scholarly journals Spatial and seasonal assessment of physico-chemical characteristics of soil in Wadi El-Rayan lakes using GIS technique

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Asmaa Nasser Mohamed Eid ◽  
C. O. Olatubara ◽  
T. A. Ewemoje ◽  
Mohamed Talaat El-Hennawy ◽  
Haitham Farouk
Keyword(s):  
Spatial Distribution ◽  
Ordinary Kriging ◽  
Temporal Distribution ◽  
Soil Samples ◽  
Soil Parameters ◽  
Chemical Parameters ◽  
Distribution Maps ◽  
Physico Chemical ◽  
Gis Technique ◽  
High Concentrations

AbstractWadi El-Rayan wetland is an inland Egyptian Ramsar site of international importance, due to its rich biodiversity. The wetland constitutes two man-made lakes. The lakes size, particularly the Lower Lake, is in continuous reduction, and the vegetation productivity pattern is changing as result of deteriorating water and soil quality, domestic and industrial activities. This research was carried out to map the spatial and seasonal distribution of certain physico-chemical parameters of geo-referenced soil samples covering the two lakes parts using ordinary kriging GIS technique. The study utilized ArcGIS ver.10.7 software, and 76 soil samples collected from representative sites; 38 samples during winter and 38 samples during summer seasons. Soil data were analyzed statistically and geo-statistically based on best fitted semivariogram model. The results indicated high concentrations of some soil physical and chemical parameters, especially in summer and in the Lower Lake of Wadi El-Rayan. The summary statistics for soil parameters had shown that the median of some soil parameters is higher than the mean which indicated the presence of abnormal data. This finding has been approved through the spatial distribution mapping which clearly showed the differences in spatial and temporal distribution between the upper and lower lakes of Wadi El-Rayan. The study concluded that the generated spatial distribution maps using ordinary kriging method can be used as an effective tool in Wadi El-Rayan wetlands’ soil management.

scholarly journals Assessment of Spatio-temporal levels of pollution parameters due to dumpsite leachate in Lagos, Southwest Nigeria

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Geoffrey E Nwosu ◽  
Adedayo A Badejo ◽  
Adebola A Adekunle ◽  
Olayemi J Adeosun
Keyword(s):  
Information System ◽  
Spatial Distribution ◽  
Geographic Information System ◽  
Chemical Parameters ◽  
Distribution Maps ◽  
Physico Chemical ◽  
Laboratory Results ◽  
Southwest Nigeria ◽  
Spatio Temporal ◽  
Groundwater Wells

 This study is on the assessment of  spatio-temporal levels of physico-chemical parameters of groundwater in domesticwells located at points around some selected dumpsite due to dumpsite leachate on groundwater pollution. Three dumpsites: Orile (O); Solous 3 (S3) and Solous 1 (S1). Leachate from the respective dumpsites and water from the 10 select wells within 1 km radius of each dumpsites were sampled and analyzed in the laborator. .Spatial distribution maps of the parameters were generated using Geographic Information System and ArchMap 10.5. Laboratory results  revealed that water in domestic wells were deteriorated due to the percolation of  leachate. Spatial analysis revealed that pollution of groundwater was higher within a distance of 345 m from the dumpsites and decreases as the distance increases from the dumpsites. The leachate concentration of  Cl, SO4, COD and BOD5  from O; TDS, and EC  from S3; Cr and Pb  from S1 dumpsites respectively were above WHO leachate disposal values. The study showed that O impacted more on  groundwater quality  than S3 and S1. It is recommended that water from these wells should not used without treatment.Keywords: Leachate, dumpsite, groundwater, wells, pollution.

scholarly journals Assessment of diversity and physico-chemical parameters of cyanobacteria, diatoms and other algal species in the paddy fields of Belagavi district, Karnataka

