Review of water quality monitoring programme and water quality index (WQI) for inland waters of Hong Kong

2019 ◽  
Author(s):  
Chun Yip Lai
Keyword(s):  
Water Quality ◽  
Hong Kong ◽  
Water Quality Index ◽  
Quality Index ◽  
Water Quality Monitoring ◽  
Monitoring Programme ◽  
Quality Monitoring ◽  
Inland Waters

scholarly journals Determination of Some Physico-Chemical Parameters and Water Quality Index (WQI) of Laguna de Bay, Philippines

2020 ◽  
pp. 1-6
Author(s):  
Jessa Marie S. Caabay S. Caabay
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Water Quality Monitoring ◽  
The Philippines ◽  
Quality Monitoring ◽  
Critical Element ◽  
Index Method ◽  
Physico Chemical ◽  
Laguna De Bay

Water quality monitoring activities is a vital part in assessing the status of certain bodies of water such as the Laguna de Bay. The lake has been a significant natural resource as a catchment of an expansive watershed providing various ecological and economic values. It is the largest inland water body in the Philippines and the third largest in South East Asia. Water quality monitoring network is a critical element in the assessment, restoration and protection of Laguna de Bay. This paper measured some important physico-chemical properties of four selected sites from Laguna de Bay such as temperature, pH, electrical conductivity, alkalinity, dissolved oxygen levels, and phosphate and ammonia concentrations. Water Quality Index (WQI) utilizing Weighted Arithmetic Water Quality Index Method was also evaluated.

scholarly journals Sensitivity analysis for water quality monitoring frequency in the application of a water quality index for the uMngeni River and its tributaries, KwaZulu-Natal, South Africa

Water SA ◽  
2018 ◽  
Vol 44 (4 October) ◽  
Author(s):  
JN Namugize ◽  
GPW Jewitt
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Quality Data ◽  
Quality Indices ◽  
Water Quality Indices ◽  
Monitoring Frequency

Water quality indices are commonly used to provide summary information from water quality monitoring programmes to stakeholders. However, declining funding and changing mandates often result in reduced monitoring frequencies which could affect the accuracy of information provided. Thus, this study aimed to assess the effect of water sampling frequency on water quality index reporting using the the upper uMngeni catchment as a study site. A 28-year time series of water quality data from 11 sampling stations was assessed for pH, electrical conductivity, temperature, turbidity, total suspended solids, Escherichia coli counts, NH4-N, NO3-N, PO4-P and total phosphorus. Statistical packages were used to process the data and water quality indices (WQIs) for eutrophication and recreational water were calculated and their sensitivity to input parameters analysed. It was found that the higher the monitoring frequency, the lower the WQI calculated at all sites. This suggests that water quality, due to a declining monitoring frequency, is poorer than reported in the uMngeni catchment. The findings showed that Escherichia coli and turbidity are the most influential variables affecting the recreational and eutrophication WQIs, respectively. Although WQIs are considered a useful tool for monitoring the changes in water quality across space and over time in the uMngeni Catchment, their use should complement, and not substitute for, other, more comprehensive, water quality management tools.

scholarly journals Water Quality Monitoring of Yamuna River by Using GIS Based Water Quality Index in Delhi, India

2017 ◽  
Vol 6 (2) ◽  
pp. 1249-1263 ◽  
Author(s):  
Shikha Sharma ◽  
Pawan Kumar Jha ◽  
Manju Rawat Ranjan ◽  
Umesh Kumar Singh ◽  
Tanu Jindal
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Yamuna River

DEVELOPMENT OF A MULTIPARAMETRIC QUALITY INDEX FOR WATER QUALITY MONITORING

2016 ◽  
Vol 15 (5) ◽  
pp. 1069-1074 ◽  
Author(s):  
Violeta-Monica Radu ◽  
Alexandru Anton Ivanov ◽  
Petra Ionescu ◽  
Gyorgy Deak ◽  
Marian Tudor
Keyword(s):  
Water Quality ◽  
Quality Index ◽  
Water Quality Monitoring ◽  
Quality Monitoring

scholarly journals Technical note: An anomaly in pH data in South Africa’s national water quality monitoring database – implications for future use

Water SA ◽  
2018 ◽  
Vol 44 (4 October) ◽  
Author(s):  
Carla-Louise Ramjukadh ◽  
Michael Silberbauer ◽  
Susan Taljaard
Keyword(s):  
Water Quality ◽  
Analytical Methods ◽  
Water Quality Monitoring ◽  
Technical Note ◽  
Buffering Capacity ◽  
Monitoring Programme ◽  
Quality Monitoring ◽  
Total Alkalinity ◽  
Meta Data ◽  
National Water

