MITIGASI BANJIR STRUKTURAL DAN NON-STRUKTURAL UNTUK DAERAH ALIRAN SUNGAI RONTU DI KOTA BIMA (Structural and non-structural flood mitigation for Rontu Watershed in Bima City)

Rizki Kirana Yuniartanti

Abstract


Flood is one of natural disasters that often occur in Indonesia. This disaster also occurred in Bima City on December 21, 2016, December 23, 2016, and January 2, 2017 with the affected area were Mpunda, Rasanae Timur, Asakota, Rasanae Barat, and Raba districts. The urban areas become the most affected areas, mainly in the residential areas that located more than 50 meters from the flood plains. The variations of flood heights ranged from 1-4 meters. In addition to the hydrometeorological factors, the flood in Bima was caused by several factors, such as: loss of riparian areas function which  turned into settlements nowadays, siltation in the downstream areas, poor management of urban drainage systems, reduced vegetation cover in upstream, and narrowing of river bodies. With the increasing of hydro-meteorological disaster problems and challenges, recommendations of structural and non-structural infrastructure to reduce the risk of flood disaster are needed. Therefore, this research aims to provide recommendations of structural and non-structural as an effort to mitigate flood disaster in Bima City. Analytical methods used in this research were participatory mapping, flood hazards mapping and modeling, and qualitative description. Results showed that the management of Rontu watershed in controlling flood would be effective and efficient by combining the structural and non-structural development. Mapping and modeling the flood-affected areas can become a source in the riparian planning regulation to reduce the risk of flooding.

Keywords


flood; structural; and non structural

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DOI: https://doi.org/10.20886/jppdas.2018.2.2.137-150

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