scholarly journals Spatial Distribution Analysis and Mapping of Groundwater Quality Parameters for the Sylhet City Corporation (SCC) Area Using GIS

Hydrology ◽  
2015 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
Gulam Md Munna
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Quality Parameters ◽  
Distribution Analysis

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.

scholarly journals An Integrated Use of GIS, Geostatistical and Map Overlay Techniques for Spatio-Temporal Variability Analysis of Groundwater Quality and Level in the Punjab Province of Pakistan, South Asia

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3555
Author(s):  
Huzaifa Shahzad ◽  
Hafiz Umar Farid ◽  
Zahid Mahmood Khan ◽  
Muhammad Naveed Anjum ◽  
Ijaz Ahmad ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Groundwater Level ◽  
Management Practices ◽  
Quality Parameters ◽  
Sodium Absorption ◽  
Distribution Analysis ◽  
East Part ◽  
Post Monsoon ◽  
Spatio Temporal ◽  
Lower South

The rapidly changing climatic scenario is demanding periodic evaluation of groundwater quality at the temporal and spatial scale in any region for its effectual management. The statistical, geographic information system (GIS), geostatistical, and map overlay approaches were applied for investigating the spatio-temporal variation in groundwater quality and level data of 242 monitoring wells in Punjab, Pakistan during pre-monsoon and post-monsoon seasons of the years 2015 and 2016. The analysis indicated the higher variation in data for both the seasons (pre-monsoon and post-monsoon) as coefficient of variation (CV) values were found in the range of 84–175% for groundwater quality parameters. Based on the t-test values, the marginal improvement in groundwater electrical conductivity (EC), sodium absorption ratio (SAR) and residual sodium carbonate (RSC) and decrease in groundwater level (GWL) were observed in 2016 as compared to 2015 (p = 0.05). The spatial distribution analysis of groundwater EC, SAR and RSC indicated that the groundwater quality was unfit for irrigation in the lower south-east part of the study area. The groundwater level (GWL) was also higher in that part of the study area during the pre-monsoon and post-monsoon seasons in 2015 and 2016. The overlay analysis also indicated that the groundwater EC, RSC and GWL values were higher in south-east parts of the study area during pre-monsoon and post-monsoon seasons of 2015 and 2016. Hence, there is an instant need to apply groundwater management practices in the rest of the region (especially in the lower south-east part) to overcome the future degradation of groundwater quality.

scholarly journals Sustainability Assessment of the Groundwater Quality in the Western India to Achieve Urban Water Security

2018 ◽  
Author(s):  
Chitresh Saraswat ◽  
Pankaj Kumar ◽  
Prashant Bhalani
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Sustainability Assessment ◽  
Water Security ◽  
Quality Parameters ◽  
Western India ◽  
Water Demands ◽  
Treatment Facilities ◽  
Development Goals ◽  
The City

Achieving water security and availability for all is the main agenda of the UN-Sustainable Development Goals by the year 2030. To achieve the goal of water secure future in rapidly urbanizing cities, the sustainable water supplies are necessary. In the western part of India, the city of Surat is continuously growing and rapidly urbanized, which exerting massive pressure on groundwater water supply to meet increasing water demands. The study adopted the investigative approach, in which a total 33 groundwater samples were collected in and around the city from open, bore and dug wells and hand pumps. The selection of sampling sites was based on the land use signature, areas with a different depth of aquifers and different geological formations. After the hydrogeochemical analysis, the study evaluated the present state of the groundwater quality and determined the spatial distribution of groundwater quality parameters such as hardness, electrical conductivity, Cl −, pH, SO42-, and NO3 −  concentrations. An interpolation technique, known as ordinary kriging, was used to acquire the spatial distribution of parameters of groundwater quality parameters. The result showed that the groundwater quality falls under class I (>25%) and class II (25 to75%) category. The study recommends that the groundwater in the study area is not suitable for potable purposes, especially without any improved onsite water treatment facilities but it is appropriate for the irrigation purposes in City.

scholarly journals Assessment of groundwater quality in Bhavani region

2020 ◽  
Author(s):  
PERUMAL KARTHIKEYAN ◽  
Jabar Abdul Bari ◽  
Vennila G
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Quality Parameters ◽  
Weighted Interpolation ◽  
Distance Method ◽  
Study Region ◽  
Physico Chemical ◽  
Groundwater Samples ◽  
Inverse Distance ◽  
Spatial Distribution Map

