scholarly journals Preliminary Study on Water Quality and Heteropterans Diversity in a Semi-Urban Stream (Central Region of Cameroon)

2021 ◽  
Vol 2 (2) ◽  
pp. 86-97
Author(s):  
Jean Dzavi ◽  
Samuel Foto Menbohan ◽  
Blaise Rollinat Mboye ◽  
Leonelle Tsowa Pianta ◽  
Audrey Glwadys Nzépang Tchizé ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Physicochemical Parameters ◽  
Sampling Frequency ◽  
Urban Stream ◽  
Total Hardness ◽  
Total Abundance ◽  
Taxonomic Richness ◽  
Preliminary Study ◽  
Hydrological Variables

A study was conducted in the Konglo stream for six months to make an inventory of aquatic heteroptera, following a monthly sampling frequency. Some hydrological and physicochemical parameters such as water width, current velocity, and water flow, water temperature and pH, electrical conductivity, dissolved oxygen, total hardness, phosphates, nitrates, and ammonia were measured according to standard methods. For an inventory of the heteropterans, the multihabitat approach was used during sampling, but only heteropterans representing 3.15 % of total abundance are considered in this study. The hydrological variables were different in each station. The water width and flow were increased from upstream to downstream. The results showed that pH, total hardness, nitrites, phosphates, and ammonia values ​​were weak and no significant differences were observed. Among physicochemical variables, only dissolved oxygen and electrical conductivity were different between upstream and downstream. The conductivity increased from upstream to downstream while the dissolved oxygen was very low downstream. 62 individuals were collected and counted belonging to 11 taxa, the most abundant being Ranatra linearis. The other taxa such as Anisops sp., Aphelocheirus aestivalis, Gerris sp., Gerridae Nd., Hydrometra sp., Ilyocoris cimicoides, Naucoris sp., Nepa sp., Notonectidae Nd., and Velia sp. were poorly represented. High abundance was recorded at the upstream (38 individuals), but the taxonomic richness (3 taxa) and diversity (0.24 bits/ind) remain low, unlike the stations located downstream (7 taxa and 1.82 bits/ind).

scholarly journals Changing trends of physicochemical parameters in Kaptai lake of Bangladesh

2015 ◽  
Vol 2 (2) ◽  
pp. 319-327 ◽  
Author(s):  
Md Abul Bashar ◽  
S Sanjib Basak ◽  
Kazi Belal Uddin ◽  
AKM Saiful Islam ◽  
Yahia Mahmud
Keyword(s):  
Dissolved Oxygen ◽  
Water Temperature ◽  
Physicochemical Parameters ◽  
Mean Value ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Secchi Disc ◽  
Changing Trends ◽  
Test Kit ◽  
Baseline Information

Physicochemical parameters were studied for a period of two years from July 2012 to June 2014. The parameters namely air and water temperature were estimated using centigrade thermometer, transparency using secchi disc while pH, CO2, total hardness, total alkalinity, dissolved oxygen (DO) were estimated using HACH water test kit. The highest air and water temperature (31.52°C and 30.38°C) were recorded in September, 2013 whereas the lowest air and water temperature 21.04°C and 20.42°C were recorded in January, 2014. The pH of water was found to alkaline in nature (6.9 to 8.20). The maximum free CO2 value (7.81 mg/l) was recorded in February, 2014 and minimum (2.36 mg/l) in November, 2012.The value of total alkalinity was found to fluctuate from 51.9 mg/l in December 2012 to 90.68 mg/l in December 2013. Total hardness of lake water varied from 37.8 (August) to 47.3 (November) in 2012 and 55.17 (July) to 87.49 (February) in 2013-14 with regular trends in fluctuation. Mean secchi disc reading varied from 1.94±.57 m in 2012-13 and 2.02±0.40 m in 2013-14. Dissolved oxygen was found to vary from 6.10 (February) to 6.80 (November) during 2012, 3.90 (February) to 6.38 mg/l (July) during 2013 with a mean value of 6.4±1.51 and 5.74±0.68 mg/l. Water depth was found to fluctuate from 4.39 to 11.76 m with a mean value of 7.96± 2.56 m for one year study. The present research provides baseline information on changing trends of physicochemical parameters of Kaptai Lake which will facilitate sustainable management and conservation of this lake ecosystem.Res. Agric., Livest. Fish.2(2): 319-327, August 2015

