Kajian Kawasan Rawan Banjir Air Laut (ROB) di Wilayah Medan Bagian Utara

Abstract

The tidal flood that occurred in northern Medan was due to the overflow of sea water when the tide entered the mainland, either directly or through river water overflowed. The land area affected by tidal flooding is getting wider and wider, so an analysis of the potential tidal flood vulnerability is needed as an effort to handle and prevent activity can be right on target. The potential for tidal flood vulnerability uses 9 criteria, for that the AHP and GIS integration methods are used in order to make rational decisions from several criteria that produce a vulnerability map. The results obtained in the northern area of Medan city that 1,546.89 ha (16.39%) have a high to very high level of vulnerability, while 4,411.92 ha (46.83%) have a moderate level of vulnerability to tidal flooding. The results of the vulnerability level show that 13 environments are in the very high category of 6.16%, 44 environments are in the high category of 20.85% and 64 environments are in the medium category of 30.33%. In the mitigation strategy, the efforts that must be made by the Government are 1. building pump houses, 2. structuring buildings, especially in the environment adjacent to the coast, 3. providing maps of tidal flood prone zones and vulnerability, 4. relocating the area by building flats.