Groundwater as an Element in the Hydrological Cycle

Alley, William M.; Baugh, James W La; Reilly, Thomas E.

doi:10.1002/0470848944.hsa153

Cited by 7 publications

(9 citation statements)

References 48 publications

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“…Podzemna voda se pojavlja skoraj povsod pod zemeljskim površjem in predstavlja najobčutljivejšo in največjo razpoložljivo zalogo sladke vode v tekočem stanju na Zemlji (Quevauviller, 2008;Lerner, Harris, 2009;Alley, La Baugh, Reilly, 2005). Zaradi velikih zalog, geografske razširjenosti, kakovosti ter neobčutljivosti na sezonska nihanja predstavlja podzemna voda razpoložljiv, varen in obnovljiv vodni vir.…”

Section: Upravljanje S Podzemno Vodo V Slovenijiunclassified

Evaluation of the intensity of environmental pressures from agriculture on groundwater in Slovenia

Lampič

Rutar

2021

dela

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Using a composite environmental index, we assessed how environmentally sustainable agriculture is by examining water bodies of groundwater (WBG) in Slovenia. Apart from studying identifiable differences among 21 WBG, we also analysed and detailed the pressures of agricultural activities including by different types of aquifer porosity. We found that the most heavily burdened WBG have an intergranular type of porosity. From the standpoint of environmental sustainability agriculture is ill-suited on all five of the alluvial plains with intergranular aquifers in Slovenia. The lowest index was calculated in the area of the WBG in the Drava basin (-0.54), followed by the Mura (-0.34) and Sava basin together with the Ljubljana Marshes (-0.24). In order to better illustrate responsiveness, through analysis of spatial patterns of ecologically cultivated areas, we evaluated the distribution of the most sustainable agricultural practices and found that organic farming is more prevalent on water bodies with predominantly karst type of porosity (17.1% of organically cultivated agricultural land) and it occurs least on alluvial plains with intergranular aquifers (barely 3.7% of organically cultivated agricultural land). Calculations of the sustainability index of agriculture at the level of WBG proved to be very suitable approach for determining environmental sustainability.

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Section: Upravljanje S Podzemno Vodo V Slovenijiunclassified

Evaluation of the intensity of environmental pressures from agriculture on groundwater in Slovenia

Lampič

Rutar

2021

dela

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“…So, even if theoretically the rate of natural recharge is irrelevant, it has an indirect influence on the capture: the natural recharge controls the natural predevelopment groundwater discharge, which is subject to capture by pumping wells (Konikow and Leake ). The topic of the influence of the natural recharge in determining the rate of pumping is discussed by several authors (Alley et al ; Kalf and Woolley ; Sophocleous ; Zhou ). According to Zhou (), when the new steady‐state conditions are reached, the following equation can be written:

R_{0} + Δ R = Q + D_{r}

where D r is the residual discharge:

D_{r} = D_{0} - Δ D

…”

Section: Basic Concepts Of Sustainable Yieldmentioning

confidence: 99%

Sustainable Yield of a Hydrothermal Area: From Theoretical Concepts to the Practical Approach

Piscopo¹,

Luca²,

Dimasi³

et al. 2018

Groundwater

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Sustainable use of groundwater in the hydrothermal area of Viterbo (Central Italy) was analyzed. In this area, multipurposes utilization of groundwater coexists: several thermal springs and wells supply spas and public pools, cold and fresh water is used for irrigation and drinking‐water. Starting from theoretical concepts, a management plan has been developed to ensure groundwater sustainability in response to the increased demand of withdrawal from thermal wells, by integrating previous hydrogeological studies, new investigations and a new finite‐difference model. The most stringent constraints considered are: to maintain the quality of thermal and fresh waters, to limit the effects on the hydraulic equilibrium existing between overlapping aquifers, to ensure a significant flow to the natural thermal springs and the quality and flow rate of the spring used for drinking purposes. The practical approach included identification of the maximum pumping rate from the wells of the spas, analysis of the response time of the system under development and drafting of a safeguard and monitoring plan. The case examined takes into account the complexity of the task in defining practical measures for groundwater management on the basis of theoretical concepts of its sustainable use. A participative approach among the different water decision‐makers and adaptive management in the use of groundwater resources with different quality represent the key points to overcome conflicts between different users, with the awareness of the ineludible uncertainties of the hydrogeological model.

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“…The exchange of water between streams and aquifers influences the quality and quantity of water within both domains according to the fluxes and water chemistry of the water moving through the streambed and the changes that occur at the groundwater-surface water interface (Ruehl et al, 2006). These interactions are essential for water supply, water quality and aquatic ecosystems (Sophocleous, 2002;Alley et al, 2006) and thus they are important for the sustainable management of water resources.…”

Section: Figures Back Closementioning

confidence: 99%

“…In lowland rivers, complex heterogeneities Figures of the sediment and therefore the hydraulic conditions, pose a major challenge to use this approach (Krause et al, 2012). Individual precipitation events may change the direction of water exchange between the surface and subsurface on a daily or even shorter time horizon, due to localized recharge near the stream banks, flood peaks moving downstream or transpiration by river bank vegetation (Alley et al, 2006). Highly variable exchange fluxes are reported for intense precipitation seasons (Mendoza et al, 2008;Bartsch et al, 2014).…”

Section: Figures Back Closementioning

confidence: 99%

Investigation of seasonal river–aquifer interactions in a tropical coastal area controlled by tidal sand ridges

Calderón

Uhlenbrook

2014

Preprint

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Abstract. Water exchanges between streams and aquifers influence the quantity and quality of water in both domains. Seasonal river–aquifer interactions were investigated in a tropical coastal area where tidal sand ridges control river discharge to the sea. The study site is located in southwestern Nicaragua, dominated by humid tropical hydro-climatic conditions. The aquifer provides water to the rural town of Ostional. Connectivity between the river and the aquifer influences water quality and water availability for humans and for the downstream estuarine ecosystem. The effect of stream stage fluctuations on river–aquifer flows and pressure propagation in the adjacent aquifer was investigated analyzing high temporal resolution hydraulic head data and applying a numerical model (HYDRUS 2-D). Tidal sand ridges at the river outlet control the flow direction between the river and the aquifer. Surface water accumulation caused by these features induces aquifer recharge from the river. Simulations show groundwater recharge up to 0.2 m3 h−1 per unit length of river cross section. Rupture of the sand ridges due to overtopping river flows causes a sudden shift in the direction of flow between the river and the aquifer. Groundwater exfiltration reached 0.08 m3 h−1 immediately after the rupture of the sand ridges. Simulated bank storage flows are between 0.004–0.06 m3 h−1. These estimates are also supported by the narrow hysteresis loops between hydraulic heads and river stage. The aquifer behaves as confined, rapidly transmitting pressure changes caused by the river stage fluctuations. However, the pressure wave is attenuated with increasing distance from the river. Therefore, we concluded that a dynamic pressure wave is the mechanism responsible for the observed aquifer responses. Pressure variation observations and numerical groundwater modeling are useful to examine river–aquifer interactions and should be coupled in the future with chemical data to improve process understanding.

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Groundwater as an Element in the Hydrological Cycle

Cited by 7 publications

References 48 publications

Evaluation of the intensity of environmental pressures from agriculture on groundwater in Slovenia

Evaluation of the intensity of environmental pressures from agriculture on groundwater in Slovenia

Sustainable Yield of a Hydrothermal Area: From Theoretical Concepts to the Practical Approach

Investigation of seasonal river–aquifer interactions in a tropical coastal area controlled by tidal sand ridges

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