| Summary: | 碩士 === 國立中興大學 === 水土保持學系所 === 100 === Since the impact of the greenhouse effect, and caused global climatic extreme anomalies, Taiwan area would also be affected, resulting in concentration of rain, rainfall intensity increase, and rapid increase in river flow or sewers in urban areas due to the poor drainage flooding. Because flooding is located in the low-lying drainage channels and siltation, the waterway twists and turns, cause the original drainage water capacity is not sufficient, resulting in heavy rain floods overflow flooded the formation of disaster.
Because the Changhua Xian-Zhuang basin upstream the catchment area under the silt moves, Lead to torrent sedimentation and drainage road,cause present situation watering ability is insufficien, as well as the most ditch section has not reached 10 years rainfall Return Period from the protection standard, flood overflow flooding on both sides of the river, and torrent did not converge with the downstream area draining properly, creates the tail water outlet overflow situation.
This research will investigation status drainage system proceeds of flood control constructed real data data, application numerical mode (HEC-RAS) estimating water level, and velocity and so on water acting situation, again to numerical mode (SOBEK) simulation flooded water situations, proceeds results and actual floods investigation results validation comparison, they result reaching the same, therefore, if can will this a results, should can application in domestic other easy flooded water area, followed since collected status environment data and the investigation drainage road data began, After numerical pattern advance simulation of rainfall flooded area caused by circumstances, thereby providing the population when heavy rains come, rainfall reached disaster time to a certain extent, so that the residents from the threat of flooding and reduce the financial losses and economic loss, by promoting local prosperity.
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