Delineating groundwater potential zones in a hard-rock terrain using geospatial tool

Singh, Pratika; Thakur, Jay Krishana; Kumar, Suveen

doi:10.1080/02626667.2012.745644

Cited by 94 publications

(30 citation statements)

References 24 publications

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“…It is thus important to assess the hydrochemical properties and record information about geological settings of the sample and the descriptive information (Howarth 2013). Statistical analysis of wide range of dataset helps to determine the spatial variation in groundwater quality relationship among various parameters (Thakur et al 2012;Singh et al 2013c). Similarly, saturation index is the key to evaluation of various stages of hydrochemical evolution of the particular groundwater system.…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical evaluation of groundwater of Bhaktapur Municipality, Nepal

Thakur¹,

Diwakar

Singh

2015

Environ Earth Sci

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The present study aims to evaluate groundwater hydrogeochemistry of Bhaktapur Municipality, Nepal with respect to water types, chemical elements and their statistical variability. Samples were collected in pre-monsoon (April-June), monsoon (July-August) and post-monsoon (October-November) seasons in 2007. Laboratory analysis of samples revealed inter-seasonal variability, primarily attributed to hydrogeochemical processes. All or most of the samples exceeded the World Health Organization (WHO) guideline value (GLV) for iron, conductivity and turbidity, while none of the samples exceeded WHO GLV for hardness and arsenic with minor fraction exceeding GLV for chloride content. Higher ammonia content in well water and highest phosphate concentration occurred for stone spout in pre-monsoon season. Principle component analysis highlighted three principle components while the dendrogram divided the sampling sites into four and two clusters, respectively, for well water and stone spout water sampling sites. Saturation index computed through WATEQ4F model revealed that ferrihydrite, siderite, strengite and vivianite minerals were in under-saturated state, while goethite was in supersaturated condition for each type of samples (well water and stone spout water) in both pre-and post-monsoon seasons depicting their tendency to precipitate. High degree of supersaturation in goethite mineral indicated response to temperature gradient of the reactions, while under-saturation for other minerals indicated the effect of dilution.

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Section: Introductionmentioning

confidence: 99%

Hydrogeochemical evaluation of groundwater of Bhaktapur Municipality, Nepal

Thakur¹,

Diwakar

Singh

2015

Environ Earth Sci

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“…Satellitebased remote sensing data are capable of revealing structural features including faults, fractures and different landforms. Singh et al (2013), Ndatuwong and Yadav (2014) and Badamasi et al (2016) emphasized the usefulness of remote sensing as a rapid assessment tool in groundwater exploration. The integrated approach is particularly fascinating as it is applicable even in inaccessible areas.…”

Section: Introductionmentioning

confidence: 99%

Use of remote sensing and GIS techniques for groundwater exploration in the basement complex terrain of Ado-Ekiti, SW Nigeria

Oyedele

2019

Appl Water Sci

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Integrated investigations involving remote sensing and GIS have been conducted with the objective of achieving optimal results in sustainable groundwater development in Ado-Ekiti, southwestern Nigeria. The hard rock terrain in the region presents challenges in groundwater exploration. Landsat imageries were used for landuse/landcover mapping and lineament analysis for groundwater prospecting. Shuttle Radar Topographic Mission Digital Elevation Model was used for drainage network extraction, slope and geomorphological analysis. Thematic maps were generated, analysed in terms of hydrogeological importance and reclassified for integration using appropriate software. The groundwater potential maps generated were validated against the existing groundwater yield data. The light vegetation and bare soil area cover was 110.9 km 2 , with the rock outcrops covering a total area of 14.9 km 2. Hydrogeomorphic units delineated included hills, pediments, pediplains, alluvium and valley fills. The lineaments showed predominantly NNW-SSE, ENE-WSW and NNE-SSW orientations and subsidiary NW-SE and WE trends. Application of geospatial techniques has been recognized. The methodology provides improvements in the understanding of the hydrogeological characteristics of the basement terrain. These will aid planning and management of groundwater resources in the crystalline basement terrain.

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“…It is more than 2000 m thick on its western margin and decreases in thickness eastward and occupies *5, 00,000 km 2 area spread over parts of Madhya Pradesh, Maharashtra, Gujarat, Andhra Pradesh and Karnataka (Singh et al 2011(Singh et al , 2013a. The basaltic lava flows vary in color from dark gray to purple and pink.…”

Section: Geology and Geomorphology Of The Study Areamentioning

confidence: 99%

Appraisal of urban lake water quality through numerical index, multivariate statistics and earth observation data sets

Singh

Gautam

2015

Int. J. Environ. Sci. Technol.

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The earth observation data sets were employed to study the land use/land cover change in study area from year 2000-2010. Vegetation, built-up area and agriculture classes had shown maximum changes. The lake water samples were analyzed, and further, Water Quality Index (WQI) was computed to categorize the lake water. The average value of WQI is 64.52, 52.23 and 42.45 in premonsoon, monsoon and post-monsoon seasons, respectively. Generally, pre-monsoon samples have higher number of polluted samples. Moreover, we applied the multivariate statistical techniques for handling large and complex data sets in order to get better information about the lake water quality. Factor analysis and principal component analysis are applied to understand the latent structure of the data sets, and we have identified a total of four factors in pre-monsoon, three factors in monsoon and three factors in post-monsoon season, which are responsible for the whole data structure. These factors have explained that 90.908, 89.078 and 85.456 % of the cumulative percentage variance of the pre-monsoon, monsoon and post-monsoon data sets. Overall analysis reveals that the agricultural runoff, waste disposal, leaching and irrigation with wastewater, land transformation in the surrounding areas are the main causes of lake water pollution followed by some degree of pollution from geogenic sources such as rock weathering. Hence, there is an urgent need of proper attention and management of resources.

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Delineating groundwater potential zones in a hard-rock terrain using geospatial tool

Cited by 94 publications

References 24 publications

Hydrogeochemical evaluation of groundwater of Bhaktapur Municipality, Nepal

Hydrogeochemical evaluation of groundwater of Bhaktapur Municipality, Nepal

Use of remote sensing and GIS techniques for groundwater exploration in the basement complex terrain of Ado-Ekiti, SW Nigeria

Appraisal of urban lake water quality through numerical index, multivariate statistics and earth observation data sets

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