Hydrogeological investigations and groundwater vulnerability assessment and mapping for groundwater resource protection and management: State of the art and a case study

Chenini, Ismail; Zghibi, Adel; Kouzana, Lamia

doi:10.1016/j.jafrearsci.2015.05.008

Cited by 70 publications

(38 citation statements)

References 20 publications

(1 reference statement)

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“…The overlay and index DRIST method [6] which is considered to be an improvement of the popular DRASTIC method [1] was used in this study. The method is based on five parameters of the DRASTIC method namely: Depth to water level, net Recharge, Impact of the vadose zone, Soil media and Topography.…”

Section: Drist Methodsmentioning

confidence: 99%

“…The method is based on five parameters of the DRASTIC method namely: Depth to water level, net Recharge, Impact of the vadose zone, Soil media and Topography. The aquifer media and hydraulic conductivity present in the DRASTIC method are not used in the DRIST method as these parameters are difficult to estimate for fractured aquifers which dominate the study area and that the DRIST method only deals with subsurface conditions before pollutants entering the aquifer [6]. The vulnerability values are calculated in the same way as the DRASTIC method by [1].…”

Section: Drist Methodsmentioning

confidence: 99%

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Specific Groundwater Vulnerability Mapping: Case Study of Acid Mine Drainage in the Witbank Coalfield, South Africa

Sakala¹,

Fourie²,

Gomo³

et al. 2016

Environment and Water Resource Management / 837: Health Informatics / 838: Modelling and Simulation / 839: Power and Energy Sys

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This study highlights the usage of artificial neural networks in assessment of groundwater vulnerability. The network uses the DRIST input parameters (Depth to water level, Recharge, Impact of the vadose zone, Soils and Topography) as inputs and hydrochemistry data (Sulphate and Total Dissolved Solids (TDS)) as training data. The results of training and classification using sulphate and TDS were combined using a fuzzy (AND) operator to generate the groundwater vulnerability model. This technique was applied to Witbank Coalfield where acid mine drainage emanating from coal mining operations is a huge concern for surrounding environment and groundwater resources. The generated groundwater vulnerability model of Witbank Coalfield was validated using pH data from 25 groundwater samples. The results show very high negative correlation (0.7182) between the groundwater vulnerability model and pH. This shows that areas with high sulphate and high TDS values correlate with low pH indicative of the presence of possible acid mine drainage pollution. The approach was able to differentiate areas in terms of vulnerability to acid mine drainage which can aid policy and decision makers to make scientifically informed decisions on land use planning. The approach developed in this research need to be applied to other coalfields in order to evaluate its robustness to different hydrogeological and geological conditions.

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Section: Drist Methodsmentioning

confidence: 99%

Section: Drist Methodsmentioning

confidence: 99%

Specific Groundwater Vulnerability Mapping: Case Study of Acid Mine Drainage in the Witbank Coalfield, South Africa

Sakala¹,

Fourie²,

Gomo³

et al. 2016

Environment and Water Resource Management / 837: Health Informatics / 838: Modelling and Simulation / 839: Power and Energy Sys

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“…Hydraulic conductivity is necessary because it refers to the ability of the aquifer material to transmit water, and it controls the rate contaminant movement [1]. In general, a high vulnerability of an aquifer comes with a high value of hydraulic conductivity [41]. In the study, the hydraulic conductivity of the first aquifer layer was obtained based on the pumping tests applied to the available 47 monitoring wells in the Pingtung plain groundwater basin [28].…”

Section: Hydraulic Conductivity (C)mentioning

confidence: 99%

Modified Index-Overlay Method to Assess Spatial–Temporal Variations of Groundwater Vulnerability and Groundwater Contamination Risk in Areas with Variable Activities of Agriculture Developments

et al. 2019

Water

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The groundwater vulnerability (GV) assessment for contamination is an effective technique for the planning, policy, and decision-making, as well as for sustainable groundwater resource protection and management. The GV depends strongly on local hydrogeological settings and land-use conditions that may vary in response to the activities of agricultural development. In this study, a modified DRASTIC model, which employs an additional factor of land use coupled with the analytic hierarchy process (AHP) theory, was used to quantify the spatial and temporal variation of GV and groundwater contamination risk in the Pingtung groundwater basin. The results show that the GV slightly decreased due to the decrease in agricultural areas under the change of land use over two decades (1995–2017). The yearly changes or a shorter period of observations incorporated with the accurate land-use map in DRASTIC parameters could improve GV maps to obtain a better representation of site-specific conditions. Meanwhile, the maps of yearly contamination risk indicated that the counties of Jiuru and Ligang are at high risk of nitrate pollution since 2016. In other agriculture-dominated regions such as Yanpu, Changzhi, and Gaoshu in the Pingtung groundwater basin, the climate conditions influence less the temporal variations of groundwater contamination risk. The results of this study are expected to support policy-makers to adopt the strategies of sustainable development for groundwater resources in local areas.

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“…Embora as águas superficiais sejam mais vulneráveis a esta poluição do que as águas subterrâneas, quando estas são contaminadas, não é fácil intervencionar-se para melhorar a sua qualidade (chenini et al, 2015). A vulnerabilidade de um sistema aquífero à poluição está relacionada com diversos aspetos, nomeadamente, com a litologia, a geometria do espaço em que está confinado e a hidrogeologia (chenini et al, 2015;Varol & Davraz, 2010;Moratalla et al, 2011). Quando se faz a avaliação da qualidade da água de um sistema aquífero, deve atender-se aos vários aspetos hidrogeológicos, isto é, à sua zona de recarga, ao seu caudal e aos usos do solo na região.…”

Section: áGuas Subterrâneas E Intrusão Salinaunclassified

Risco de intrusão salina e desenvolvimento sustentável: gestão integrada de água subterrâneas

Carvalho¹,

Ponte²,

Veloso³

et al. 2016

TER

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Tal como outros aquíferos costeiros, o Sistema Aquífero da Mexilhoeira Grande - Portimão (Algarve), está sob a ameaça da intrusão salina. Analisou-se a evolução nos últimos 30 anos dos níveis piezométricos, do balanço hídrico, de alguns indicadores da qualidade da água e dos usos do solo. Conclui-se que a salinidade devida à intrusão salina e/ou à presença de diapiros está confinada a zonas restritas e que, desde que devidamente monitorizado, este aquífero pode contribuir para a implementação de novos projetos agrícolas importantes para a economia da região.

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Hydrogeological investigations and groundwater vulnerability assessment and mapping for groundwater resource protection and management: State of the art and a case study

Cited by 70 publications

References 20 publications

Specific Groundwater Vulnerability Mapping: Case Study of Acid Mine Drainage in the Witbank Coalfield, South Africa

Specific Groundwater Vulnerability Mapping: Case Study of Acid Mine Drainage in the Witbank Coalfield, South Africa

Modified Index-Overlay Method to Assess Spatial–Temporal Variations of Groundwater Vulnerability and Groundwater Contamination Risk in Areas with Variable Activities of Agriculture Developments

Risco de intrusão salina e desenvolvimento sustentável: gestão integrada de água subterrâneas

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