to Bandung Basin discharge. Therefore, flood study in the south area is needed as a priority.