Some effects of the 1982-83 drought on water quality and macroinvertebrate fauna in the lower La Trobe River, Victoria

1987 ◽  
Vol 38 (2) ◽  
pp. 289 ◽  
Author(s):  
BC Chessman ◽  
DP Robinson
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Dissolved Oxygen Concentration ◽  
Taxonomic Richness ◽  
Aquatic Macroinvertebrate ◽  
Causative Factors ◽  
Prolonged Drought ◽  
Before And After ◽  
Macroinvertebrate Fauna

Following severe and prolonged drought, flows in parts of the lower LaTrobe River reached record lows in February 1983. Consequent lack of dilution for wastewater discharges resulted in marked deterioration of water quality, with dissolved oxygen concentration dropping to 2 g m-3 and electrical conductivity rising to 115 mS m-1. Despite these changes there was little alteration in the taxonomic richness or composition of the aquatic macroinvertebrate fauna. Faunal richness in the river downstream from Yallourn was low both before and after the drought, but the causative factors remain obscure.

scholarly journals Typology of the Phytoplankton Community of Dohou Lake, Drinking Water Supply Source in Duékoué Town (Western Côte d’Ivoire)

2020 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
ATTOUNGBRE Kouakou Séverin ◽  
NIAMIEN-EBROTTIE Julie Estelle ◽  
KOUAMÉ Kouamé Martin ◽  
BOUSSOU Koffi Charles ◽  
ALIKO N’Guéssan Gustave ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Rainy Season ◽  
Physicochemical Parameters ◽  
Phytoplankton Community ◽  
Dry Season ◽  
Taxonomic Richness ◽  
Supply Source ◽  
Total Phytoplankton

The objective is to study the phytoplankton community of Dohou Lake in order to contribute to the knowledge of its ecological quality. For this purpose, monthly samplings were carried out annually between October 2017 and September 2018. The studied physicochemical parameters (Temperature, Electrical conductivity, pH, Dissolved oxygen, Transparency, Depth, Total nitrogen, Nitrate, Nitrite, Total phosphorus) varied significantly over time. During the rainy season months, Dohou Lake is influenced by high values of total phosphorus, total nitrogen, conductivity, nitrate, pH, transparency and depth. However, in the dry season, the lake is characterized by high values of temperature, nitrite, dissolved oxygen and conductivity. For the phytoplankton community, 373 phytoplankton taxa divided into 111 genera, 51 families, 24 orders, 11 classes and 7 phyla (Chlorophyta, Euglenophyta, Cyanobacteria, Bacillariophyta, Pyrrophyta, Chrysophyta and Xanthophyta) have been identified. Chlorophyta with 50.67% is the most represented in the taxonomic richness of the environment. Total phytoplankton densities oscillate between 100 105 cells / L (August) and 321 105 cells / L (February) with high proportions of Cyanobacteria greater than 45% during each month of the rainy season. The highest values of Shannon and Equitability diversities are observed during the dry season months.

scholarly journals How Physicochemical Parameters of Water Change with Distance in a Lake: Case Study Lake Bunyonyiinkigezi

2021 ◽  
Vol 7 (4) ◽  
pp. 1-22
Author(s):  
Mukasa Tebandeke I.Z ◽  
Karume I ◽  
Ssebuwufu J ◽  
Wasajja H.Z ◽  
Nankinga R ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Oxygen Demand ◽  
Agricultural Practices ◽  
Aquatic Organisms ◽  
Total Hardness ◽  
Ambient Temperatures ◽  
High Chemical Oxygen Demand ◽  
Whatman Paper

