The Effects of Development of a Tidal Barrage Upon the Water and Sediment Quality of the Mersey Estuary (U.K.) and its Biota

1988 ◽  
Vol 20 (6-7) ◽  
pp. 229-233 ◽  
Author(s):  
D. C. Hockin ◽  
D. M. Parker
Keyword(s):  
Sediment Quality ◽  
Nutrient Status ◽  
Pollution Load ◽  
Environmental Significance ◽  
Tidal Power ◽  
Water And Sediment Quality ◽  
Faecal Bacteria ◽  
Recreational Use ◽  
Mersey Estuary

The prime constraint upon the development of a tidal power generating barrage is the use of the Mersey estuary as a waste disposal facility. Historical disposal of persistent wastes continues to cause environmnetal problems, even though modern practices have resulted in a reduced pollution load. Mercury and lead have the greatest environmental significance, although with reference to barrage operation the nutrient status and increased transmission of light through less turbid water will be of equal or greater importance. A constraint upon the recreational use of the impounded water body will be the unacceptable numbers of faecal bacteria. A criterion for the design of the barrage should be the maximisation of the volume of water entering on each tidal cycle to disperse nutrients and pollutants and import as much oxygen as possible. This will minimise the increase of retention time and reduce the probability of methylation of mercury within the sediment. Additionally it will have implications for the feeding behaviour of the internationally important wildfowl populations.

Sewers and the Quality of Canals and Ditches in Amsterdam

1993 ◽  
Vol 27 (5-6) ◽  
pp. 61-67 ◽  
Author(s):  
E. Jacobs ◽  
J. W. van Sluis
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Sediment Quality ◽  
Water System ◽  
Water Systems ◽  
Sewer System ◽  
Water And Sediment ◽  
Combined Sewer ◽  
Water And Sediment Quality

The surface water system of Amsterdam is very complicated. Of two characteristic types of water systems the influences on water and sediment quality are investigated. The importance of the sewer output to the total loads is different for both water systems. In a polder the load from the sewers is much more important than in the canal basin. Measures to reduce the emission from the sewers are much more effective in a polder. The effect of these measures on sediment quality is more than the effect on water quality. Some differences between a combined sewer system and a separate sewer system can be found in sediment quality.

scholarly journals POLLUTION EFFECTS ON THE ENVIRONMENT, MACROPHYTES AND FISHES IN THE SAPUCAIA STREAM, GUAiBA HYDROGRAPHIC BASIN, RS, BRAZIL

2005 ◽  
Vol 13 (13) ◽  
pp. 27-43
Author(s):  
Tania R. Prochnow ◽  
Bernardo Liberman ◽  
Nadia T. S. Pfeifer ◽  
Marilene G. Porawski ◽  
Norma Marroni ◽  
...  
Keyword(s):  
Metal Accumulation ◽  
Sediment Quality ◽  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Pollution Effects ◽  
Hydrographic Basin ◽  
Water And Sediment ◽  
Water And Sediment Quality

This paper shows the results of air, water and sediment quality of Sapucaia stream, which belongs to Guafba Hydrographic Basin, in the State of Rio Grande do Sul, Southern Brazil. The correlations among the concentrations of Al, Cu, Fe, Mn, and Zn, present in the atmosphere, water and sediments, and their bioaccumulation in macrophytes are determined. Different degrees of pollution is characterized through the study of oxidative damage in fishes. The results indicate metal accumulation in macrophytes and fishes.

scholarly journals Variations in selected water quality variables and metal concentrations in the sediment of the lower Olifants and Selati rivers, South Africa

Koedoe ◽  
1994 ◽  
Vol 37 (2) ◽  
Author(s):  
T. Seymore ◽  
H.H. Du Preez ◽  
J.H.J. Van Vuren ◽  
A. Deacon ◽  
G. Strydom
Keyword(s):  
Water Quality ◽  
Sediment Quality ◽  
Metal Concentrations ◽  
Water And Sediment ◽  
Water And Sediment Quality ◽  
Special Concern ◽  
Olifants River ◽  
Western Side ◽  
Physical And Chemical

A survey of the water and sediment quality of the lower Olifants River and lower Selati River was carried out. Metal concentrations (Cr, Cu, Fe, Mn, Ni, Pb, Sr and Zn) in the water and sediment, as well as the physical and chemical characteristics of the water were determined over a two-year period (April 1990 - February 1992). The water quality of the lower Selati River, which flows through the Phalaborwa area, was found to be influenced by the mining and industrial activities in the area. It was also the case with the lower Olifants River after the Selati-Olifants confluence, although the concentrations of most variables did decrease from the western side of the Kruger National Park to the eastern side due to dilution of the water by tributaries of the Olifants River. Variables of special concern were sodium, fluoride. chloride, sulphate, potassium, the total dissolved salts and the metal concentrations (except strontium). The water quality of the Selati River in the study area is a great cause of concern and a further degradation thereof cannot be afforded.

scholarly journals Assessment of the Water and Sediment Quality of Tropical Forest Streams in Upper Reaches of the Baleh River, Sarawak, Malaysia, Subjected to Logging Activities

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Teck-Yee Ling ◽  
Chen-Lin Soo ◽  
Jagath-Retchahan Sivalingam ◽  
Lee Nyanti ◽  
Siong-Fong Sim ◽  
...  
Keyword(s):  
Water Quality ◽  
Suspended Solids ◽  
Sediment Quality ◽  
Ammonia Nitrogen ◽  
Large Temperature ◽  
Water And Sediment ◽  
Water And Sediment Quality ◽  
Forest Streams ◽  
The Impact

