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An Artificial Neural Network Model for Rainfall Forecasting in Bangkok, Thailand : Volume 13, Issue 8 (07/08/2009)

By Hung, N. Q.

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Book Id: WPLBN0003975569
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: An Artificial Neural Network Model for Rainfall Forecasting in Bangkok, Thailand : Volume 13, Issue 8 (07/08/2009)  
Author: Hung, N. Q.
Volume: Vol. 13, Issue 8
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Tripathi, N. K., Babel, M. S., Weesakul, S., & Hung, N. Q. (2009). An Artificial Neural Network Model for Rainfall Forecasting in Bangkok, Thailand : Volume 13, Issue 8 (07/08/2009). Retrieved from http://cn.ebooklibrary.org/

Description: School of Engineering and Technology, Asian Institute of Technology, Thailand. This paper presents a new approach using an Artificial Neural Network technique to improve rainfall forecast performance. A real world case study was set up in Bangkok; 4 years of hourly data from 75 rain gauge stations in the area were used to develop the ANN model. The developed ANN model is being applied for real time rainfall forecasting and flood management in Bangkok, Thailand. Aimed at providing forecasts in a near real time schedule, different network types were tested with different kinds of input information. Preliminary tests showed that a generalized feedforward ANN model using hyperbolic tangent transfer function achieved the best generalization of rainfall. Especially, the use of a combination of meteorological parameters (relative humidity, air pressure, wet bulb temperature and cloudiness), the rainfall at the point of forecasting and rainfall at the surrounding stations, as an input data, advanced ANN model to apply with continuous data containing rainy and non-rainy period, allowed model to issue forecast at any moment. Additionally, forecasts by ANN model were compared to the convenient approach namely simple persistent method. Results show that ANN forecasts have superiority over the ones obtained by the persistent model. Rainfall forecasts for Bangkok from 1 to 3 h ahead were highly satisfactory. Sensitivity analysis indicated that the most important input parameter besides rainfall itself is the wet bulb temperature in forecasting rainfall.

An artificial neural network model for rainfall forecasting in Bangkok, Thailand

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