Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Arumugam, Phillip T.; Furtado, J. I.

doi:10.1007/bf00015484

Cited by 13 publications

(4 citation statements)

References 7 publications

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“…Sreenivasan (1964) have reported that the blooming of phytoplankton occurs in summer season. Arumugan and Furtado (1980) have observed similar pattern in some temperate and tropical reservoirs. Bharadwaja (1940) has also pointed out temperature and light as the factors responsible for the higher population of phytoplankton.…”

Section: Discussionsupporting

confidence: 74%

Dynamics of phytoplankton in relation to physico-chemical factors of Almatti reservoir of Bijapur District, Karnataka State

Hulyal

Kaliwal

2008

Environ Monit Assess

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The present investigation deals with limnobiotic status of the Almatti reservoir from February, 2003 to January, 2005. The study revealed that there exists a fluctuations of the physical factors viz., rainfall, humidity, air and water temperature, pH and electrical conductivity (EC), and chemical factors viz., dissolved oxygen (DO), free carbon dioxide, total alkalinity, total hardness, calcium, magnesium, chloride, nitrate, phosphate, sulphate, bicarbonate and total dissolved solids (TDS). From the data it was also apparent that correlations between the physico-chemical factors and dynamics of phytoplankton could be seen. The simple correlation coefficient test revealed that the cyanophytes number was positively correlated with DO, nitrate, phosphate and negatively significant with total hardness, total alkalinity, EC, calcium, magnesium, sulphate, bicarbonate and TDS. They are inversely correlated with pH, chloride, rainfall and humidity. Bacillariphyceae are correlated with total alkalinity, bicarbonates, magnesium and TDS, whereas inverse correlation was found with rainfall, humidity, pH and phosphate. Desmids showed positive correlation with nitrates, while it was inversely correlated with chloride, rainfall and humidity. Dinophytes density was positively correlated with total alkalinity, EC, total hardness, calcium, bicarbonate, while it showed inverse correlation with rainfall, humidity and phosphate. However, it is obvious that the absence of significant difference between sampling stations for all these parameters in the Almatti reservoir indicated fairly homogeneous conditions and the water quality is also found to be homogeneous.

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Section: Discussionsupporting

confidence: 74%

Dynamics of phytoplankton in relation to physico-chemical factors of Almatti reservoir of Bijapur District, Karnataka State

Hulyal

Kaliwal

2008

Environ Monit Assess

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“…Significant (p < 0.05) gradual decrease in dissolved oxygen (DO) and DO (% Sat.) concentrations, along the water column from surface towards the bottom of the lake could be linked with higher photosynthetic activities at the surface and/or the higher decomposition processes at the bottom of the lake [22] [24] [25]. There was total oxygen depletion (anoxic condition) at the bottom of the lake in April 2007.…”

Section: Discussionmentioning

confidence: 99%

The Physico-Chemical Water Quality of the Obafemi Awolowo University Teaching and Research Farm Lake, O.A.U. Campus, Ile-Ife, Southwest, Nigeria

