Original Research

Flood vulnerability level analysis as a hydrological disaster mitigation effort in Krueng Jreue Sub-Watershed, Aceh Besar, Indonesia

Helmi Helmi, Hairul Basri, Sufardi Sufardi, Helmi Helmi
Jàmbá: Journal of Disaster Risk Studies | Vol 11, No 1 | a737 | DOI: https://doi.org/10.4102/jamba.v11i1.737 | © 2019 Helmi Helmi, Hairul Basri, Sufardi Sufardi, Helmi Helmi | This work is licensed under CC Attribution 4.0
Submitted: 09 August 2018 | Published: 12 September 2019

About the author(s)

Helmi Helmi, Doctoral Study Program of Agriculture Sciences, Universitas Syiah Kuala, Darussalam, Banda Aceh, Indonesia; and, School of Forestry Science, Teungku Chik Pante Kulu, Banda Aceh, Indonesia
Hairul Basri, Faculty of Agriculture, Universitas Syiah Kuala, Darussalam, Banda Aceh, Indonesia
Sufardi Sufardi, Faculty of Agriculture, Universitas Syiah Kuala, Darussalam, Banda Aceh, Indonesia
Helmi Helmi, aculty of Agriculture, Universitas Syiah Kuala, Darussalam, Banda Aceh, Indonesia


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Abstract

The flood phenomenon in the Krueng Jreue Sub-Watershed, Aceh Besar, Indonesia, in recent years indicates biophysical damage to the land. Floods are influenced by factors from biophysical conditions of the land and high rainfall with small river cross-sectional capacity causing water to overflow the embankment and flood low areas. This research aims to analyse the flood vulnerability level in the Krueng Jreue Sub-Watershed, Aceh Besar, Indonesia. The results showed that flood vulnerability in the research area consisted of four classes: very vulnerable, vulnerable, moderately vulnerable and somewhat vulnerable, with each area averaging a score of 43.0, 38.8, 30.0 and 21.7. Types of land use that are particularly vulnerable to flooding are rice fields with a mean total score of 43.0. The vulnerable classes are found in settlements and moorings, with a total score of 42.0 and 36.5, respectively. While open land, shrubs, grasslands, primary forests and secondary forests are quite vulnerable to flooding, with a mean total score of 32.5 each: 30.0, 30.0, 28.0 and 27.0. The main components affecting flood vulnerability are rainfall, temperature and land use, while additional components are soil infiltration and slope. Mechanised hydrological disaster mitigation can be performed through optimisation of weir, embung, rorak and check-dam. Vegetative hydrological mitigation efforts can be performed by reforestation and agroforestry systems, maps and flood prediction. Non-technically, hydrological disaster mitigation efforts can be undertaken with legal policies, law enforcement, map creation and prediction of droughts and socialisation of legislation.

Keywords

land use; flood vulnerability; flood zone map; hydrological disaster mitigation; Sub-Watershed Krueng Jreue

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