Indonesian Journal of Geography
Vol 53, No 2 (2021): Indonesian Journal of Geography

Accuracy of The Level of Critical Water Catchment Area for Flood Mitigation Around Bengkulu City, Indonesia

Bambang Sulistyo (Faculty of Agriculture, University of Bengkulu, Kandang Limun, Bengkulu)
Hery Suhartoyo (Faculty of Agriculture, University of Bengkulu, Kandang Limun, Bengkulu)
Teguh Adiprasetyo (Faculty of Agriculture, University of Bengkulu, Kandang Limun, Bengkulu)
Kanang Setyo Hindarto (Faculty of Agriculture, University of Bengkulu, Kandang Limun, Bengkulu)
Noviyanti Listyaningrum (Graduate School, University of Gadjah Mada, Bulaksumur, Yogyakarta)



Article Info

Publish Date
28 Aug 2021

Abstract

Disaster mitigation activities require the availability of a potentially flooded area (PFA) map. One of the causes of flooding is the criticality of water catchment areas; the higher the criticality level, the higher the flooding potential. This study aims to determine the accuracy of the model for determining the PFA around Bengkulu City, which was derived from the Level of Critical Water Catchment Area (LCWCA) model developed by the Ministry of Forestry. After obtaining the LCWCA Map, another analysis was performed in order to obtain the PFA Map. Furthermore, the overlaying was carried out with the Existing Flood Map in such a way that the level of accuracy is known. The threshold values from Justice are used to justify the level of accuracy in three categories, namely Good (> 85%), Moderate (70 - 85%), and Poor (<70%). The results showed that in the eight sub-watersheds around the city of Bengkulu, there were two sub-watersheds with reasonable accuracy (> 85%), which means that there was > 85% overlap between areas on the Potentially Flooded Area Map as a result of the analysis of The LCWCA with the area on the Existing Flood Map. There are three sub-watersheds with Moderate accuracy (70 - 85%) and three sub-watersheds with Poor accuracy (<70%)

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Journal Info

Abbrev

ijg

Publisher

Subject

Earth & Planetary Sciences

Description

Indonesian Journal of Geography ISSN 2354-9114 (online), ISSN 0024-9521 (print) is an international journal of Geography published by the Faculty of Geography, Universitas Gadjah Mada in collaboration with The Indonesian Geographers Association. Our scope of publications includes physical geography, ...