Aduwo¹,

Adeniyi²

2019

JEP

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The physico-chemical water quality of the Obafemi Awolowo University Teaching and Research Farm Lake, Ile-Ife, Nigeria, was studied over an annual cycle (September 2006 to August 2007) almost 40 years after its impoundment in 1967. This was with a view to obtaining the then current state of physico-chemical water quality parameters with their variations in time and space as well as using some of the data obtained to evaluate the aging process of the lake for the 40 years of its existence. There was no significant (p > 0.05) horizontal variation (i.e. upstream-dowstream) in the physico-chemical characteristics of the lake whereas, Apparent-color, True color, Turbidity, Total Suspended Solids (TSS), Total Solids (TS) and Total Acidity increased significantly (p < 0.05) from the lake surface towards the bottom of the lake. On the other hand, water pH, Dissolved Oxygen (DO); Dissolved Oxygen Saturation (DO% Sat.) and Biochemical Oxygen Demand (BOD 5) decreased significantly (p < 0.05) from the lake surface towards the bottom of the lake. Dissolved Oxygen (DO), Dissolved Oxygen Saturation (DO% Sat.) and Nitrate ion (3 NO −) were significantly higher (p < 0.05) in the dry season than in the rainy season while, True colour, pH, Conductivity, Total Hardness, Calcium ion (Ca 2+), Magnesium ion (Mg 2+), Potassium ion (K +) and Sulphate ion (2 4 SO −) were significantly higher (p < 0.05) in the rainy season than in the dry season. The lake water could be regarded as shallow, coloured, turbid, less transparent, slightly acidic, soft and well-buffered fresh-waterbodies with evidence of aging (i.e. transforming the lake from an oligotrophic status to a eutrophic waterbody). The results indicated that the lake is suitable for most of its applications with little or no adjustments as the case may be; except probably for drinking purposes where some microbial analysis may be necessary.

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“…Indeed, variable weather conditions can result in the lack of any definite seasonal pattern of thermal behaviour. Tropical reservoirs are particularly sensitive to changing weather conditions, not least to heavy rainfalls which can destratify the lake (Arumugam and Furtado, 1980) or even prevent stratification (Imevbore, 1967). Near the equator, stratification can be particularly weak, and mechanical mixing induced by wind regulates the mixing process.…”

Section: Reservoir Maturationmentioning

confidence: 99%

Water quality characteristics of regulated rivers

Petts

1986

Progress in Physical Geography: Earth and Environment

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Rivers are complex physical, chemical and biological systems determined by processes operating not only within the confines of the channel but also -and perhaps more importantly -on and within the hillslopes of the drainage basin.From headwaters to mouth exists a gradient of physico-chemical factors that exerts a direct control upon the biological strategies and dynamics of river systems, as encompassed in the River Continuum Concept (Vannote et al., 1980). Dams interrupt the pattern of downstream transfers producing discontinuities along the stream continuum (Ward and Stanford, 1983). For the highest level of ecological investigation, namely studies of fish productivity, water quality is only one of eight groups of factors that interact to influence the character of impounded rivers (Petts, 1984). Nevertheless, river impoundment can exert an important influence upon water quality for tens, and in some instances hundreds, of kilometres below a dam. Moreover, the effects can extend not only to the river but also to the nearshore zone.The effect of reservoirs on water quality has been an important focus of research since the late 1950s but it is only since 1979, as a result of the First International Symposium on Regulated Streams, held at Erie, USA (Ward and Stanford, 1979), that researchers have become aware of the full consequences of impoundment for the river downstream. Today, dams are being completed at a rate of two each day (Mermel, 1976), some countries are experiencing increasing dambuilding activity, notably, Argentina, Canada, Spain, India and China (Mermel, 1981), andCroome et al. (1976) have suggested that by the year 2000, about 66 per cent of the world's total streamflow will be controlled by dams. Similar physical and biological processes are operative in large and small reservoirs, although they show profound differences in limnology and management. Furthermore, the effects of an impoundment of particular dimensions will depend upon its geographical location. Reservoirs have been built on rivers in subarctic, temperate and tropical regions, and in arid areas traversed by exogenous streams, such as the River Nile. Spatial variations in water quality are conditioned, within climatic regions, by catchment characteristics, not the least important of which are geology and land use (Gower, 1980). At the global scale, Gibbs ( 1970) classified rivers into three geographical groups by reference to both climate and geology, each of them

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Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Cited by 13 publications

References 7 publications

Dynamics of phytoplankton in relation to physico-chemical factors of Almatti reservoir of Bijapur District, Karnataka State

Dynamics of phytoplankton in relation to physico-chemical factors of Almatti reservoir of Bijapur District, Karnataka State

The Physico-Chemical Water Quality of the Obafemi Awolowo University Teaching and Research Farm Lake, O.A.U. Campus, Ile-Ife, Southwest, Nigeria

Water quality characteristics of regulated rivers

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