Geophysical investigation of low enthalpy geothermal potential and ground water reservoirs in the Sudano-Sahelian region of Cameroon

Kana, Janvier Domra; Djongyang, Noël; Raïdandi, Danwé; Nouck, Philippe Njandjock; Nouayou, Robert; Tabod, Tabod Charles; Sanda, Oumarou

doi:10.1016/j.jafrearsci.2015.06.007

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…All these aquifers are similar to those obtained by Betah (1976), Djeuda Tchapnga (1987), Kana et al (2015) and Meying et al (2018) in Northern Cameroon, and Teikeu et al (2012) in Yaoundé. Thus, these aquifers constitute the main aquifers in the area and are independent (Mafany et al 2006).…”

Section: Discussionsupporting

confidence: 89%

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Raouf

Njeudjang

Yue

et al. 2022

Preprint

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Djohong municipality is located at the border between Eastern Cameroon and Central African Republic (CAR), in the Mbere division. The region is a shelter for thousands of people fleeing the socio-political crisis in CAR and it lacks safe drinking water supply. Surface water, rainwater, and shallow groundwater wells are the main water sources. As a result, deep aquifers appear to be an affordable solution to the widespread water demand gap in the region of Djohong. Forty-nine Schlumberger vertical electrical sounding (VES) were carried out in the framework of this study with maximum current electrode spacing of 240 m. The purpose was to investigate the occurrences of groundwater and related structural elements in the study area, which hosts two refugee camps, Ngam and Borgop. Eight geoelectric profiles were realized and their geological characteristics vary from the altered part to the bedrock, with ferruginous sediments and metaconglomerates in between. The altered part is composed of topsoil, travertines, sandy clay, clayey sand, and fractured shales with different geophysical characteristics. Two aquifer systems were highlighted, respectively in the altered soils of clayey sand and low permeability fractured rocks. The upper aquifer made of clayey sand is located in Ngam camp with thickness of 5 to 15 m and resistivity of 700 – 1500 Ω.m. The lower aquifer which is considered the main aquifer is located in both camps. It is hosted in the low permeability fractured shales of the Ngam camp, with resistivity of 200 to 1000 Ω.m and thickness of 34 to 82 m. In the Borgop camp, it occurs in the fractured granitic bedrock at about 8 and 19 m deep. Structurally, the study area is controlled by several potential faults, with NE – SW strike as a whole. The present study highlighted favourable conditions reducing geological and hydrogeological limitations to provision of safe drinking water for refugees of the two camps in Djohong.

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Section: Discussionsupporting

confidence: 89%

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Raouf

Njeudjang

Yue

et al. 2022

Preprint

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“…The resistivity values ranged from 20.7 to 24,376 Ω•m in A curves. In agreement with to[23]., the A curve types give a best-fitted three-layered model with resistivity values of topsoil ranging from 1.6 to 4.72 m. The topsoil could be mostly composed of sand with low resistivity values. The second layer could be the weathered basement with resistivity and thickness values varying between 401 and 2342 Ω•m, and 2.7…”

supporting

confidence: 84%

“…The near-surface layer has variable resistivity values ranging from about 651 to 1573 Ω•m. The difference in the resistivity values is due to the variation in grain size [23]. The thickness of the top soil layer varies was very thin.…”

Section: Electrical Resistivity Anomaliesmentioning

confidence: 99%

Borehole Productivity Controlling Factors in Crystalline Bedrock Aquifer of Gk&#234;k&#234; Region, Center of C&#244;te d’Ivoire

Kouame¹,

Douagui²,

Kouamé³

et al. 2019

JWARP

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The presence of both weathered rocks and fractured crystalline bedrock aquifers makes Hydrogeology in Gbêkê region of Côte d'Ivoire. Access to water in this region is not easy. This study focuses on the influence of borehole depth, weathering thickness and electrical resistivity of the geological structures on borehole productivity that exploit the crystalline aquifer system. Bivariate analysis was used to determine the relationships between these factors and specific capacity for measuring borehole productivity. The values ranged from 0.0088 to 2.20 m 3 •h −1 •m −1 . The analysis shows that there is no correlation between productivity and weathering thickness. However, weathering depths between 15 and 35 m provide the highest specific capacity values (Qs ≥ 1 m 3 •h −1 •m −1 ). For hydrogeological discontinuities interest, boreholes located in KH, QH and H anomaly curve types were the most productive. As productivity diminishes with depth, a deeper borehole can be more productive if it reaches a geological structure that is favorable for groundwater flow. Those hydrogeological parameters are extremely important in borehole productivity in Gbêkê region.

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“…As the literature indicated, to unlock a significant fraction of this vast geothermal energy source additional major technological advances were still needed. Geophysical methods were among the three main disciplines applied to explore geothermal resources, including geology and the chemistry of thermal fluids [1,7]. Eugenio et al [8] described a data integration tool used to identify potentially undiscovered geothermal resources in the island of Sicily.…”

Section: Reviews Of Geothermal Developmentmentioning

confidence: 99%

Mechanism of Fiscal and Taxation Policies in the Geothermal Industry in China

Jiang

Lei

et al. 2016

Energies

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Abstract:Geothermal energy is one of the cleanest sources of energy which is gaining importance as an alternative to hydrocarbons. Geothermal energy reserves in China are enormous and it has a huge potential for exploitation and utilization. However, the development of the geothermal industry in China lags far behind other renewable energy sources because of the lack of fiscal and taxation policy support. In this paper, we adopt the system dynamics method and use the causal loop diagram to explore the development mechanism of fiscal and taxation policies in the geothermal industry. The effect of the fiscal and taxation policy on the development of the geothermal industry is analyzed. In order to promote sustainable development of the geothermal industry in China, the government should pay more attention to subsidies for the geothermal industry in the life-cycle stage of the geothermal industry. Furthermore, a plan is necessary to provide a reasonable system of fiscal and taxation policies.

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Geophysical investigation of low enthalpy geothermal potential and ground water reservoirs in the Sudano-Sahelian region of Cameroon

Cited by 10 publications

References 15 publications

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Borehole Productivity Controlling Factors in Crystalline Bedrock Aquifer of Gk&#234;k&#234; Region, Center of C&#244;te d’Ivoire

Mechanism of Fiscal and Taxation Policies in the Geothermal Industry in China

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Geophysical investigation of low enthalpy geothermal potential and ground water reservoirs in the Sudano-Sahelian region of Cameroon

Cited by 10 publications

References 15 publications

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Comprehensive Studies of Hydrogeophysical Potential of Groundwater Occurrences in Djohong Municipality, Adamawa Cameroon

Borehole Productivity Controlling Factors in Crystalline Bedrock Aquifer of Gk&amp;#234;k&amp;#234; Region, Center of C&amp;#244;te d’Ivoire

Mechanism of Fiscal and Taxation Policies in the Geothermal Industry in China

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Borehole Productivity Controlling Factors in Crystalline Bedrock Aquifer of Gkêkê Region, Center of Côte d’Ivoire