Water quality characteristics of Densu River basin in south-east Ghana

2010 ◽  
Vol 61 (6) ◽  
pp. 1467-1477 ◽  
Author(s):  
J. Amoako ◽  
A. Y. Karikari ◽  
O. D. Ansa-Asare ◽  
E. Adu-Ofori
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Background Level ◽  
Water Quality Monitoring ◽  
Natural Background ◽  
Nitrogen And Phosphorus ◽  
Background Values ◽  
Physico Chemical ◽  
Ph Range ◽  
Dominance Pattern

Water quality of the Densu River was studied by determining the levels of various physico-chemical parameters including trace metals for planning of the basin. The pH range (7.40–8.22) fell within the natural background level 6.5–8.5. The river was moderately hard with high turbidity due to poor farming practices, which result in large quantities of topsoil ending up in the river after rains. The river waters were well oxygenated with a mean DO concentration of 6.3 mg/l. Nitrogen and phosphorus levels were below their natural background values. The Densu River showed an overall ionic dominance pattern of Na > Ca  > K > Mg and Cl > HCO3 > SO4, a pattern which is an intermediate between fresh and sea water systems. The mean concentrations of metals for the basin followed the order: Fe > Mn > Zn > Pb > Cu > Cd. 84.6% of the sampling sites exceeded the background values of 0.3 mg/l and 0.1 mg/l for Fe and Mn respectively. Other metals Zn, Pb, Cu and Cd were all below their background levels indicating the river is unpolluted with respect to these metals. Water Quality index performed on the data depicted that River Densu is of poor to fairly good water quality. Regular water quality monitoring is recommended.

scholarly journals Stream Restoration for Legacy Sediments at Gramies Run, Maryland: Early Lessons from Implementation, Water Quality Monitoring, and Soil Health

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2164
Author(s):  
Katie Mattern ◽  
Alyssa Lutgen ◽  
Nathan Sienkiewicz ◽  
Grant Jiang ◽  
Jinjun Kan ◽  
...  
Keyword(s):  
Water Quality ◽  
Riparian Vegetation ◽  
Stream Restoration ◽  
Soil Health ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Nutrient Inputs ◽  
Nitrogen And Phosphorus ◽  
Partial Removal ◽  
Riparian Trees

While stream restorations are increasingly being adopted to mitigate sediment and nutrient inputs and to meet water quality regulatory targets, less information is available on the drivers behind the design, implementation, effectiveness, and cost of restorations. We address these issues for a $4.2 million stream restoration for legacy sediments implemented for a rural Piedmont stream in Maryland, USA. A total of 1668 m of stream was restored in three phases, which included the partial removal of legacy sediments, the grading of streambanks, floodplain creation, channel reshaping with meanders and pool-riffle forms, the raising of the stream bed, and the planting of riparian vegetation. The sediment, nitrogen, and phosphorus concentrations and fluxes were monitored before- and during the restoration phases. The sites selected for restoration had legacy sediments vulnerable to erosion and were on state-owned land. The restoration design was based on the need to maintain mature riparian trees and preserve existing sensitive wetland habitats. Water quality monitoring indicated that the sediment and nutrient fluxes increased during the restoration phase and were attributed to disturbance associated with construction activities and increased runoff. We also recommend that soil health needs to be included as an integral component to enhance the effectiveness and resilience of stream restorations.

scholarly journals Water Physico-Chemical Characteristics of the Lakes Burera and Ruhondo, Rwanda

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Valens Habimana ◽  
Antoine Nsabimana
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Chemical Characteristics ◽  
Class Iii ◽  
Populated Area ◽  
Physico Chemical ◽  
Steep Slopes ◽  
Extensive Agriculture

Rwanda possesses multiple lakes, whose properties were rarely described. The present study assessed physico-chemical characteristics of water in Burera and Ruhondo lakes located in highly populated area with steep slopes, which are under extensive agriculture, thus water quality monitoring is important. Both lakes were alkaline with high content of Mg, while Ruhondo had higher electrical conductivity than Burera. Phosphorus and nitrogen exceeded Class III EPA standards indicating that both lakes are at risk of eutrophication. Keywords: water quality, lakes Burera and Ruhondo, Rwanda

scholarly journals Water quality in Lake Xochimilco, Mexico: zooplankton indicators and Vibrio cholerae