2020 ◽  
Vol 7 (3) ◽  
pp. 378-382
Author(s):  
Santoshkumar Jayagoudar ◽  
Pradeep Bhat ◽  
Ankita Magdum ◽  
Duradundi Sakreppagol ◽  
Laxmi Murgod ◽  
...  
Keyword(s):  
Algal Species ◽  
Soil Samples ◽  
Chemical Parameters ◽  
Range Estimation ◽  
The North ◽  
Physico Chemical ◽  
Water And Soil Samples ◽  
Study Sites ◽  
Good Range

Algae are the diverse group of organisms in the soil and aquatic environment. The role of them in soil fertility enhancement has been extensively studied worldwide. Belagavi is a tropical agricultural belt in the North Karnataka region with highly fertile soil. Water and soil samples were collected randomly from the paddy field of 15–20 well-distributed spots in 4 selected locations viz Kusumali, Jamboti, Kinaye and Piranwadi. The identification revealed the presence of 94 species and 71 genera in the investigated sites. Among all, 62 species belonged to Bacillariophyceae, 14 species to Chlorophyceae, 10 species to Cyanophyceae, 3 to Xanthophyceae, followed by Trebouxiophyceae and Zygnematophyceae (2 species each) and one species of Ulvophyceae. The maximum number of 62 species was recorded from Kusamali, followed by 49 species in Kinaye, 44 in Jamboti and 35 in Piranwadi. The month of February had the highest number of species (61), decreased to 45 in March, 42 in April and 37 in May. Among the physicochemical parameters analysed for the soil samples, it was found that the pH of the soil is slightly acidic in all the study sites ranged between 5.03–5.85. Further, the electrical conductivity (EC) varied from 0.27–0.345 dS/m, found to be in a good range. Estimation of available micro and macronutrients of soil were measured, and it was found to be at low to moderate levels. The present study indicates the extensive distribution of different classes of algae in the rice fields of four study locations in Belagavi.

Spatial distribution of physico-chemical parameters for groundwater quality evaluation in a part of Satluj River Basin, India

2019 ◽  
Vol 19 (5) ◽  
pp. 1480-1490 ◽  
Author(s):  
Akshay Kumar Chaudhry ◽  
Kamal Kumar ◽  
Mohammad Afaq Alam
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Spatial Dependence ◽  
Groundwater Resources ◽  
Quality Parameters ◽  
Northern Region ◽  
Total Hardness ◽  
Data Set ◽  
Distribution Maps ◽  
Physico Chemical

Abstract The rising population, contamination and mismanagement of groundwater worldwide require sustainable management techniques and strategies to prevent misuse of groundwater resources especially in the semi-arid regions of the world. The aim of the present study is to assess the distribution of contaminants in groundwater at a spatial level by using a geostatistical method, namely ordinary kriging. For this, a physico-chemical parameter data set at 14 sampling locations for a period over 25 years was assessed. Three semi-variogram models, namely exponential, Gaussian and spherical, fitted well for the data set and were cross-validated using predictive statistics. Based on nugget/sill ratio, which characterizes the overall spatial dependence of water quality parameters, it was observed that, apart from nitrate, all the other parameters showed moderate to weak spatial dependence (i.e. total hardness), indicating significant influence of urbanization, fertilization and industrialization. Spatial distribution maps of all the parameters were generated. Concentration of most of the parameters reported high values in the northern region, while silicon dioxide and potassium recorded high values in the southern and central regions of the study area respectively. The study highlighted the depleting groundwater resources in various regions of the study area, indicating that the groundwater quality is in a declining state.

Colloidal speciation of heavy metals in runoff and interstitial waters of a retention/infiltration pond

2006 ◽  
Vol 54 (6-7) ◽  
pp. 307-314 ◽  
Author(s):  
B. Béchet ◽  
B. Durin ◽  
M. Legret ◽  
P. Le Cloirec
Keyword(s):  
Heavy Metals ◽  
Strong Impact ◽  
Chemical Parameters ◽  
Runoff Water ◽  
Lead And Cadmium ◽  
Physico Chemical ◽  
High Concentrations ◽  
Chemical Conditions ◽  
The Impact ◽  
Interstitial Waters

