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Mapping of groundwater potential zones across Ghana using remote sensing, geographic information systems, and spatial modeling

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Title Mapping of groundwater potential zones across Ghana using remote sensing, geographic information systems, and spatial modeling
 
Creator Gumma, Murali Krishna
 
Contributor Pavelic, Paul
 
Subject groundwater potential zones
gis and remote sensing
spatial modeling
borehole data
 
Description Groundwater development across much of
sub-Saharan Africa is constrained by a lack of knowledge
on the suitability of aquifers for borehole construction.
The main objective of this study was to map
groundwater potential at the country-scale for Ghana
to identify locations for developing new supplies that
could be used for a range of purposes. Groundwater
potential zones were delineated using remote sensing
and geographical information system (GIS) techniques
drawing from a database that includes climate, geology,
and satellite data. Subjective scores and weights
were assigned to each of seven key spatial data layers
and integrated to identify groundwater potential
according to five categories ranging from very good
to very poor derived from the total percentage score.
From this analysis, areas of very good groundwater
potential are estimated to cover 689,680 ha (2.9 % of
the country), good potential 5,158,955 ha (21.6 %),
moderate potential 10,898,140 ha (45.6 %), and poor/
very poor potential 7,167,713 ha (30 %). The results
were independently tested against borehole yield data (2,650 measurements) which conformed to the anticipated
trend between groundwater potential and borehole
yield. The satisfactory delineation of groundwater
potential zones through spatial modeling suggests that
groundwater development should first focus on areas
of the highest potential. This study demonstrates the
importance of remote sensing and GIS techniques in
mapping groundwater potential at the country-scale
and suggests that similar methods could be applied
across other African countries and regions.
 
Date 2013-04-30
2017-01-05T19:41:15Z
2017-01-05T19:41:15Z
 
Type Journal Article
 
Identifier https://mel.cgiar.org/reporting/download/hash/Iz1nEW6r
Murali Krishna Gumma, Paul Pavelic. (30/4/2013). Mapping of groundwater potential zones across Ghana using remote sensing, geographic information systems, and spatial modeling. Environmental Monitoring and Assessment, 185(4), pp. 3561-3579.
https://hdl.handle.net/20.500.11766/5230
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Springer Verlag (Germany)
 
Source Environmental Monitoring and Assessment;185,(2013) Pagination 3561,3579