Estimation of regional intensity–duration–frequency relationships of extreme rainfall by simple scaling in Thailand

Author:

Yamoat Nirat1ORCID,Hanchoowong Ratchawatch2ORCID,Yamoad Oratai3ORCID,Chaimoon Nida4ORCID,Kangrang Anongrit4ORCID

Affiliation:

1. a Department of Civil and Environmental Engineering Technology, King Mongkut's University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand

2. b Department of Civil Engineering, Mahanakorn University of Technology, 140 Cheum-Sampan Road, Nong Chok, Bangkok 10530, Thailand

3. c Faculty of Sports and Health Science, Thailand National Sports University, 1 Moo 4 Malaiman Road, Rua Yai, Muang, Suphan Buri 72000, Thailand

4. d Department of Environmental Engineering, Mahasarakham University, Khamriang, Kantarawichai, Maha Sarakham 44150, Thailand

Abstract

AbstractIn 2022, Thailand was subjected to extensive flooding all over the country in both urban and rural areas, which caused tremendous losses. Better design and construction of infrastructures for timely and sufficient drainage can help mitigate the problems. This requires accurate intensity–duration–frequency (IDF) relationships at or near the problem areas. To obtain an IDF curve, a continuous rain record from an automatic gauge of the area is needed. Some automatic rain-gauge stations are scattered all over the country and are much fewer in number than the daily-reading rain-gauge stations. By applying a simple scaling theory, we can construct IDF curves from the daily rain records. The 37 automatic stations distributed the scaling exponent over the country. Gumbel location and scale parameters, from 30-year rainfall records, were determined. These three parameters were mapped throughout the country and are ready to be used for creating an IDF curve at any location in the country. We verified these parameters to generate IDF curves for three sites in different regions and found very good agreements. The majority of the errors were less than 15%.

Publisher

IWA Publishing

Subject

Management, Monitoring, Policy and Law,Atmospheric Science,Water Science and Technology,Global and Planetary Change

Reference19 articles.

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2. Bumpenkit P. 1999 The Relationship of Rainfall Intensity Duration Frequency of Difference Regions in Thailand. Report Royal Irrigation Department (RID), Thailand.

3. A simple scaling analysis of rainfall in Andalusia (Spain) under different precipitation regimes;Water,2022

4. Estimation of sub-daily IDF curves in Singapore using simple scaling,2013

5. Erazo B. 2020 Representing Past and Future Hydro-Climatic Variability Over Multi-Decadal Periods in Poorly-Gauged Regions: The Case of Ecuador . Thesis, Université Paul Sabatier, Toulouse, France.

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