The thickness of non-saturated zone and physico-chemical conditions are important parameters to assess the impact of infiltration ponds on water resources with respect to heavy metals transfer. As changes in physico-chemical parameters of solutions have a strong impact on the mobility of colloidal phases in sediments and soils, the colloidal facilitated transfer of heavy metals has to be investigated. Therefore, this study focuses on the characterization of runoff, surface and interstitial waters in a retention/infiltration pond collecting runoff waters of a bridge near Nantes. Physico-chemical parameters and chemical analyses were performed on the waters during about one year. The separation of dissolved and colloidal fractions was carried out by filtration and ultrafiltration for one sample of surface and interstitial waters. Until now, the runoff waters were only filtered at 0.45 μm. The comparison of physico-chemical data shows that the minor variations of runoff water parameters are mitigated in basin and in soils but strong variations impact the composition of interstitial waters. High concentrations of zinc, copper and still of lead are measured in runoff. Lead and cadmium seem to be associated to colloidal and particulate fractions while zinc, copper, nickel and chromium are distributed in all fractions.

scholarly journals Accuracy, Conservatism and Parsimony of Three Vapour Intrusion Models Used in Sweden

2018 ◽  
Vol 12 (10) ◽  
pp. 128
Author(s):  
Jeroen Provoost ◽  
Stephanie Nouwen ◽  
Jan Bronders
Keyword(s):  
Indoor Air ◽  
False Negative ◽  
Point Estimate ◽  
Soil Parameters ◽  
Chemical Parameters ◽  
Air Concentration ◽  
Deterministic Analysis ◽  
Physico Chemical ◽  
Parsimonious Model ◽  
Parameter Values

This study presents an evaluation of three screening-level models, namely the Dilution Factor (DF) model from 1996, the update version from 2005, as well as the Johnson and Ettinger model (JEM) from 1997, that are applied within the frameworks for contaminated land management (CLM) in Sweden. This evaluation applies, besides a deterministic approach (point estimate), a probabilistic assessment plus sensitivity analysis. The latter approach allows the models to be ranked according to conservatism, accuracy and parsimony by contrasting predicted and observed soil and indoor air concentrations for two contaminants (benzene and ethylbenzene), as to determine their suitability for application within CLM. The results and conclusions from this study suggest that the most accurately model for predicting the soil and indoor concentration is the JEM followed by the DF 2005 and 1996. Predictions of the soil air concentration are primarily driven by variation in physico-chemical parameters. The variation in indoor air concentration by physico-chemical and/or soil parameters for the DF models, while for the JEM soil parameters dominate. The deterministic analysis showed that default parameter values could be revised as to increase the conservatism, and be closer to the probabilistic 95-percentile predicted indoor air concentration. The DF 1996 model includes a limited number of parameters, and this analysis shows that a model with more parameters is more accurate, and less conservative. The DF 2005 seems to be the most parsimonious model as it is accurate, sufficiently conservative, and has 14 parameters, whereas the DF 1996 with 9 parameters is the most conservative and the JEM with 27 parameters the most accurate with an increased probability to produce false negative predictions. For the latter some of the dominant parameters cannot easily be measured on site.

scholarly journals Spatial distribution of salinity, mud thickness and slope along mangrove ecosystem of the coast of Kupang District, East Nusa Tenggara, Indonesia

2019 ◽  
Vol 20 (6) ◽  
Author(s):  
JERIELS MATATULA ◽  
ERNY POEDJIRAHAJOE ◽  
SATYAWAN PUDYATMOKO ◽  
RONGGO SADONO
Keyword(s):  
Spatial Distribution ◽  
Sea Water ◽  
Mangrove Ecosystem ◽  
Scientific Data ◽  
Systematic Sampling ◽  
Mangrove Forests ◽  
Entire Study ◽  
Distribution Maps ◽  
Physico Chemical ◽  
Chemical Conditions

