GENERATING 3D MODEL FOR FLOOD MANAGEMENT: HITECH INDUSTRIAL ESTATE, PHRA NAKHON SI AYUTTAYA PROVINCE

摘要

The objective of this paper is to study and analyze the cross-section of the lower Chao Phra Ya River's flow pattern and to simulate the flow pattern HAC-RAS model for the flood prevention in Hitech Industrial Estate, Phra Nakorn Si Ayutthaya Province. The study involves the simulation of flow pattern of the lower Chao Phra Ya River at station S5, C29, and C34, including water surface level and maximum flow rate data of September 2011 into the cross sectional analysis. In order to explain the flow pattern of the river, Manning's Roughness Coefficient of the river (0.04) and river bank (0.05) were used in this step. The river cross-section analysis will provide height surface level of each part of the river, and it will be useful for building of water barrier. Based on the result, Hitech Industrial Estate shall build 4.38 meter high of barrier from water surface level. After the accuracy assessment of flooding model compared with flooded area in 2010, the accuracy is 73%. Moreover, water surface elevation was used for generating of flood map and HAC-RAS model 3 dimensional models generating on Skyline Terrasuit v.5.1. These maps will be useful for flood prevention management.