Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region

Application of source-control approach for catchment wide implementation is increasing in watershed stormwater management, especially stormwater detention pond. The study of cumulative impact of stormwater detention ponds in watershed scale have found out the pre-development peak flow rate can’t be...

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Main Author:	Chai, Pin Kang
Format:	Thesis
Published:	2014
Subjects:	TD Environmental technology Sanitary engineering
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id	my-utm-ep.48440
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spelling	my-utm-ep.484402017-07-27T03:49:48Z Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region 2014 Chai, Pin Kang TD Environmental technology. Sanitary engineering Application of source-control approach for catchment wide implementation is increasing in watershed stormwater management, especially stormwater detention pond. The study of cumulative impact of stormwater detention ponds in watershed scale have found out the pre-development peak flow rate can’t be maintained. However, there is no related study found on tropical watershed. It is important to know whether the hydrologic response is still same in different climate region as different climatic factor influences the performance of detention pond. The research is intended to evaluate the cumulative impact of stormwater detention ponds in watershed scale under tropical climate. The study was carried out in selected upstream section of Skudai river catchment. HEC-HMS software with extension of HEC-GeoHMS was applied to develop hydrologic model for assessing research objective. Analyses of hydrographs for post-development with detention ponds and post-development without detention pond scenarios were performed for single storm event, synthetic storms and time-series discharge. The overall performance of stormwater detention ponds and catchment outlet are evaluated to examine cumulative impact with design storm of ARI of 2-, 5-, 10- and 20-year. The overall peak discharge reduction indicated by each detention pond vary from 13.9 to 76.6%, 6.8 to 78,5%, 4.1 to 80% and 2.7 to 81.3% over ARIs, respectively. The overall performance of catchment outlet over ARIs are 32.6%, 28.8%, 28.8% and 28.6% respectively. About 30% efficiency loss recorded at catchment outlet over ARIs is the evidence of cumulative impact of stormwater detention ponds on a catchment scale in tropical climate 2014 Thesis http://eprints.utm.my/id/eprint/48440/ masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
topic	TD Environmental technology Sanitary engineering
spellingShingle	TD Environmental technology Sanitary engineering Chai, Pin Kang Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
description	Application of source-control approach for catchment wide implementation is increasing in watershed stormwater management, especially stormwater detention pond. The study of cumulative impact of stormwater detention ponds in watershed scale have found out the pre-development peak flow rate can’t be maintained. However, there is no related study found on tropical watershed. It is important to know whether the hydrologic response is still same in different climate region as different climatic factor influences the performance of detention pond. The research is intended to evaluate the cumulative impact of stormwater detention ponds in watershed scale under tropical climate. The study was carried out in selected upstream section of Skudai river catchment. HEC-HMS software with extension of HEC-GeoHMS was applied to develop hydrologic model for assessing research objective. Analyses of hydrographs for post-development with detention ponds and post-development without detention pond scenarios were performed for single storm event, synthetic storms and time-series discharge. The overall performance of stormwater detention ponds and catchment outlet are evaluated to examine cumulative impact with design storm of ARI of 2-, 5-, 10- and 20-year. The overall peak discharge reduction indicated by each detention pond vary from 13.9 to 76.6%, 6.8 to 78,5%, 4.1 to 80% and 2.7 to 81.3% over ARIs, respectively. The overall performance of catchment outlet over ARIs are 32.6%, 28.8%, 28.8% and 28.6% respectively. About 30% efficiency loss recorded at catchment outlet over ARIs is the evidence of cumulative impact of stormwater detention ponds on a catchment scale in tropical climate
format	Thesis
qualification_level	Master's degree
author	Chai, Pin Kang
author_facet	Chai, Pin Kang
author_sort	Chai, Pin Kang
title	Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
title_short	Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
title_full	Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
title_fullStr	Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
title_full_unstemmed	Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
title_sort	evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2014
_version_	1747817390823964672

Evaluation of cumulative impacts of stormwater detention ponds on watershed in tropical region

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