Heterogeneity of hydrodynamic properties and groundwater circulation of a coastal andesitic volcanic aquifer controlled by tectonic induced faults and rock fracturing – Martinique island (Lesser Antilles – FWI)

Vittecoq, Benoît; Reninger, Pierre-Alexandre; Violette, Sophie; Martelet, Guillaume; Dewandel, Benoı̂t; Audru, J.

doi:10.1016/j.jhydrol.2015.09.022

Cited by 30 publications

(25 citation statements)

References 32 publications

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“…Where the effect of a barrier during pumping is insignificant, other methods are required to detect its presence. These might include surface or aerial geophysics (Ball et al 2010;Vittecoq et al 2015), geochemistry and environmental tracers (Toutain and Baubron 1999;Umeda and Ninomiya 2009;Pereira et al 2010;Rajabpour and Vaezihir 2016;Sun et al 2018), and lineament analysis (Sander et al 1997;Tam et al 2004). Analysis of the prepumping potentiometric surface might also provide information on the existence of barriers to flow (Bense et al 2003;Seaton and Burbey 2005), although often bore networks are sparse in areas that are not affected by groundwater pumping.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Undetected Barriers on Groundwater Drawdown and Recovery

Marshall¹,

Cook

Miller

et al. 2019

Groundwater

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In large‐scale pumping projects, such as mine dewatering, predictions are often made about the rate of groundwater level recovery after pumping has ceased. However, these predictions may be impacted by geological uncertainty—including the presence of undetected impermeable barriers. During pumping, an impermeable barrier may be undetected if it is located beyond the maximum extent of the cone of depression; yet it may still control drawdown during the recovery phase. This has implications for regional‐scale modeling and monitoring of groundwater level recovery. In this article, non‐dimensional solutions are developed to show the conditions under which a barrier may be undetected during pumping but still significantly impact groundwater level recovery. The magnitude of the impact from an undetected barrier will increase as the ratio of pumping rate to aquifer transmissivity increases. The results are exemplified for a hypothetical aquifer with an unknown barrier 3 km from a pumping well. The difference in drawdown between a model with and without a barrier may be <1 m in the 10 years while pumping is occurring, but up to 50 m after pumping has ceased.

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Section: Discussionmentioning

confidence: 99%

The Effect of Undetected Barriers on Groundwater Drawdown and Recovery

Marshall¹,

Cook

Miller

et al. 2019

Groundwater

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“…The run-out distance for shallow landslides was Run-out assessments were computed from the cells with FoS ≤ 1 for shallow landslides and deep landslides for the worst scenario (i.e., GWL = 0.9). The maximum run-out distance retained was 80 m for shallow landslides and 80 m for deep landslides, following previous studies and calibration for shallow landslides and deep landslides [33][34][35][36]38,70]. This distance took into account the maximum run-out distance observed for each type of phenomenon plus a safety distance of 10 m and 20 m for shallow and deep landslides, respectively.…”

Section: Analysis Of Slope Stability and Run-out Spatializationmentioning

confidence: 99%

“…If the use of this method seems expensive, the multiplicity of sensors used in parallel allows for a reduction in costs by comparison with the same investigations on the ground. In Martinique, such a survey has been available since 2013 [32,33]. The main goal was to collect new information about the rocks (geology, lithology) and reveal the subsoil (regolith, hydrogeology) up to 200 m depth using the Time Domain Electromagnetic Method (TDEM).…”

Section: Introductionmentioning

confidence: 99%

Analysis of Slope Sensitivity to Landslides by a Transdisciplinary Approach in the Framework of Future Development: The Case of La Trinité in Martinique (French West Indies)