2015 ◽  
Author(s):  
Sarma Nandini ◽  
Pedro Ramirez García ◽  
S.S.S. Sarma
Keyword(s):  
Water Quality ◽  
Vibrio Cholerae ◽  
Chlorophyll A ◽  
Local Population ◽  
Secchi Depth ◽  
Treatment Plant ◽  
Nitrogen And Phosphorus ◽  
Physico Chemical ◽  
Eutrophic Water ◽  
Depth Water

<p>Lake Xochimilco is a eutrophic water body in Mexico City used by the local population for aquaculture and agriculture. Water level is maintained with inputs of partially treated waste water from the Cerro de la Estrella treatment plant. In this study we analysed the water quality at two sites of Lake Xochimilco, Lake Xaltocan and the Santa Cruz Canal using various indicators such as zooplankton diversity, saprobic indices, bacterial concentrations and physico-chemical variables. Eighty litres of water was filtered from Lake Xochimilco from each site, once a month from March to October of 2012, and the rotifers, cladocerans and copepods were enumerated and identified. Physico-chemical parameters such as temperature, pH, Secchi depth, water depth, nitrogen and phosphorus and chlorophyll a concentrations, and bacterial densities were measured. During the study we recorded 33 species of rotifers, the most abundant being <em>Brachionus angularis</em>, <em>B. calyciflorus</em> and <em>B. havanaensis</em>.  Among the microcrustaceans the most abundant were the cladoceran <em>Moina micrura</em> and the copepods <em>Acanthocyclops americanus</em> and <em>Arctodiaptomus dorsalis</em>. The species diversity was around 2 bits/ind. and the saprobic index between 1.5-2.0, indicating that both sites were β meso-saprobic.  At both sites nitrogen was &lt;1 mg/L and phosphorus ranged between 2.5-7.8 mg/L. Chlorophyll a concentrations were between 66-136 µg/L. The toxigenic (<em>Vibrio cholerae </em>No-O1/No-O139) and the non-toxigenic (<em>Vibrio cholerae </em>No-O135) strains of the bacterium were recorded, closely associated with littoral rotifers and cladocerans particularly <em>Brachionus quadridentatus</em> and  <em>Alona</em> sp. All variables indicate that these sites in Lake Xochimilco are eutrophic and highly contaminated and that the water quality needs to be improved.<strong></strong></p>

scholarly journals Study on Some Physico-Chemical Characteristics of Ground Water of District Rampur - A Statistical Approach

2007 ◽  
Vol 4 (2) ◽  
pp. 162-165 ◽  
Author(s):  
Susheel Kumar Sindhu ◽  
Amit Sharma
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Statistical Approach ◽  
Total Dissolve Solid ◽  
Water Quality Monitoring ◽  
Total Hardness ◽  
Physico Chemical ◽  
Tube Wells ◽  
Domestic Purpose

A systematic study has been carried out to explore the water quality index of ground water of various tehsils of Rampur district. Twenty five water samples from tube wells, open wells and hand pumps at various locations were collected and analyzed for pH, nitrate, turbidity, total dissolve solid, chlorides, total hardness, alkalinity and fluoride. In this study overall water quality of Rampur district is very poor and unsuitable for drinking purpose. Water quality of Bilaspur, Shahabad and Rampur city shows that water may not be used for drinking as well as domestic purpose. Present study recommends that the top priority should be given to water quality monitoring and indigenous technologies should be adopted to make water fit for drinking after treatment such as defluoridation, desalination.

scholarly journals QUALIDADE DAS ÁGUAS URBANAS NO CÓRREGO VICENTE PIRES – DISTRITO FEDERAL

2021 ◽  
Vol 9 (1) ◽  
pp. 47
Author(s):  
Maria elisa Leite Costa ◽  
Sérgio Koide ◽  
Daniela Junqueira Carvalho ◽  
Jeremie Garnier
Keyword(s):  
Water Quality ◽  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Federal District ◽  
Water Quality Monitoring ◽  
Nitrogen And Phosphorus ◽  
Total Solids ◽  
Containment Measures ◽  
Distrito Federal