Abstract. Matatula J, Poedjirahajoe E, Pudyatmoko S, Sadono R. 2019. Spatial distribution of salinity, mud thickness and slope along mangrove ecosystem of the coast of Kupang District, East Nusa Tenggara, Indonesia. Biodiversitas 20: 1624-1632. Mangrove ecosystem is suffering from continuous damage in terms of quality as well as quantity. Rapid mangrove conversion triggered by the ever-growing human population and activities have affected them adversely and caused mangrove deterioration in the coastal areas of Kupang District, Indonesia. The decline of quality and quantity of mangrove environment has caused highly alarming effects, such as an increase in abrasion, decrease of marine products, and sea-water intrusion. Although various efforts have been deployed for the rehabilitation of mangrove forests, there are no significant results yet. One of the reasons is such efforts are not based on scientific data on suitability of the physico-chemical conditions of the mangrove habitats. The objectives of this study was to analyse the physico-chemical conditions, such as salinity, mud thickness and slope of five selected mangrove locations, namely Tarus, Mata Air, Tanah Merah, Oebelo and Merdeka in Kupang District by systematic sampling method and to prepare spatial distribution maps for each of these parameters. Salinity conditions showed a wide variation in the study locations, starting from 10 ppm to 38.33 ppm. Mud thickness ranged from 20.11 cm to 84.77 cm in the entire study area. The highest mud thickness of 84.77 cm was found in Tanah Merah, followed by Oebelo with the maximum thickness of 74.66 cm, Mata Air with 56.22 cm, Merdeka with 53.66 cm, and the lowest mud thickness was in Tarus with 53.55 cm. Mangrove locations in Kupang District are dominated with 2-3% slope. The study indicated that the habitat conditions in the coastal area of Kupang District are suitable for the growth of mangroves. This study will also provide the basis to plan future mangrove rehabilitation programs in the study area.

scholarly journals The quality of water of the Mantovo reservoir, Republic of Macedonia

2009 ◽  
Vol 61 (3) ◽  
pp. 501-512 ◽  
Author(s):  
Valentina Slavevska-Stamenkovic ◽  
T. Stafilov ◽  
S. Smiljkov ◽  
M. Paunovic ◽  
S. Hristovski
Keyword(s):  
Organic Pollution ◽  
Nutrient Concentrations ◽  
Chemical Parameters ◽  
Limnodrilus Hoffmeisteri ◽  
Quality Of Water ◽  
Environmental Status ◽  
Physico Chemical ◽  
High Concentrations ◽  
Very High

The aim of the paper is to evaluate the quality of water of the Mantovo Reservoir (Southeast Macedonia)based on physico-chemical parameters and the macrozoobenthos. Monthly sampling was performed during 2003 and 2004. Temperature and DO depth profile data indicate that the Mantovo Reservoir is a dimictic lake. Based on mean nutrient concentrations, the Mantovo Reservoir can be considered as being phosphorus-deficient. During the summer stratification, very high concentrations of Mn (2,819 ?g/l)and Cu (147.6?g/l)were detected in the lower profundal. Limnodrilus hoffmeisteri was the dominant species, which indicates the presence of organic pollution. Dominance of Chaoborus crystallinus and decline in abundance of L. hoffmeisteri in the lower profundal indicate a deterioration of environmental status in the deepest part of the lake.

scholarly journals Hydrochemical Characterisation of Groundwater Quality: Merdja Plain (Tebessa Town, Algeria)

2020 ◽  
Vol 6 (2) ◽  
pp. 318-325 ◽  
Author(s):  
Baazi Houria ◽  
Kalla Mahdi ◽  
Tebbi Fatima Zohra
Keyword(s):  
Groundwater Quality ◽  
Principal Component ◽  
Anthropogenic Factors ◽  
Agricultural Activity ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
High Concentrations ◽  
Geological Formations

