Nonpoint Source Pollution From a Tropical Urban Residential Area

Despite all efforts taken by the Government, water quality related problems in Malaysian rivers remain unresolved. This is mainly due to the fact that most of the attention is focused on the point source (PS) pollutions whereas a significant amount of annual pollution load is also generated from...

Full description

Saved in:

Bibliographic Details
Main Author:	Al-Mamun, Abdullah
Format:	Thesis
Language:	English English
Published:	2005
Subjects:	Nonpoint source pollution Agricultural pollution
Online Access:	http://psasir.upm.edu.my/id/eprint/6026/1/FK_2005_22.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.6026
record_format	uketd_dc
spelling	my-upm-ir.60262023-01-05T03:33:49Z Nonpoint Source Pollution From a Tropical Urban Residential Area 2005-07 Al-Mamun, Abdullah Despite all efforts taken by the Government, water quality related problems in Malaysian rivers remain unresolved. This is mainly due to the fact that most of the attention is focused on the point source (PS) pollutions whereas a significant amount of annual pollution load is also generated from the nonpoint sources (NPS) as a result of storm runoff. After the endorsement of the urban stormwater management manual by the cabinet in June 2000, it was realised that in order to quantify the significance of NPS pollution there was an urgent need to conduct detail studies on the storm runoff quality from various landuses in Malaysia. As such, this pioneer study was conducted in detail to characterise the storm runoff quality from a developed urban residential area. Rainfall is the main driving force of nonpoint source pollution. Therefore, the daily rainfall data was collected from a nearby station to study the distribution of daily rainfall from 1985 to 2003. It was found that about 83% of the storm events was less than or equal to 25 mm. This proved that the most frequent and small rainfall events were responsible for more NPS pollution. This finding was in agreement with the hypothesis that frequent rainfall events cause more NPS pollution. Frequency analysis of monthly maximum rainfall revealed that rainfall amount of 3-month return period for the NPS pollution control would be 60 rnm. FiRy-six rain events were monitored to calculate the event mean concentration (EMC) values of the parameters, which are contributed mostly from the nonpoint pollution sources. The median EMC values for Turbidity, TDS, TSS, BOD, COD, Pb, Zn, Cu and Cr were calculated to be 36 NTU, 47.3, 126.5,29, 120, 0.0143, 0.3046, 0.0135 and 0.0187 mg/L, respectively. These data can be used to calculate the annual pollution loading from an urban residential area with combined sewerage system, which conveys sullage and storm runoff.It was determined that TSS (78.4%), COD (51.8%), Pb (loo%), Zn (80%), Cr (100%) and Cu (52.7%) were mostly generated from the nonpoint pollution sources. This finding was in agreement with the second hypothesis that nonpoint sources contributed more annual TSS, COD and heavy metal loads than point sources in a developed urban residential area. Compared to the point sources,lesser amounts of BOD and TDS loadings were generated from the nonpoint sources, which were 39.1% and 20%, respectively. However, according to the existing water quality guideline, contribution of BOD loading from runoff was considered significant. The hypothesis was not true in the case of BOD and TDS annual loading, which were more generated from the point sources. Nonpoint source pollution Agricultural pollution 2005-07 Thesis http://psasir.upm.edu.my/id/eprint/6026/ http://psasir.upm.edu.my/id/eprint/6026/1/FK_2005_22.pdf text en public phd doctoral Universiti Putra Malaysia Nonpoint source pollution Agricultural pollution Engineering English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Nonpoint source pollution Agricultural pollution
spellingShingle	Nonpoint source pollution Agricultural pollution Al-Mamun, Abdullah Nonpoint Source Pollution From a Tropical Urban Residential Area
description	Despite all efforts taken by the Government, water quality related problems in Malaysian rivers remain unresolved. This is mainly due to the fact that most of the attention is focused on the point source (PS) pollutions whereas a significant amount of annual pollution load is also generated from the nonpoint sources (NPS) as a result of storm runoff. After the endorsement of the urban stormwater management manual by the cabinet in June 2000, it was realised that in order to quantify the significance of NPS pollution there was an urgent need to conduct detail studies on the storm runoff quality from various landuses in Malaysia. As such, this pioneer study was conducted in detail to characterise the storm runoff quality from a developed urban residential area. Rainfall is the main driving force of nonpoint source pollution. Therefore, the daily rainfall data was collected from a nearby station to study the distribution of daily rainfall from 1985 to 2003. It was found that about 83% of the storm events was less than or equal to 25 mm. This proved that the most frequent and small rainfall events were responsible for more NPS pollution. This finding was in agreement with the hypothesis that frequent rainfall events cause more NPS pollution. Frequency analysis of monthly maximum rainfall revealed that rainfall amount of 3-month return period for the NPS pollution control would be 60 rnm. FiRy-six rain events were monitored to calculate the event mean concentration (EMC) values of the parameters, which are contributed mostly from the nonpoint pollution sources. The median EMC values for Turbidity, TDS, TSS, BOD, COD, Pb, Zn, Cu and Cr were calculated to be 36 NTU, 47.3, 126.5,29, 120, 0.0143, 0.3046, 0.0135 and 0.0187 mg/L, respectively. These data can be used to calculate the annual pollution loading from an urban residential area with combined sewerage system, which conveys sullage and storm runoff.It was determined that TSS (78.4%), COD (51.8%), Pb (loo%), Zn (80%), Cr (100%) and Cu (52.7%) were mostly generated from the nonpoint pollution sources. This finding was in agreement with the second hypothesis that nonpoint sources contributed more annual TSS, COD and heavy metal loads than point sources in a developed urban residential area. Compared to the point sources,lesser amounts of BOD and TDS loadings were generated from the nonpoint sources, which were 39.1% and 20%, respectively. However, according to the existing water quality guideline, contribution of BOD loading from runoff was considered significant. The hypothesis was not true in the case of BOD and TDS annual loading, which were more generated from the point sources.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Al-Mamun, Abdullah
author_facet	Al-Mamun, Abdullah
author_sort	Al-Mamun, Abdullah
title	Nonpoint Source Pollution From a Tropical Urban Residential Area
title_short	Nonpoint Source Pollution From a Tropical Urban Residential Area
title_full	Nonpoint Source Pollution From a Tropical Urban Residential Area
title_fullStr	Nonpoint Source Pollution From a Tropical Urban Residential Area
title_full_unstemmed	Nonpoint Source Pollution From a Tropical Urban Residential Area
title_sort	nonpoint source pollution from a tropical urban residential area
granting_institution	Universiti Putra Malaysia
granting_department	Engineering
publishDate	2005
url	http://psasir.upm.edu.my/id/eprint/6026/1/FK_2005_22.pdf
_version_	1776100249739198464

Nonpoint Source Pollution From a Tropical Urban Residential Area

Similar Items