Thiéry¹,

Reninger

Lacquement

et al. 2017

Geosciences

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Landslide hazard and risk assessment (LHA & LRA) in the French West Indies is a big challenge, particularly in Martinique, where several factors contribute to high slope sensitivity to landslides. This sensitivity is particularly due to volcanic ground, hurricane seasons, and growing pressure from urban development. Thus, to protect future goods and inhabitants and avoid increased slope sensitivity to landslide, it is necessary to analyze by different ways and complementary approaches the future planned areas. This research focuses on a site the City Council of 'La Trinité' wishes to develop. The goals consist of locating landslide-prone areas and providing some recommendations/indications for future projects. The site is characterized by a hilly topography alternating steep slopes, gentle slopes, and eroded areas and is located on a complex lithology (i.e., andesite, basalt, and weathered materials). By combining several approaches and techniques (geology, geomorphology, geophysics, and modeling), it is demonstrated that some areas are particularly susceptible to landslide, notably where colluviums are juxtaposed to highly weathered materials. The different documents produced, based on modeling and expert knowledge, combined with indications should allow the definition of new susceptibility classes, taking into account probable anthropic influence and development. Even if the temporal probability of the experimental documents is not taken into account, they help with refining knowledge of landslide-prone areas and different types of instability. The documents should be discussed with end users for future planning.

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“…Understanding the hydrodynamic functioning of volcanic aquifer systems is confronted with the difficulty of dealing with their geometrical complexity and the high spatial heterogeneity of the recharge processes and flow parameters distributions [1] [2] [3] [4]. Volcanic aquifers have been studied quite extensively in developed countries [5] [6], but few studies have been undertaken in developing countries [7], where they are very often the only available water resources [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Groundwater Resources in a Complex Volcanic Reservoir with Limited Data Sets in a Semi-Arid Context Using a Novel Stochastic Approach. The Goda Volcanic Massif, Republic of Djibouti

Ahmed¹,

Coz²,

Jalludin³

et al. 2018

JWARP

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This work focuses on the modeling and evaluation of water resources in complex aquifer systems and the use of scarce data. The modeling work is developed based on the GLUE (Generalized Likelihood Uncertainty Estimation) method. This method is still little used in hydrogeology, although its applications in other disciplines such as hydrology proved quite efficient. The study site, located in the Republic of Djibouti (Horn of Africa), is represented by the volcanic massif of Goda. The hydraulic properties of this massif are highly heterogeneous since they are associated with fracturing and weathering of the geological formations. The data are too few to enable a conventional modeling approach of this volcanic system. The implementation of the GLUE method in a numerical groundwater flow model allowed developing a stochastic analysis of the spatial distribution of the hydraulic conductivity and the recharge modalities of this complex volcanic system. The hydraulic conductivities range from 10 −6 to 10 −8 m•s −1 for the basalt and the rhyolite formations (values are yet generally lower for rhyolites) and are higher than 5 × 10 −7 for the sedimentary formations. In addition, considering diffuse recharge as the main mechanism by which the precipitation reaches the aquifer results in more consistent groundwater head simulations than considering only indirect recharge. The average recharge amount estimated for the Goda aquifer system is 28 mm•yr −1. The results led to a numerical representation of this system, with the least uncertainty. This model was able to estimate the available water resources of this system. This result is important because the Goda system sup- plies water to the city of Tadjourah. Assessment of available resources is vital for the future development of this city. From a methodological point of view, the GLUE method proved very promising for water resources assessment in complex hydrogeological systems for which little data are available.

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Heterogeneity of hydrodynamic properties and groundwater circulation of a coastal andesitic volcanic aquifer controlled by tectonic induced faults and rock fracturing – Martinique island (Lesser Antilles – FWI)

Cited by 30 publications

References 32 publications

The Effect of Undetected Barriers on Groundwater Drawdown and Recovery

The Effect of Undetected Barriers on Groundwater Drawdown and Recovery

Analysis of Slope Sensitivity to Landslides by a Transdisciplinary Approach in the Framework of Future Development: The Case of La Trinité in Martinique (French West Indies)

Assessment of Groundwater Resources in a Complex Volcanic Reservoir with Limited Data Sets in a Semi-Arid Context Using a Novel Stochastic Approach. The Goda Volcanic Massif, Republic of Djibouti

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