The South African national water quality database (Water Management System) houses data records from several environmental monitoring programmes, including the National Chemical Monitoring Programme (NCMP). The NCMP comprises an extensive surface water quality monitoring programme, managed by the Department of Water and Sanitation (DWS). The purpose of this technical note is to alert users to a systematic anomaly recently observed in the pH dataset of the NCMP, reflected in an abrupt increase between pre- and post-1990 data records. Although the cause of the anomaly in pH could not be confirmed with high confidence, an inappropriate acid rinse procedure in pre-1990 analytical methods was identified as the most likely cause, based on available evidence. This was supported by the variation in relative sensitivity when comparing the effect on waters with different buffering capacities, i.e., water with low buffering capacity (represented by total alkalinity < 10 mg/L, as CaCO3) showing the largest anomaly, compared with waters of higher buffering capacity (represented by total alkalinity > 30 mg/L, as CaCO3) showing the smallest anomaly. Historical pH data records in the NCMP (i.e. pre-1990), therefore should be used with caution, especially in more weakly buffered systems. The possibility of reconstructing data using a correction factor derived from detailed statistical analyses of the post-1990 pH characteristics at selected sites is a possible solution that could be investigated in future. A key lesson learnt is the need to be diligent in capturing detailed meta-data on sampling procedures and analytical methods in datasets spanning several generations. Availability of such information is critical in order to provide users with a means of evaluating the suitability and comparability of data records in long-term datasets. The DWS includes such meta-data in the current version of the database, dating from about 1995 onwards.

Monitoring of water transfer from Katse Dam into the Upper Vaal river system: water utility’s perspective

2003 ◽  
Vol 48 (10) ◽  
pp. 97-102 ◽  
Author(s):  
T. Lepono ◽  
H.H. Du Preez ◽  
M. Thokoa
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
River System ◽  
Water Quality Monitoring ◽  
Water Transfer ◽  
Monitoring Programme ◽  
Quality Monitoring ◽  
Transfer Scheme ◽  
Chemical Monitoring ◽  
Before And After

Water quality is of prime importance to Rand Water’s core business of ensuring a reliable supply of good quality drinking water to more than 10 million people. Rand Water has, therefore, implemented a water quality monitoring programme of the source water as well as the drinking water produced. The establishment of the Lesotho Highlands Water Transfer scheme necessitated the expansion of the monitoring programme. In 1996, Rand Water and Lesotho Highlands Development Authority (LHDA) signed an agreement to jointly develop an extensive water quality monitoring programme for the Lesotho Highlands Water Project (LHWP). Prior to this agreement, monitoring was mainly undertaken by consultants on behalf of LHDA in the main feeder rivers within the Katse Dam catchment (donor system). On the recipient system (Ash/Liebenbergsvlei), extensive physical and chemical monitoring was undertaken by Rand Water and Department of Water Affairs and Forestry (DWAF). Biological monitoring was however only carried out superficially prior to the release of water. Information gained from carrying out biological and chemical assessments clearly indicates that the water from LHWP has negatively impacted on the biological communities in the recipient system. The importance of detailed before and after biological and physio-chemical monitoring of both donor and recipient systems is emphasised.

Water quality considerations in developing a new resource for water supply within the midlands of England

1998 ◽  
Vol 38 (6) ◽  
pp. 201-208 ◽  
Author(s):  
D. J. Smith ◽  
S. Crymble
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Process ◽  
Water Quality Monitoring ◽  
Monitoring Programme ◽  
Quality Monitoring ◽  
Water Treatment Process ◽  
Increasing Demand ◽  
Major Consideration

Increasing demand for limited water resources within the Midlands of England resulted in a lower quality river being considered for water supply in an area of high urban and rural population. A comprehensive water quality monitoring programme was undertaken on the river to compare its quality with other sources used for water supply. Concurrent with the monitoring programme a series of laboratory scale trials began to assess how the river water could be treated, and the costs involved. A major consideration was the need to provide treated water by the summer of 1997, which precluded a complete new water treatment process from being designed. The paper outlines the results from the monitoring programme, including some of the problem parameters such as pesticides at over 10 ug/l, and how some of the sources of these pollutants were identified. It also describes the treatment trials and explains how a water treatment process was developed which utilises disused gravel workings to provide bankside storage and a combination of powdered and granular activated carbon to remove organic pollutants.

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