Groundwater recharge estimation under semi arid climate: Case of Northern Gafsa watershed, Tunisia

Melki, Achraf; Abdollahi, Khodayar; Fatahi, Rouhollah; Abida, Habib

doi:10.1016/j.jafrearsci.2017.04.020

Cited by 29 publications

(7 citation statements)

References 11 publications

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“…The results mentioned above have been compared with the results of some researchers and similar relationships have been obtained (Batalha et al 2018;Caiqiong and Jun 2016;Dandekar et al 2018;Hou et al 2017;Kambale et al 2017;Melki et al 2017;Nasta et al 2018;Szymkiewicz et al 2018;Vogel 2019;Yang et al 2019). The most important difference of this study from other groundwater recharge studies or hydrogeological studies carried out in Turkey was to…”

Section: Model Calibration and Validationsupporting

confidence: 76%

Groundwater recharge estimation using HYDRUS 1D model in Alaşehir sub-basin of Gediz Basin in Turkey

Tonkul

Baba

Şimşek

et al. 2019

Environ Monit Assess

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Gediz Basin, located in the western part of Turkey constituting 2% land of the country, has an important groundwater potential in the area. Alasehir sub-basin, located in the southeast of the Gediz Basin and subject to the extensive withdrawal for the irrigation, constitutes the study area. Natural recharge to the sub-basin due to precipitation is numerically investigated in this study. For this purpose, 25 research wells, whose depths range from 20 to 50 m, were drilled to observe the recharge and collect the necessary field data for the numerical model. Meteorological data were collected from 3 weather stations installed in the study area. The numerical model HYDRUS was calibrated using the field water content data. Soil characterization was done on the core samples; the aquifer characterization was performed, and the alluvial aquifer recharge due to precipitation was calculated. As a result, the computed recharge value ranges from 21.78 to 68.52 mm, with an average value of 43.09 mm. According to the numerical model, this amount of recharge corresponds to 10% of the amount of annual rainfall.

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Section: Model Calibration and Validationsupporting

confidence: 76%

Groundwater recharge estimation using HYDRUS 1D model in Alaşehir sub-basin of Gediz Basin in Turkey

Tonkul

Baba

Şimşek

et al. 2019

Environ Monit Assess

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show abstract

“…Therefore, it is better to consider the effects of climate change on hydrology. Globally, some previous studies distinguished the effects of climate change and urbanization on watershed hydrology [50][51][52][53]. It is noted that the climate change should be considered at a relatively longer time scale.…”

Section: The Impacts Of Urbanization On Water Balancementioning

confidence: 99%

WetSpass-Based Study of the Effects of Urbanization on the Water Balance Components at Regional and Quadrat Scales in Beijing, China

Zhang

Liu

Cheng

et al. 2017

Water

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Abstract:China is the largest country in terms of population and its booming urbanization has exerted negative effects on ground-surface hydrological processes at different spatial scales, land-use types, and water balance, such as surface runoff, groundwater recharge, and evapotranspiration. However, it is not yet well understood as to how the modifications of the spatial patterns of landscapes affect the water balance on a regional scale. In this study, the water and energy transfer among soil, plants, and atmosphere (WetSpass) model was applied to evaluate the urbanization effects on the water balance on a regional scale by using Beijing as the case city for this current study. The relationships among impervious surfaces, landscape pattern indices, and water balance components were also quantified. Results indicated built-up land in 2012 was 673 km 2 larger than it in 2000, mostly converted from croplands. WetSpass model also indicated the variation rates of annual average surface runoff, evapotranspiration and groundwater recharge were 7%, 0.4% and −2% in the whole Beijing area, while they reached 52%, 6% and −24% in the urban area of Beijing from 2000 to 2012, respectively. At a city scale, four districts-Dongcheng, Xicheng, Chaoyang, and Haidian-were characterized by higher impervious percentage, as reflected by lower groundwater recharge and higher surface runoff than other districts. At quadrat scale, however, groundwater recharge (surface runoff) was negatively (positively) correlated with impervious percentages. For landscape indices, the Aggregation Index was positively correlated with surface runoff and negatively correlated with groundwater recharge while Patch Density Index, Splitting Index, Patch Richness Density Index, and Shannon's Diversity Index presented opposite relationships. The results of this study can help to develop human knowledge about the impacts of urbanization on hydrological cycles on a regional scale.

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“…Just like most of the countries in the world, the populations in southern Mediterranean countries live under water stress (< 450 l/person/year), defined as those using more than 20% of their renewable water resources (WBGU 2003), while the withdrawal of over 40-50% mean serious water stress (Pittock 2007;Melki et al 2017;El Gayar and Hamed 2017;Hamed 2017). Currently the ONU estimates that in 2025, 25 African countries are expected to suffer from water scarcity or water…”

Section: Introductionmentioning

confidence: 99%

Climate impact on surface and groundwater in North Africa: a global synthesis of findings and recommendations

Hamed

Hadji

Redhaounia

et al. 2018

Euro-Mediterr J Environ Integr

189

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Climate change is having short-and long-term impacts on surface and groundwater in the northern part of the African continent. This has led to a wide range of consequences that have added pressure on the groundwater systems in this part of the world. Among such pressures, we can cite the mal-distribution and the irregularity of precipitation and ice, flooding, evaporitic sediments input by the drainage net, water degradation, mud stagnation in dams, dead tranche, drought, decreasing of the natural recharge and increasing of the groundwater abstraction, conflict between trans-boundary waters, desertification, imbalance between the regions, migration, revolution, socio-economic imbalance, etc. Actually, watermonitoring networks indicate noticeable hydrogeologic variations and a rise of the groundwater salinity. It was confirmed by the geochemical analysis of water resources that showed scattered data between the northern part characterized by low mineralized groundwater (TDS ranging 0.4-3 g/l) and the southern area where the salinity ranges from 2.5 to 90 g/l. The obtained values are far above the permissible limits for both human consumption, agricultural and tourist activities. These effects, when compounded, are anticipated to worsen the situation and to constitute veritable threats for social and economic development in these regions of North Africa (Morocco, Algeria, Tunisia, Libya, Egypt, etc.). The potential solutions consist of taking urgent to utilize the intelligent technology (bio and nano-technology), policies relevant policies to manage water resources, and the engagement of private, civil, and international sectors if a major crisis is to be averted (collective effort).

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Groundwater recharge estimation under semi arid climate: Case of Northern Gafsa watershed, Tunisia

Cited by 29 publications

References 11 publications

Groundwater recharge estimation using HYDRUS 1D model in Alaşehir sub-basin of Gediz Basin in Turkey

Groundwater recharge estimation using HYDRUS 1D model in Alaşehir sub-basin of Gediz Basin in Turkey

WetSpass-Based Study of the Effects of Urbanization on the Water Balance Components at Regional and Quadrat Scales in Beijing, China

Climate impact on surface and groundwater in North Africa: a global synthesis of findings and recommendations

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