<p>Entre fevereiro de 2018 e janeiro de 2020, foi realizado o monitoramento hidrológico e de qualidade da água do Córrego Vicente Pires, localizado em uma zona urbana do Distrito Federal, a fim de avaliar as alterações na qualidade da água a partir da determinação de parâmetros físico-químicos, em eventos nos períodos seco e chuvoso. Foram elaborados polutogramas para os parâmetros de condutividade (elétrica), turbidez, pH, sólidos, demanda química de oxigênio e nutrientes (nitrogênio e fósforo), associados aos hidrogramas dos mesmos eventos, com vazões variando de 0,5 m³/s a 72,2 m³/s. O monitoramento dos eventos de cheia obteve concentrações de sólidos totais de até 7.583 mg/L, fosfato até 0,9 mg/L de PO<sub>4</sub><sup>3 </sup>e demanda química de oxigênio de até 958 mg/L. No período de estiagem, devido à menor disponibilidade de água no córrego, não há diluição de poluentes e  ressalta-se a concentração de nitrato (NO<sub>3</sub>até 9 mg/L)  em função dos lançamentos de esgotos domésticos no córrego. No período chuvoso, evidenciam-se os sólidos totais associados à lavagem da superfície e erosão do solo por grandes volumes gerados no escoamento superficial. Esses resultados expõem a necessidade de investimentos em infraestrutura de coleta de esgoto e drenagem urbana, inclusive, na adoção de medidas de contenção de sedimentos durante a realização de obras.</p><p><strong>Palavras-chaves:  </strong>Monitoramento hidrológico; Polutograma; Cheias.</p><p> </p><h2 align="center">URBAN WATERQUALITY IN THE VICENTE PIRES STREAM – FEDERAL DISTRICT</h2><p><strong>Abstract</strong></p><p>Between February 2018 and January 2020, hydrological and water quality monitoring of Vicente Pires Stream, located in the urban area of the Federal District, was carried out in order to assess the changes in water quality from the determination of physical-chemical parameters during events in the dry and rainy periods. Polutographs were prepared for parameters such as (electric) conductivity, turbidity, pH, solids, chemical oxygen demand and nutrients (nitrogen and phosphorus), associated with hydrographs of the same events, with flows that ranged from 0.5 m³/s to 72.2 m³/s. The monitoring of flood events showed concentrations of total solids up to 7,583 mg/L, phosphate up 0,9 mg/L PO43 and chemical oxygen demand up to 958 mg/L. During the dry season, due to the lower availability of water in the stream, there is no dilution of pollutants and the nitrate concentration stands out (NO3 up to 9 mg/L), due to discharges of domestic sewage into the stream. In the rainy season, the total solids associated with the washing of the surface and soil erosion by large volumes of runoff stand out. These results expose a need for investment in sewage collection and urban drainage infrastructures, including the adoption of sediment containment measures during the execution of construction.</p><p><strong>Keywords:</strong> Hydrological monitoring; Polutograph; Floods.</p>

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.

Wetland Ecosystem Monitoring Through Water Quality Perspectives

2022 ◽  
pp. 51-70
Author(s):  
Shahid Ahmad Dar ◽  
Sami Ullah Bhat ◽  
Sajad Ahmad Dar
Keyword(s):  
Water Quality ◽  
Field Testing ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
Physical Parameters ◽  
Chemical Parameters ◽  
Ecosystem Monitoring ◽  
Physico Chemical

Water quality monitoring is an important tool in determining the safety and suitability of water for various desired and intended uses. The procedures involved in the evaluation of water quality are numerous and multifaceted. Therefore, taking into consideration the specific objectives of water quality monitoring, sampling design is of vital importance. Most of the physical parameters of water quality are determined via in-situ measurements using modern testing equipment/field testing kits. Although there are some good field-based sensors that are being used for evaluation of water quality, the chemical parameters traditionally are mostly analyzed through laboratory-based experiments. This chapter is aimed to offer an inclusive knowledge and insights on the importance and assessment of physico-chemical parameters that are of high priority for monitoring the water quality of wetlands.

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