Improvement of flood early warning lead time to enable sufficient community responses: a case study of Hat Yai City Southern Thailand

Somphop Wisuttisiri, . and Tanan Chub-Uppakarn, . and Papon Ruksee, . and Tanit Chalermyanont, . and Nantiya Indhanu, . Improvement of flood early warning lead time to enable sufficient community responses: a case study of Hat Yai City Southern Thailand. pp. 201-211. ISSN 2672-7226

Flooding is the only type of natural disaster that has significantly affected the way of life of the residents in Hat Yai city in southern peninsular Thailand. Since the large floods in 2010 warning capability by local authorities has been improved by forecasts of water level in the U-Tapao river. This paper describes the procedures used to determine appropriate water-level forecasting approaches and also focuses on improving flood early warning lead time to enable sufficient response. The water level forecasting results showed that the actual lead times of 5 10 and 10 hours and the lead time errors of 4 4 and 0 hours for flood routing unit hydrograph and MIKE 11 DA approaches respectively. Performance evaluation for the best approach was conducted based on the longest actual lead time and the least lead time error criteria. The best approach was found to be the MIKE 11 DA followed by the unit hydrograph and the flood routing approaches. In addition increasing the lead time from 5 to 10 hours can be achieved for the Hat Yai flood warning system.

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Abstract

Flooding is the only type of natural disaster that has significantly affected the way of life of the residents in Hat Yai city in southern peninsular Thailand. Since the large floods in 2010 warning capability by local authorities has been improved by forecasts of water level in the U-Tapao river. This paper describes the procedures used to determine appropriate water-level forecasting approaches and also focuses on improving flood early warning lead time to enable sufficient response. The water level forecasting results showed that the actual lead times of 5 10 and 10 hours and the lead time errors of 4 4 and 0 hours for flood routing unit hydrograph and MIKE 11 DA approaches respectively. Performance evaluation for the best approach was conducted based on the longest actual lead time and the least lead time error criteria. The best approach was found to be the MIKE 11 DA followed by the unit hydrograph and the flood routing approaches. In addition increasing the lead time from 5 to 10 hours can be achieved for the Hat Yai flood warning system.

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Item Type:	Article
AGROVOC Term:	Flooding
AGROVOC Term:	Early warning systems
AGROVOC Term:	Case studies
AGROVOC Term:	Forecasting
AGROVOC Term:	Application methods
AGROVOC Term:	Rainfall patterns
AGROVOC Term:	Hydrography
AGROVOC Term:	Water levels
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10744

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