The objective of this work is to evaluate the physico-chemical quality of the groundwater of the Merdja plain and to determine the sources of mineralization. This quality is influenced by several environmental and anthropogenic factors such as geological context, climate, precipitation and interaction between groundwater and aquifers and human activities.  A Principal Component Analysis (PCA) on samples taken from several wells spread over the entire Tebessa plain (Merdja) allowed us to detect two axes that explain 73.4% of the information. The first axis describes the variables related to mineralisation and the second one describes those related to agricultural activity. Multidimensional Positioning (MDS) confirmed the interaction of physico-chemical parameters between them and their influence on groundwater quality by highlighting three groups of wells according to their physico-chemical characteristics, particularly those containing high concentrations of nitrates. This contamination is mainly the result of spreading the fertilisers and wastes that are dumped into the plain without treatment. Salinization is the result of long-term interactions between groundwater and geological formations.

scholarly journals Spatial Distribution of Weed Seed Banks in the Agricultural Field and Anthropized Cerrado

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Klayton Antonio do Lago Lopes ◽  
Marcelo De Sousa Silva ◽  
Leandro Dos Santos Costa ◽  
Taciella Fernandes Silva ◽  
Tiago Vieira da Costa ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Spatial Variability ◽  
Seed Bank ◽  
Ordinary Kriging ◽  
Management Practices ◽  
Total Density ◽  
Agricultural Field ◽  
Weed Seed ◽  
Eleusine Indica ◽  
Distribution Maps

Characterization of the seeds bank is an essential tool for decision making on weed control and management practices and the study and maintenance of the ecological dynamics of natural areas. In this context, the present study aimed to characterize the spatial variability of the seeds bank in an experimental agricultural field and an anthropized cerrado area, using the ordinary kriging geostatistical technique. Sampling was carried out on 10x10 regular grids in two different environments. Area 01 consisted of an experimental agricultural field of annual crops (soy and corn); area 02 represented the anthropized cerrado. The sample grids consisted of 25 points collected at a depth of 0.00-0.20 m. The soil samples were placed in 6.38 dm3 and 0.05 m² plastic containers. Spatial distribution maps of the species found have been drawn up, grouped in dicotyledonous, monocotyledonous, and total density, in addition, the density of three weeds most found in each area. The weed seed bank present strong spatial variability to 01 and 02, which indicates behavior in spots or in patches for both dicotyledonous and monocotyledonous plants, especially Mollugo verticillata L. and Eleusine indica (L.) Gaertn. in the experimental field, and for Richardia scabra L. and Eleusine indica (L.) Gaertn. in the anthropized cerrado. The ordinary kriging technique made it possible to map the weed seed bank and, therefore, it may work as an efficient tool in controlling weeds in agricultural fields, especially in its pre-emergence phase. Furthermore, it can assist in the recovery of native anthropized vegetation. 

scholarly journals Physico-Chemical Parameters Determining the Variability of Actually and Potentially Available Fractions of Heavy Metals in Fluvial Sediments of the Middle Odra River

2013 ◽  
Vol 39 (2) ◽  
pp. 3-16 ◽  
Author(s):  
Aleksandra Ibragimow ◽  
Barbara Walna ◽  
Marcin Siepak
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Microwave Digestion ◽  
Coarse Grained ◽  
Chemical Parameters ◽  
Sediment Samples ◽  
Physico Chemical ◽  
Odra River ◽  
High Concentrations

Abstract The occurrence of heavy metals (Cd, Cr, Cu, Ni, Pb, Zn) has been determined in the fluvial sediment samples collected along three transects in the Middle Odra River (western Poland) with a width of 360 m. The total concentrations of the metals were obtained after HNO3 microwave digestion and the available fractions of heavy metals were determined by single extraction procedures using two extractants: 0.01M CaCl2 and 0.05M EDTA. The measurement of physico-chemical parameters was also performed. The determination of total and available fractions of heavy metals, except potential available fractions of Cr, revealed high concentrations of studied elements detected in the sediment samples characterized by high content of coarse and very coarse-grained sand fraction and high content of organic matter. It was found that the concentrations of total and available fractions of metals could increase along with the content of organic matter, Eh values and concentrations of H+. Apart from the above, those concentrations become the lowest, the higher the content of medium grain size fractions is. Furthermore, the amounts of CaCl2 and EDTA extractable metals increase in the sediments samples characterized by the lowest total and available concentrations of heavy metals.

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