Performance analysis of flood control buildings Mati river watershed area

The problem of flooding is a classic problem that befalls almost all regions in Indonesia. Likewise, the area in the Mati river watershed is experiencing problems that are not much different. Moreover, with the existing developments, almost all areas in the Mati River watershed have developed into urban settlement areas which have led to land conversion from agricultural land and green open land to other built-up land. The middle and downstream areas in the Mati River watershed are the main tourism areas in Bali such as Seminyak, Legian, Kuta and parts of the West Denpasar District, Denpasar City. These areas are dense settlements which contribute to increased surface runoff in almost all watershed areas. Several areas in the Mati River watershed are flood-prone areas, namely the Padangsambian area, Jalan Pura Demak area, Monang-Maning, Jalan Dewi Sri and areas in East Kuta. Several river improvements have been made to reduce the impact of flooding, namely changing the permanent weir to a mobile weir, normalizing the channel and building a pumping station which aims to reduce the effects of flooding and stagnant water during the rainy season