DOI : https://doi.org/10.18517/ijaseit.11.2.9706

Flood Quantification Index Based on Inundation Indicators and Risk Scale

Ariani Budi Safarina (1), Iin Karnisah (2), Ade Sena Permana (3), - Chairunnisa (4), Muhshonati Syahidah (5)
(1) Civil Engineering Department, Universitas Jenderal Achmad Yani, Cimahi, 40532, Indonesia
(2) Civil Engineering Department, Politeknik Negeri Bandung, Bandung, 40559, Indonesia
(3) Electrical Engineering Department, Universitas Jenderal Achmad Yani, Cimahi, 40532, Indonesia
(4) Civil Engineering Department, Universitas Jenderal Achmad Yani, Cimahi, 40532, Indonesia
(5) Research and Development Center for Water Resources, Indonesian Ministry of Public Works and Housing, Bandung,40135, Indonesia
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How to cite (IJASEIT) :
Safarina, Ariani Budi, et al. “Flood Quantification Index Based on Inundation Indicators and Risk Scale”. International Journal on Advanced Science, Engineering and Information Technology, vol. 11, no. 2, Apr. 2021, pp. 656-62, doi:10.18517/ijaseit.11.2.9706.
Citation Format :
Flood management requires an assessment of flood levels that occur appropriately. Determining flood levels quantitatively can help control floods more efficiently. This study aims to make flood quantification based on the inundation indicators and scale of risk. The case study is in Citarik, Cilember, Cimahi, Cisangkan, and Cibeureum, located in the Citarum watershed, West Java, Indonesia. The method used is a mathematical model of flow verified by the river's physical dimensions. Four indicators were analyzed based on unsteady one-dimensional river flow and overland flow models. The four flood quantity indicators with different weights are namely percentage of inundation area (Ai), percentage of area activity on the inundation area (Aac), inundation duration (D), and inundation depth (H) which have consecutive indexes 0.3, 0.2, 0.2 and 0.3. The initial discharge was analyzed based on unit hydrograph at the upstream river cross-section of the inundation region. The study's results by verification of field observations showed that the highest peak inundation was 3.0 m in Cilember, inundation duration was a maximum of 18 hours in Citarik and Cilember, the highest inundation area was 329.23 % of the watershed area of Cilember. Results of calculations with the formulations, the highest quantity is 16.18 in Cilember flood that occurs in Melong village with a risk scale of 5. These results conclude that the Cilember flood is high-level damage so that it is a priority to be overcome.

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