Hard-rock aquifers in tropical regions: using science to inform development and management policy

Foster, Stephen

doi:10.1007/s10040-011-0828-9

Cited by 47 publications

(22 citation statements)

References 9 publications

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“…(Davis & De Wiest, 1996;Issar & Gilad, 1982;LeGrand, 1954;Summers, 1972). Calcaterra, Ietto, and Dattola (1993) Chilton & Foster, 1995;Foster, 2012;Maréchal et al, 2004;Taylor & Howard, 2000) have reported values of hydraulic transmissivity lower than 6 × 10 −4 m 2 s −1…”

Section: Palaeozoic Crystalline Hydrogeological Complexesmentioning

confidence: 99%

Hydrogeology of continental southern Italy

et al. 2018

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This paper summarizes the results of a study focused on the hydrogeological characterization and recognition of groundwater resources in continental southern Italy, developed under the European INTERREG IIC Programme. The study reconstructed up-to-date scientific knowledge regarding aquifers, groundwater circulation schemes and groundwater resources exploitation in the administrative regions of southern Italy included in the Objective I (Molise, Campania, Basilicata, Puglia and Calabria). In this paper, the methodological approaches applied to synthesize and homogenize bibliographic data collected from the hydrogeological literature and to set a regional hydrogeological mapping are described. Results presented are three hydrogeological maps, 1:300,000 scale, showing hydrogeological units and groundwater flow schemes that are relevant in the regional hydrogeological context, and a brief description of principal types of aquifer and groundwater resources of continental southern Italy. ARTICLE HISTORY

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Section: Palaeozoic Crystalline Hydrogeological Complexesmentioning

confidence: 99%

Hydrogeology of continental southern Italy

et al. 2018

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“…Recognition of this fissured layer as part of the weathering profile [16] and of its role in the basement aquifer drainage constitute a significant and recent advance for water resource management of basement rocks aquifers [5].…”

Section: The Weathering Profile Of Granitic Rocks and Its Relationshimentioning

confidence: 99%

“…Moreover, Ouagadougou is situated on basement rocks where aquifers are fully included in the few tens of meter thick weathering profile [3] [4] [5]. Therefore, the available groundwater resource is limited when compared to sedimentary aquifers [6] [7].…”

Section: Introductionmentioning

confidence: 99%

Groundwater Level Changes since 1978 in an African City on Basement Rocks: The Case of the CIEH Borehole in Ouagadougou (Burkina Faso)

Mouhouyouddine¹,

Yaméogo²,

Genthon³

et al. 2017

JWARP

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The CIEH piezometer, located in the center of Ouagadougou city presents a water level record spanning the West African Drought which peaked during the 80s and 90s. Its water level is investigated as a potential proxy for groundwater water resources in West African basement rock aquifers submitted to climate changes. 23 boreholes and wells in various land uses and within a 2 km radius around the CIEH piezometer were monitored during the 2013-2014 hydrologic year. The minimum water level occurred in May, at the end of the dry season, while the maximum took place in October, one month after the end of the rainy season. The mean water level amplitude is 3 m, the minimum amplitude being reached at the CIEH piezometer (0.76 m). Moreover, the CIEH piezometer is located in a 2 m amplitude water table depression either in May or in October. Simplified 2d modeling using a general basement aquifer structure shows that (i) the water level in the piezometer is under ongoing influence of the spillway raise of the nearby dam#3 lake in 2002, (ii) the whole 1978-2004 period cannot be modelled with constant parameters. A 3% decrease of water uptake is adopted after 1985, presumably resulting from land use changes in the Ouagadougou city. The water table at the CIEH piezometer is presently at its 1978 level, which can considered as a pre-drought value. However this includes a 1.5 m contribution of the two abovementioned anthropic effects Further quantitative interpretations of the CIEH piezometer record will require additional geophysical and hydrological investigations.

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“…The fissures have been explained by several processes, such as lithostatic decompression, tectonic activity, cooling stress, and weathering processes. These two layers make up a composite aquifer followed in depth by the fresh basement, which is only locally permeable where tectonic fractures are present [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…This implies that the bedrock transmissivity can vary over many orders of magnitude [3,7,[9][10][11][12][13]. Therefore, well yields are highly variable, and a high incidence of well failure occurs.…”

Section: Introductionmentioning

confidence: 99%

A Multi-Scale Approach in Hydraulic Characterization of a Metamorphic Aquifer: What Can Be Inferred about the Groundwater Abstraction Possibilities

Baiocchi

Dragoni

Lotti

et al. 2015

Water

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Hard-rock aquifers, which constitute a water supply source in many countries, are highly heterogeneous and defining a realistic model of an aquifer can be extremely complex. The objective of this study was to hydraulically characterize a metamorphic aquifer in a representative area of Italy and to identify the most appropriate approach for tapping of groundwater in this challenging environment. The results of surface fracture surveys, injection tests, pumping tests, and a simplified numerical model were compared. From the surface fracture survey, a model of the rock mass characterized by a well-developed discontinuity network and by a high frequency of discontinuities resulted. The injection tests showed the extreme heterogeneity and the lower hydraulic conductivity of the rock mass in comparison with the results of the pumping tests. The independent estimate of the hydraulic parameter resulting from numerical model highlighted a range of values higher than those resulting from the pumping tests. The study demonstrated that the continuum medium approach can be used in the case of hard-rock aquifers with a dense network of discontinuities. The multi-scale approach is recommended for investigating hydraulic heterogeneity and significantly helps to identify the most promising areas for well locations and their characteristics in relation to the style of fracturing. OPEN ACCESSWater 2015, 7 4639

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Hard-rock aquifers in tropical regions: using science to inform development and management policy

Cited by 47 publications

References 9 publications

Hydrogeology of continental southern Italy

Hydrogeology of continental southern Italy

Groundwater Level Changes since 1978 in an African City on Basement Rocks: The Case of the CIEH Borehole in Ouagadougou (Burkina Faso)

A Multi-Scale Approach in Hydraulic Characterization of a Metamorphic Aquifer: What Can Be Inferred about the Groundwater Abstraction Possibilities

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