Groundwater and climate in Africa—a review

Taylor, Richard G.; Koussis, Antonis D.; Tindimugaya, Callist

doi:10.1623/hysj.54.4.655

Cited by 102 publications

(67 citation statements)

References 56 publications

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“…A SDW in this context mean a well that is ≤ 15 m deep (De Louw et al 2013). These, are often easy to dig and the wells themselves act as own reservoirs hence making storage tanks unneeded (Taylor et al 2009;Job 2010) and in many areas there are local skills to develop and manage them (Wurzel 2001;Pritchard et al 2008;Hardjoamidjojo et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Indigenous knowledge on development and management of shallow dug wells of Dodoma Municipality in Tanzania

et al. 2018

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Dodoma city, central Tanzania, seats in a semi-arid region of East Africa with limited rains and surface water resources. Consequently, the area largely depends on shallow and deep aquifers for its freshwater needs. Owing to harsh climatic conditions, chronic lack of year-round surface water bodies and, limited development of water distribution infrastructures, over year's local people have nurtured, developed and, passed on important indigenous knowledge (IK) on exploiting and managing shallow aquifers (SAs). However, there is no clear documented administrative plans for the SAs and the roles of IK, which is widely practised in developing SDWs and managing SAs, are not properly documented. This study intended to assess the extent of shallow dug wells (SDWs) utilization and contribution of IK on management of SAs of indigenous people of Dodoma Municipality. The methods followed include critical field observations, measurements and, focus group discussions done during both the dry season (Sep.-Oct. 2013) and wet season (Dec. 2013-Feb. 2014). The results show that SDWs occur widely in the city, particularly in the suburbs, where they often serve as the only sources of freshwater and heavily dependent by the populace. It is clear that there is rich IK on management of SAs including on groundwater exploration, digging, water allocation, pricing, and even on water quality and, water treatment skills. The aforementioned IK clearly contribute to water sufficiency to the populace and general management of groundwater such as enhancing recharge mechanisms where about 1% of local rainfall is recharged through a network of SDWs compared to ~ 5-10% that is naturally being recharged by rainfall through the vadose zone. Thus, as much as the current policy framework and groundwater managers do not recognize the roles of IK and contributions of SDWs as key water sources, it is clear that IK contributes to the groundwater management and SDWs already support large part of the society. While it is globally appreciated that vital skills on SDWs management are vanishing, local people in Dodoma still retain them and should, therefore, be preserved. It is further recommended that IK are strengthened, improved and most importantly, incorporated in the local water resources management plans that already advocate on integrated approaches but which clearly ignores the IK and the local people's efforts to explore and manage water resource, particularly SAs.

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Section: Introductionmentioning

confidence: 99%

Indigenous knowledge on development and management of shallow dug wells of Dodoma Municipality in Tanzania

et al. 2018

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“…Seno province (about 7,000 km 2 ) is located in the extreme north of Burkina Faso in West Africa ( The vegetation of Seno province gradually spreads from thorn-bush steppe to phytogeographic domain of sahelian north [9]. On hydrographical terms, Seno province consists of many natural ponds, shallows and intermittent rivers.…”

Section: Study Sitementioning

confidence: 99%

“…However, groundwater availability and mobilization are strongly influenced by the large variability in geology, geomorphology/weathering and rainfall (both current and historic) [1]. One of its most important advantages is its much slower response to climate variations [2].…”

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confidence: 99%

Optimizing the Interpretation of Sub-surface Resistivity in Relation with Borehole Productivity in Basement Area Applied to Seno Province (Burkina Faso)

Koita¹,

Yonli²,

Nikiema³

2016

JESE-B

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This study aims at identifying possible correlations between shapes, types of geophysical anomalies and borehole productivity according to geological and hydrogeological contexts. The methodology adopted was a two-pronged one-the first step sought to: (i) interpret the electrical resistivity values from horizontal profiling and vertical electrical sounding implemented in Seno province that preceded the drilling of 513 boreholes; (ii) interpret data from pumping tests carried out on boreholes having a discharge superior to 1 m 3 /h ("positive borehole") by using Cooper-Jacob's method. In the second step, according to geology, authors tried to identify possible correlations between each of the qualitative geophysical parameters: «shape of anomaly», «type of anomaly» and «type curve» on the one hand, and hydrogeological parameters such as discharge, alteration thickness, transmissivity and saturated level on the other. The results of this study have shown that the chances of having a positive borehole in Seno province are higher when the type of anomaly is TCC (80%), shape of anomaly is "W" and when type curve is "H" (80%) for all geological formations. Granitic formations are those that record higher discharges while schists record high transmissivity values.

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“…In Burkina Faso, uncertainties about the beginning and end of seasons, the increase in the number and duration of dry pockets duringwet seasons, the scarcity or seasonality of surface waters are factors contributing to the pressure on groundwater resources (N'go et al, 2005). Indeed, groundwater has been considered as less vulnerable to drought (Taylor et al, 2009). Access to groundwater is conditioned by the drilling wells or boreholes of good quality, able of lasting over time.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Exploitation Rate and Sustainability of an Alluvial Plain in Southwestern Burkina Faso

Compaor¹,

Dara²,

Ko³

et al. 2018

JNS

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The alluvial aquifer of Karfiguéla in the Comoé province (southwestern Burkina Faso) is increasingly being used for irrigation. Despite its crucial importance for farmers, the exploitation rate of this aquifer and its water supply are poorly known. In this context the assessment of the exploitation rate and sustainability of the Karfiguéla alluvial aquifer was initiated for a better management of groundwater resources in the Southwest of Burkina Faso. The assessment of the exploitation rate requires both the evaluation of groundwater extraction and recharge. These two parameters were determined respectively by the quantification of groundwater extraction volumes for crop needs and water balance methods. The annual recharge is substantially identical to the annual renewed water volume of the aquifer. This recharge is around 1,885,000 m 3 or about 4% of the average annual rainfall. Groundwater extraction is low and represents 10% of the renewed water volume. So, the alluvial aquifer of Karfiguéla has a sufficient recharge to compensate groundwater extraction. The sustainability of its exploitation does not seem to be threatened.

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Groundwater and climate in Africa—a review

Cited by 102 publications

References 56 publications

Indigenous knowledge on development and management of shallow dug wells of Dodoma Municipality in Tanzania

Indigenous knowledge on development and management of shallow dug wells of Dodoma Municipality in Tanzania

Optimizing the Interpretation of Sub-surface Resistivity in Relation with Borehole Productivity in Basement Area Applied to Seno Province (Burkina Faso)

Assessment of the Exploitation Rate and Sustainability of an Alluvial Plain in Southwestern Burkina Faso

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