Watershed-based Flash Flood Risk Assessment in Yulin Municipality, Guangxi, China

C. Z. Li, M. Zhang, X. L. Zhang, H. Wang, K. B. Luo, C. J. Liu, D. Y. Sun

2018

Abstract

An analysis was performed on flash flood risk for the purpose of finding appropriate strategies and measures for flash flood management from area to area in Yulin region. This region suffered heavily from flash flood disasters in the past years and a project on Flash Flood Investigation and Assessment (FFIA) was conducted during the period of 2013-2016 focusing on acquiring basic information on flash flood prone area, historical flash flood events, riverside communities or towns. Based on the data from FFIA and risk triangle conception of on hazard, exposure and vulnerability, flash flood risk assessment was performed for each watershed entity in mountainous area, by steps of suitable risk index system development, appropriate risk assessment model construct, risk component computation and flash flood risk analysis. The main understandings include: 1) consideration on computed entity and weight set for risk factors made the results more creditable; 2) exposure level distributes evenly and the areas with high and medium flash flood vulnerability level concentrate in the lower of the Nanliu River and the Beiliu River; 3) referring to the main stream line of the Nanliu River and the Beiliu River, hazard level in the lower part is much higher than that in the upper part, and the areas with high and medium flash flood risk level concentrate on both mountainous and hilly areas along the line. Finally, suggestions on flash flood countermeasures were made at county level, including macro-scale rainfall monitoring, local rainfall and water stage monitoring and warning, community-based awareness and drill, appropriate local structural measures. This risk analysis was made special by considering on overlaying effect of risk tri-components and watershed-based entity.

Paper Citation

in Harvard Style

Li C., Zhang M., Zhang X., Wang H., Luo K., Liu C. and Sun D. (2018). Watershed-based Flash Flood Risk Assessment in Yulin Municipality, Guangxi, China.In Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE, ISBN 978-989-758-344-5, pages 62-77. DOI: 10.5220/0007557100620077

in Bibtex Style

@conference{iwemse18,
author={C. Z. Li and M. Zhang and X. L. Zhang and H. Wang and K. B. Luo and C. J. Liu and D. Y. Sun},
title={Watershed-based Flash Flood Risk Assessment in Yulin Municipality, Guangxi, China},
booktitle={Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE,},
year={2018},
pages={62-77},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007557100620077},
isbn={978-989-758-344-5},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Environmental Management, Science and Engineering - Volume 1: IWEMSE,
TI - Watershed-based Flash Flood Risk Assessment in Yulin Municipality, Guangxi, China
SN - 978-989-758-344-5
AU - Li C.
AU - Zhang M.
AU - Zhang X.
AU - Wang H.
AU - Luo K.
AU - Liu C.
AU - Sun D.
PY - 2018
SP - 62
EP - 77
DO - 10.5220/0007557100620077