Pollution resulting from unsustainable agricultural and urbanization activities in the Ruhezamyenda and Bunyonyi catchments are threatening lake Bunyonyi. These have led to high chemical oxygen demand (COD), electrical conductivity, turbidity, pH, iron (II) concentration and low dissolved oxygen (DO5). In this study we have investigated the how COD, turbidity, pH, concentration of iron, total suspended solids, total nutrients and DO5 of water changed with distance in lake. Water sampled from different distances in the lake filtered using Whatman paper at ambient temperatures was tested for COD, electrical conductivity, turbidity, total nutrients, iron, hardness and DO5. COD was 20.8±.0.03mg/L to 16 ± 0.03mg/L; total hardness was 16.5±0.2 mg/L to 18.6 ± 0.3 mg/L total nitrate was 103.5± 2 mg/L to 88 ± 3 mg/L; total phosphate was 100.8 ±.2.5 to 87± 3 mg/L; high TSS values from 3.4 ± 0.1 mg/L to 2.5 ± 0.1 mg/L showed contamination of water. As pH decreased from 8.3 ± 0.03 to 7.6 ± 0.04 revealed that bases were getting removed. The turbidity dropped from 25.7 ± 0.3 NTU to 20 ± 2 NTU due settling down of sediments. Iron (II) concentration ranging from 1.1± 0.1 to 0.8± 0.1 mgL-1 . Dissolved oxygen decreased from 7.9 ±0.3 mg/L to 4.8 ± 0.2 mg/L indicating surface water can uphold life of aquatic organisms. Total hardness ranged from 0.22± 0.05 to 0.19± 0.05 mg/L Electrical conductivity was high and ranged from 130± 5 to 150± 5 µS/cm indicating presence of electrolytes. Lake Bunyonyi water is not greatly polluted, but requires to be safe guarded against poor unsustainable agricultural practices, sewage draining from towns, schools and hotels in nearby settlements.

scholarly journals Physicochemical Analysis of Ground Water Samples of South Coastal Areas of Kanniya kumari in the Post-Tsunami Scenario

2016 ◽  
Vol 13 (2) ◽  
pp. 116-121
Author(s):  
Krishna Arunachalam ◽  
Monikandon Sukumaran ◽  
Mohammad Tanveer ◽  
Kesavan Devarayan
Keyword(s):  
Electrical Conductivity ◽  
Ground Water ◽  
Physicochemical Parameters ◽  
Tamil Nadu ◽  
Total Dissolved Solids ◽  
Physicochemical Analysis ◽  
Total Hardness ◽  
Sodium Potassium ◽  
Calcium Magnesium

In this study, the effect of ‘natural/self cleaning’ of ground water by precipitation after a decade of tsunami is evaluated along the coast of Kanniyakumari district, Tamil Nadu, India. The samples were collected from five stations namely Colachel, Muttom, Periyakadu, Manakudy, and Kanniyakumari. The physicochemical parameters such as turbidity, total dissolved solids, electrical conductivity, pH, alkalinity, total hardness, calcium, magnesium, sodium, potassium, chloride, and fluoride were evaluated and compared with the database of the pre-tsunami sample collected in 2004. The results indicated that the ‘natural cleaning’ has improved the quality of the ground water over the years after tsunami.

scholarly journals Water hydrochemistry of Lake Boudaroua in the Moroccan Prerifwest Mediterranean region

2021 ◽  
Vol 234 ◽  
pp. 00078
Author(s):  
Hicham En-nkhili ◽  
Issam Etebaai ◽  
Khadija El kharrim ◽  
Driss Belghyti
Keyword(s):  
Surface Water ◽  
Dissolved Oxygen ◽  
Physicochemical Parameters ◽  
Quality Parameters ◽  
World Health ◽  
Total Hardness ◽  
Rate Variation ◽  
Health Organization ◽  
The Impact

