Hydrogeological potential of major fractures in Eritrea

Drury, S. A.; Peart, R.J.; Deller, M.E. Andrews

doi:10.1016/s0899-5362(01)90002-8

Cited by 20 publications

(16 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Integrating aeromagnetic data and Landsat imagery in groundwater exploration is an established practice in some parts of the world [20], [21]. In central Nigeria, integration of different datasets for groundwater exploration is not very common except for studies performed by [22] …”

Section: Methodsmentioning

confidence: 99%

Investigation of Geological Structures of Hydrogeological Importance of 1:100,000 Sheet 185 (Paiko) North-Central Nigeria Using Integrated Geophysical and Remote Sensing Techniques

Ejepu¹,

Olasehinde²,

Aa³

et al. 2017

Preprint

View full text Add to dashboard Cite

Aeromagnetic data coupled with Landsat ETM+ data and SRTM DEM have been processed in order to map regional hydrogeological structures in the basement complex region of Paiko, north-central Nigeria. Lineaments were extracted from derivative maps from aeromagnetic, Landsat ETM+ and SRTM DEM datasets. Ground geophysical investigation utilizing Radial Vertical Electrical Sounding (RVES) was established in nine transects comprising of four sounding stations which are oriented in three azimuths. Source Parameter Imaging (SPI) was employed to map the average depths structures from aeromagnetic dataset. Selected thematic layers which included lineaments density, lithologic, slope, drainage density and geomorphologic maps were integrated and modelled using ArcGIS to generate groundwater potential map of the area. Groundwater zones were classified into four categories: very good, good, moderate and poor according to their potential to yield sustainable water to drilled wells. Results from RVES survey reveal a close correlation to lineaments delineated from surface structural mapping and remotely sensed datasets. Hydrogeological significance of these orientations suggest that aeromagnetic data can be used to map relatively deep-seated fractures which are likely to be open groundwater conduits while remotely sensed lineaments and orientations delineated from the RVES survey may indicate areas of recharge. Regions with high lineament density have relatively better groundwater potential. This is attributable to areas having deep weathering profiles associated with intrusive bodies that have resulted in intense fracturing in the area. Drill depths in this area should target a minimum of 80 m to ensure sufficient and sustainable supplies to drilled wells. The outcome of this study should act as information framework that would guide the siting of productive water wells and while providing needed information for relevant agencies in need of data for the development of groundwater resources.

show abstract

Section: Methodsmentioning

confidence: 99%

Investigation of Geological Structures of Hydrogeological Importance of 1:100,000 Sheet 185 (Paiko) North-Central Nigeria Using Integrated Geophysical and Remote Sensing Techniques

Ejepu¹,

Olasehinde²,

Aa³

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…Furthermore remote sensing techniques have been efficiently utilized to investigate hydrogeological conditions (Mabee et al, 1994;Drury et al, 2001), groundwater monitoring (Rodell & Famiglietti, 2002), groundwater and resource evaluation (Koch & Matter, 1997;Bressan & Anjos, 2003). Schowengerdt (1997) has noted that the Visible and Near Infra-Red (VNIR) region of the spectrum has the smallest spectral error.…”

Section: Generation Of Fuzzy Structure Evidence Layermentioning

confidence: 99%

Prospectivity Modeling of Karstic Groundwater Using a Sequential Exploration Approach in Tepal Area, Iran

Sharifi

Arab-Amiri

Kamkar‐Rouhani

et al. 2017

Archives of Mining Sciences

View full text Add to dashboard Cite

The purpose of this study is water prospectivity modeling (WPM) for recognizing karstic water-bearing zones by using analyses of geo-exploration data in Kal-Qorno valley, located in Tepal area, north of Iran. For this, a sequential exploration method applied on geo-evidential data to delineate target areas for further exploration. In this regard, two major exploration phases including regional and local scales were performed. In the first phase, indicator geological features, structures and lithological units, were used to model groundwater prospectivity as a regional scale. In this phase, for karstic WPM, fuzzy lithological and structural evidence layers were generated and combined using fuzzy operators. After generating target areas using WPM, in the second phase geophysical surveys including gravimetry and geoelectrical resistivity were carried out on the recognized high potential zones as a local scale exploration. Finally the results of geophysical analyses in the second phase were used to select suitable drilling locations to access and extract karstic groundwater in the study area. wodonośnych pochodzenia krasowego zamodelowano warstwy struktur skalnych dowodzące występowa-nia wód w oparciu o podejście logiki rozmytej. Po wytyczeniu obszarów docelowych, w drugim etapie badań przeprowadzono szczegółowe analizy geofizyczne z wykorzystanie grawimetrii i badań oporności geo-elektrycznej w strefach potencjalnego występowania wód, w aspekcie badania w skali lokalnej. W końcowym etapie, wyniki analiz geofizycznych otrzymane w drugim etapie procedury wykorzystane zostały do wyznaczenia miejsc wykonania odwiertów do uzyskania wód gruntowych pochodzenia krasowego w badanym terenie.Słowa kluczowe: modelowanie występowania wód, badanie sekwencyjne, logika rozmyta, wody gruntowe pochodzenia krasowego

show abstract

“…High fluoride groundwaters are common in the rift valley regions of Kenya and Tanzania (e.g. Ashley & Burley, 1995;Reimann, 2003 (Drury et al, 2001). However locating deep horizontal fracture zones (such as the boundary between lava flows) can be difficult using geophysics, and boreholes may have to be drilled relying solely on experience from previous drilling in the area.…”

Section: Figurementioning

confidence: 99%

African hydrogeology and rural water supply

MacDonald¹,

Davies²,

Calow³

2008

IAH - Selected Papers on Hydrogeology

View full text Add to dashboard Cite

The widespread development of groundwater is the only affordable and sustainable way of improving access to clean water and meeting the Millennium Development Goals for water supply by 2015. Current approaches to rural water supply, in particular demand driven approaches and decentralisation of service delivery have many benefits to the overall efficacy and sustainability of water supplies, however, problems arise when projects do not take into

show abstract

Hydrogeological potential of major fractures in Eritrea

Cited by 20 publications

References 10 publications

Investigation of Geological Structures of Hydrogeological Importance of 1:100,000 Sheet 185 (Paiko) North-Central Nigeria Using Integrated Geophysical and Remote Sensing Techniques

Investigation of Geological Structures of Hydrogeological Importance of 1:100,000 Sheet 185 (Paiko) North-Central Nigeria Using Integrated Geophysical and Remote Sensing Techniques

Prospectivity Modeling of Karstic Groundwater Using a Sequential Exploration Approach in Tepal Area, Iran

African hydrogeology and rural water supply

Contact Info

Product

Resources

About