The study of the impact of logging activities on water and sediment quality of Sarawak forest streams is still scarce despite Sarawak being the largest exporter of timber in Malaysia. This study was aimed at determining the water and sediment quality of forest streams in Sarawak and the potential impact of logging activities. In situ parameters were measured, and water and sediment samples were collected at six stations before rain. Additionally, water quality was investigated at three stations after rain. The results showed that canopy removal resulted in large temperature variation and sedimentation in the forest streams. Lower suspended solids were found at stations with inactive logging (<2 mg/L) compared to active logging (10–16 mg/L) activities. The highest concentration of total nitrogen and total phosphorus in water and sediment was 4.4 mg/L, 77.6 μg/L, 0.17%, and 0.01%, respectively. Besides, significantly negative correlation of sediment nitrogen and water total ammonia nitrogen indicated the loss of nitrogen from sediment to water. Water quality of the streams deteriorated after rain, in particular, suspended solids which increased from 8.3 mg/L to 104.1 mg/L. This study reveals that logging activities have an impact on the water quality of Sarawak forest streams particularly in rainfall events.

Percentage land use in the watershed determines the water and sediment quality of 22 marshes in the Great Lakes basin

1999 ◽  
Vol 56 (10) ◽  
pp. 1781-1791 ◽  
Author(s):  
Barb Crosbie ◽  
Patricia Chow-Fraser
Keyword(s):  
Land Use ◽  
Great Lakes ◽  
Best Management Practices ◽  
Agricultural Land ◽  
Sediment Quality ◽  
Soluble Reactive Phosphorus ◽  
Agricultural Runoff ◽  
Water And Sediment ◽  
Water And Sediment Quality

Data from 22 Ontario marshes were used to test the hypothesis that distribution of forested, agricultural, and urban land in the watershed determines the water and sediment quality of Great Lakes wetlands. The first three components of the principal components analysis explained 82% of the overall variation. PC1 ordinated wetlands along a trophic gradient; species richness of submergent vegetation decreased with PC1 scores. PC2 reflected the content of inorganic solids and phosphorus in sediment and the ionic strength of the water. Both PC1 and PC2 scores were positively correlated with percent agricultural land, whereas PC1 scores were negatively correlated with forested land. Correlation between PC1 and agricultural land improved when best-management practices were considered. Accounting for common carp (Cyprinus carpio) disturbance did not confound the relationship between land use and water quality. PC3, driven by soluble reactive phosphorus and nitrate nitrogen concentration in the water, was not correlated with land use. Concentrations of polycyclic aromatic hydrocarbons and Metolachlor were correlated with urban and agricultural land, respectively, and may be useful as land use surrogates. Watershed management favouring the retention of forested land, or creation of buffer strips to trap agricultural runoff in the drainage basin, should help maintain aquatic plant diversity in coastal wetlands.

scholarly journals Using benthic diatom assemblages to assess sedimentary nutrient status in Tri An reservoir, Dong Nai province, Vietnam

2021 ◽  
Vol 5 (2) ◽  
pp. first
Author(s):  
Yến Thị Hoàng Trần ◽  
Thái Thành Trần ◽  
Quảng Xuân Ngô ◽  
Hà Mạnh Bùi ◽  
Lưu Thanh Phạm
Keyword(s):  
Sediment Quality ◽  
Nutrient Status ◽  
Biological Indicators ◽  
Underground Water ◽  
Benthic Diatom ◽  
Diatom Assemblages ◽  
Nutrient Contents ◽  
High Nutrient ◽  
Nutritional Compounds

Tri An Reservoir plays an important role in the water supply for Dong Nai province and Ho Chi Minh city. It also contributes significantly to increase underground water reserves in the vicinity, especially in the dry season. However, recently, the increase of nutritional compounds in the lake has contributed to eutrophication, causing serious deterioration of the quality of the environment, creating conditions for microalgae to thrive. Therefore, this study aimed to evaluate and zoning the sediment quality of the Tri An reservoir based on using benthic diatom communities as biological indicators as an indicator tool. Sediment and algae samples were collected from 8 survey locations in the Ho Tri An area from March to August in 2019. The results showed that the dominance of several species belonging to the genera that prefer to live in nutrient-rich environment such as Navicula, Nitzschia. The TDI index indicated the sediment environment had high nutrient contents. Water quality in the lower section of the reservoir was classified from eutrophic (even hyper-eutrophic) status, particularly stations into the reservoir. Meanwhile, upstream and downstream sites had lower nutrient levels, mainly excessive phosphorus but still in eutrophic class. Additionally, the initial analysis results also revealed that NH4 +, TN, PO4 3􀀀 and DO played a major role to regulate the development of benthic diatom assemblages.

scholarly journals An Assessment of Water and Sediment Quality of River in India with Special Reference to Pesticide Contamination, a Case Study

2018 ◽  
Vol 7 (3.8) ◽  
pp. 97
Author(s):  
Divya A.H ◽  
P A. Soloman
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Bottom Sediment ◽  
Sediment Quality ◽  
Temporal Distribution ◽  
Water Quality Monitoring ◽  
Human Beings ◽  
Water And Sediment Quality

Drinking water quality has become a serious issue in many countries due to the scarcity of fresh water resources. Water quality monitoring is the first step for the management and conservation of aquatic system. The contamination of OrganoChlorine Pesticides (OCPs) is very harmful for the environment and human beings. The presence of OCPs in surface water and in the bottom sediment in the Chalakudy River was investigated to evaluate the pollution load and distribution level of OCP seasonally over a period of 3 years from January 2013 to December 2015. Surface water sample and bottom sediment were collected from nine different sites (upstream, midstream and downstream) and analyzed for their profile of important physicochemical parameters and for persistence of OCP. To know the present trends in the river clearly ,temporal  distribution  and spatial distribution of OCPs and other parameters are studied based on three season(winter, summer, and monsoon).Obtained trend in each  year  were compared  through sampling and analysis.   

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