In order to assess the quality of surface water of Boudaroua Lake, located in the Moroccan Pre-rif.The water quality parameters was used to evaluate the potential presence of toxicity of this ecosystem. To this end, samples and hydrochemical analyzes were carried out for five permanent stations around the Lake, during the study period (July 2019, October 2019, January 2020). The study was based on 11 parameters, namely, turbidity (TUR), dissolved oxygen (O2), total hardness (DT), calcium (Ca2+),magnesium(Mg2+), sodium (Na+),potassium (K+), ammonium (NH+4), chloride(Cl−), sulfate( SO2−4), nitrate (NO-3)were considered. The results obtained of these physicochemical parameters have been compared with the Moroccan standard (MS) for surface water and with the World Health Organization (WHO). The results indicated that the values of the physicochemical parameters varies significantly seasonally due to precipitation rate variation. In addition the impact of Agricultural pollution resulting from the excessive use of fertilizers that enter the lake through waterways, such as ammonium NH+4, and dissolved oxygen (O2) its value reaching respectively 1.09 mg/L ,12 mg/L remains above standards (MS) and (WHO) which could harm the ecosystem of the lake.

Chemical Composition Assessment of Sulphurous Waters

2018 ◽  
Vol 69 (5) ◽  
pp. 1037-1040
Author(s):  
Ovidiu Murarescu ◽  
Gica Pehoiu ◽  
Cristiana Radulescu ◽  
Ioana Daniela Dulama ◽  
Sofia Teodorescu ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Dissolved Oxygen ◽  
Mass Spectroscopy ◽  
Water Samples ◽  
Inductively Coupled Plasma ◽  
Physicochemical Parameters ◽  
Total Hardness ◽  
Summer Period ◽  
Inductively Coupled ◽  
Icp Ms

The study aims to assess the chemical composition of sulphurous spring waters collected from Pucioasa � Vulcana Bai balneotherapeutical area, Dambovita County. The sampling were achieved from active and preserved sulphurous sources (i.e. five springs), during the summer period of the year 2016. The content of nine metals (i.e. Cr, Mn, Fe, Co, Ni, Cu, Cd, Zn, and Pb) in water samples was determined by Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS). The relationships between physicochemical parameters (i.e. pH, conductivity, TDS, salinity, total hardness and dissolved oxygen) and metal concentrations were investigated, as well.

scholarly journals Surface Water Pollution around Dhaka Export Processing Zone and Its Impacts on Surrounding Aquatic Environment

2016 ◽  
Vol 8 (3) ◽  
pp. 413-425 ◽  
Author(s):  
M. S. Islam ◽  
A. Sultana ◽  
M. S. Sultana ◽  
M. Shammi ◽  
M. K. Uddin
Keyword(s):  
Dissolved Oxygen ◽  
Aquatic Environment ◽  
Physicochemical Parameters ◽  
Oxygen Demand ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Strong Positive Correlation ◽  
Export Processing Zone ◽  
Processing Zone ◽  
Export Processing

This study based on the physicochemical parameters was conducted in order to determine the pollution status in the aquatic body of Dhaka Export Processing Zone (DEPZ) area. A total of 5 water samples were collected on the basis of their distance from the effluent outlet and were examined. Physicochemical parameters like color, temperature, pH, electric conductivity (EC), total dissolved solid (TDS), total suspended solid (TSS), total hardness, total alkalinity, dissolved oxygen (DO), biochemical oxygen demand (BOD) and chemical oxygen demand (COD) were measured via standard determination method. Physicochemical analyses revealed that most of the water quality parameters exceeded the recommended levels set by the Department of Environment (DoE), Bangladesh. The concentrations were found decreasing with increasing distance from the effluent outlet. A very strong positive correlation was found between BOD and COD in all sampling points. Both BOD and COD values had a strong negative correlation with dissolved oxygen (DO). The results indicated that the surrounding aquatic environment is exceedingly contaminated by various pollutants released from DEPZ which is highly vulnerable for the species on that ecosystem.

scholarly journals Effects of application of copper-based fungicides in cocoa plantations on the abundance and diversity of macroinvertebrates in adjacent rivers in Southwestern Nigeria