This work deals with the spatial distribution of groundwater quality parameters and their interrelationship in Bhavani Taluk, Erode District, Tami Nadu, India. The present study deals with the suitability of groundwater quality for drinking purpose in Bhavani Taluk, Erode District, India and to determine the spatial distribution groundwater quality parameters by using ArcGIS. The groundwater samples of 53 wells from the study region are collected and are tested in the laboratory to determine the physico-chemical parameters and the obtained results determined the suitability of groundwater for drinking purposes by comparing with WHO standards. From the result, groundwater quality zones were identified as Good (423.10 sq.km), Moderate (155.70 sq.km) and Poor zones (63.18 sq.km) by inverse distance method weighted interpolation techniques from the spatial distribution map using ArcGIS. The study indicates that about half of the groundwater is not suitable for drinking due to by the excessive usage of fertilizers and necessary treatment has to be undertaken before drinking water supply.

scholarly journals Sustainability Assessment of the Groundwater Quality in the Western India to Achieve Urban Water Security

2018 ◽  
Author(s):  
Chitresh Saraswat ◽  
Pankaj Kumar ◽  
Rajarshi Dasgupta ◽  
Prashant Bhalani
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Sustainability Assessment ◽  
Water Security ◽  
Quality Parameters ◽  
Western India ◽  
Groundwater Samples ◽  
Indian City ◽  
Dug Wells ◽  
Development Goals

Achieving water security and availability for all is among the principle agenda of the UN-Sustainable Development Goals. To achieve the goal of water security, particularly in rapidly expanding cities, identification of safe and sustainable water resources is an absolute necessity. The paper conducts an exploratory investigation in the hydro geochemical characteristics of groundwater and thereby, assess the suitability of groundwater as an alternative and reliable resource for public water supply in the Indian city of Surat. A total of 33-groundwater samples, selected on the basis of aquifer depth, land use signatures, were collected from open, bore, dug wells and hand pumps. After the hydrogeochemical analysis, the study evaluated the present state of the groundwater quality and determined the spatial distribution of groundwater quality parameters such as hardness, electrical conductivity, Cl −, pH, SO42-, and NO3 − concentrations. An interpolation technique, known as ordinary kriging, was used to acquire the spatial distribution of parameters of groundwater quality parameters. Based on the permeability index, result showed that 80% of the sampled groundwater quality falls under excellent class i.e. category I with PI value ranging from 1-24%, whereas the rest 20% of the samples has fallen under good class i.e. category II with PI value ranging from 25 to 75% on the suitability of water for irrigation. The results of this study outlines the unsustainability of groundwater for direct consumption, especially without any improved onsite water treatment, but it is appropriate for the irrigation purposes.

Spatial Distribution Analysis of Attributes of Rock Joints Using Geomathematical Methods.

1996 ◽  
Vol 112 (13) ◽  
pp. 907-914 ◽  
Author(s):  
Katsuaki KOIKE ◽  
Yoshifumi NOGUCHI ◽  
Hiroshi IWASAKI ◽  
Katsuhiko KANEKO
Keyword(s):  
Spatial Distribution ◽  
Rock Joints ◽  
Distribution Analysis

Niche Sharing in Intertidal Mollusks and Decapods in Rocky Shore of Easter Island

2019 ◽  
Vol 53 (5) ◽  
pp. 417-422
Author(s):  
P. De los Ríos ◽  
E. Ibáñez Arancibia
Keyword(s):  
Spatial Distribution ◽  
Negative Binomial Distribution ◽  
Binomial Distribution ◽  
Rocky Shore ◽  
Negative Binomial ◽  
Null Model ◽  
Easter Island ◽  
Published Data ◽  
Distribution Analysis ◽  
Field Works

Abstract The coastal marine ecosystems in Easter Island have been poorly studied, and the main studies were isolated species records based on scientific expeditions. The aim of the present study is to apply a spatial distribution analysis and niche sharing null model in published data on intertidal marine gastropods and decapods in rocky shore in Easter Island based in field works in 2010, and published information from CIMAR cruiser in 2004. The field data revealed the presence of decapods Planes minutus (Linnaeus, 1758) and Leptograpsus variegatus (Fabricius, 1793), whereas it was observed the gastropods Nodilittorina pyramidalis pascua Rosewater, 1970 and Nerita morio (G. B. Sowerby I., 1833). The available information revealed the presence of more species in data collected in 2004 in comparison to data collected in 2010, with one species markedly dominant in comparison to the other species. The spatial distribution of species reported in field works revealed that P. minutus and N. morio have aggregated pattern and negative binomial distribution, L. variegatus had uniform pattern with binomial distribution, and finally N. pyramidalis pascua, in spite of aggregated distribution pattern, had not negative binomial distribution. Finally, the results of null model revealed that the species reported did not share ecological niche due to competition absence. The results would agree with other similar information about littoral and sub-littoral fauna for Easter Island.

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