Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings
In arid regions, groundwater resources are prone to depletion due to excessive water use and little recharge potential. Especially in sand dune areas, groundwater recharge is highly dependent on vadose zone properties and corresponding water fluxes. Nevertheless, vadose zone water fluxes under arid...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
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| Series: | Vadose Zone Journal |
| Online Access: | https://doi.org/10.2136/vzj2013.02.0043 |
| _version_ | 1797771578179584000 |
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| author | H. Pfletschinger K. Prömmel C. Schüth M. Herbst I. Engelhardt |
| author_facet | H. Pfletschinger K. Prömmel C. Schüth M. Herbst I. Engelhardt |
| author_sort | H. Pfletschinger |
| collection | DOAJ |
| description | In arid regions, groundwater resources are prone to depletion due to excessive water use and little recharge potential. Especially in sand dune areas, groundwater recharge is highly dependent on vadose zone properties and corresponding water fluxes. Nevertheless, vadose zone water fluxes under arid conditions are hard to determine owing to, among other reasons, deep vadose zones with generally low fluxes and only sporadic high infiltration events. In this study, we present an inverse model of infiltration experiments accounting for variable saturated nonisothermal water fluxes to estimate effective hydraulic and thermal parameters of dune sands. A subsequent scenario modeling links the results of the inverse model with projections of a global climate model until 2100. The scenario modeling clearly showed the high dependency of groundwater recharge on precipitation amounts and intensities, whereas temperature increases are only of minor importance for deep infiltration. However, simulated precipitation rates are still affected by high uncertainties in the response to the hydrological input data of the climate model. Thus, higher certainty in the prediction of precipitation pattern is a major future goal for climate modeling to constrain future groundwater management strategies in arid regions. |
| first_indexed | 2024-03-12T21:38:36Z |
| format | Article |
| id | doaj.art-960856e478f641e29f2f777766ec0f54 |
| institution | Directory Open Access Journal |
| issn | 1539-1663 |
| language | English |
| last_indexed | 2024-03-12T21:38:36Z |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Vadose Zone Journal |
| spelling | doaj.art-960856e478f641e29f2f777766ec0f542023-07-27T05:56:47ZengWileyVadose Zone Journal1539-16632014-01-0113111410.2136/vzj2013.02.0043Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid SettingsH. Pfletschinger0K. Prömmel1C. Schüth2M. Herbst3I. Engelhardt4Federal Waterways Engineering and Research Institute (BAW)KarlsruheGermanyFreie Universität Berlin, Institute of MeteorologyGermanyTechnical Univ. of Darmstadt, Institute of Applied GeosciencesGermanyAgrosphere (IBG‐3), Institute of Bio‐ and GeosciencesForschungszentrum JülichGermanyTechnical Univ. of Darmstadt, Institute of Applied GeosciencesGermanyIn arid regions, groundwater resources are prone to depletion due to excessive water use and little recharge potential. Especially in sand dune areas, groundwater recharge is highly dependent on vadose zone properties and corresponding water fluxes. Nevertheless, vadose zone water fluxes under arid conditions are hard to determine owing to, among other reasons, deep vadose zones with generally low fluxes and only sporadic high infiltration events. In this study, we present an inverse model of infiltration experiments accounting for variable saturated nonisothermal water fluxes to estimate effective hydraulic and thermal parameters of dune sands. A subsequent scenario modeling links the results of the inverse model with projections of a global climate model until 2100. The scenario modeling clearly showed the high dependency of groundwater recharge on precipitation amounts and intensities, whereas temperature increases are only of minor importance for deep infiltration. However, simulated precipitation rates are still affected by high uncertainties in the response to the hydrological input data of the climate model. Thus, higher certainty in the prediction of precipitation pattern is a major future goal for climate modeling to constrain future groundwater management strategies in arid regions.https://doi.org/10.2136/vzj2013.02.0043 |
| spellingShingle | H. Pfletschinger K. Prömmel C. Schüth M. Herbst I. Engelhardt Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings Vadose Zone Journal |
| title | Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings |
| title_full | Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings |
| title_fullStr | Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings |
| title_full_unstemmed | Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings |
| title_short | Sensitivity of Vadose Zone Water Fluxes to Climate Shifts in Arid Settings |
| title_sort | sensitivity of vadose zone water fluxes to climate shifts in arid settings |
| url | https://doi.org/10.2136/vzj2013.02.0043 |
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