2021 ◽  
Vol 23 (2) ◽  
pp. 1-13
Author(s):  
C. O. Adedire ◽  
J. A. Adeyemi ◽  
G. O. Owokoniran ◽  
B. W. Adu ◽  
K. D. Ileke
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Physicochemical Parameters ◽  
Sample Collection ◽  
Southwestern Nigeria ◽  
Generic Level ◽  
Mean Values ◽  
Sediment Samples ◽  
Pollution Levels ◽  
Abundance And Diversity

This study investigated the relationship between the levels of fungicide pollution and the abundance and diversity of macroinvertebrate fauna in three river systems: Aponmu, Oruwo, and Owena in south-western Nigeria, which are in close proximity to cocoa plantations. For each river, three sites were selected for the collection of water and sediment samples from April to July, 2018. Prior to sample collection, the physicochemical parameters (electrical conductivity, total dissolved solutes, pH, temperature, and dissolved oxygen) were determined. Also, aquatic macroinvertebrates were collected, and were identified to generic level, where possible. The levels of copper and sulphate in the samples were determined following standard procedures. The range of mean values for the physicochemical parameters were: 0.07-0.20 mS/cm, 60.00 – 154.00 ppm, 24.60 – 28.13 °C, 6.97 – 7.43, and 0.87 – 2.87 mg/L for electrical conductivity, total dissolved solutes, temperature, pH, and dissolved oxygen respectively. The range of mean values for copper and sulphate in sediment samples were 30.58 – 56.63 mg/Kg and 787.12 – 978.33 mg/Kg respectively while those for the water samples were 2.86 – 6.93 mg/L and 476.6 – 685.58 mg/L respectively. A total of nineteen (19) macroinvertebrate genera comprising Insecta (14), Gastropoda (3), Crustacea (1), and Bivalvia (1) were recorded. Taxa richness and species diversity were higher in river Owena in comparison to rivers Aponmu and Oruwo. The high abundance of the taxa: Potamididae, Gerridae, Notonectidae, Libellulidae, and Platycnemididae in the sampled rivers notwithstanding the pollution levels is an indication that these taxa are capable of thriving in polluted aquatic systems. Keywords: Aquatic pollution; Copper-based fungicides; Black pod disease; Macroinvertebrates; Diversityindices

scholarly journals Multiple Linear Regression (MLR) Model: A Tool for Water Quality Interpretation

2020 ◽  
Vol 12 (1) ◽  
pp. 123-134
Author(s):  
Ogbozige F. J ◽  
Toko M. A ◽  
Arawo C.C
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Physicochemical Parameters ◽  
Tap Water ◽  
Chloride Ion ◽  
Total Hardness ◽  
Uncoated Steel ◽  
Borehole Water ◽  
Black Plastic

The lack of standard water analysis equipment as well as inadequate trained personnel especially in the developing countries has discouraged many researchers in such countries to execute water quality researches. Hence, this paper presents developed mathematical relationship among some physicochemical parameters in order to aid the determination of the concentrations of certain parameters with the use of minimal equipment. This was achieved by weekly analyzing 7 physicochemical parameters of two sources of potable water (tap water and borehole water) stored in different containers for a period of 6 weeks using standard methods. The storage containers used were black plastic tank, blue plastic tank, green plastic tank, coated steel metal tank, uncoated steel metal tank and clay pot. The parameters examined were turbidity, electrical conductivity (EC), pH, alkalinity, chloride ion (Cl-), dissolved oxygen (DO) and total hardness. Results showed that the relationship between electrical conductivity (EC), alkalinity (Alk), total hardness (TH) and chloride ion (Cl-) is given as; EC = -224.8066493 + 6.244028022(Alk) + 0.28204735(TH) + 0.000518108(Cl-). A programing language was written on the models using Visual Basic.Net (VB.Net) version 2018. Keywords: Water, Physicochemical, Parameters, Function, Equation.

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