Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Assessing the Effects of Epikarst on Groundwater Recharge and Regional Fast-Flow Pathways in a Karstic Aquifer via Impulse-Response Functions
AbstractA statistical impulse-response model based on multiple-lag correlations was constructed to determine the delayed aquifer response of precipitation events due to the epikarst in a karstic aquifer. The model was used to identify the direction and travel time of slow-diffuse flows and bimodal flows including slow-diffuse and fast-concentrated flows in wet years. Fast-concentrated flows with 0–15-day delays between precipitation events and aquifer response indicated rapid drainage of recharged water from the epikarst. A computed 46–75-day delay in the aquifer response in slow-diffuse flows was the upper bound for the epikarst retention time. The model identified the activation of a new fast-concentrated flow path due to subsurface water storage beneath the precipitation-fed recharge area when the system had high antecedent moisture. For the wettest year following moderately low antecedent moisture conditions, the model identified regional flow pathways extending over a 50–180-km distance. These results suggest that impulse-response models can be used independently to gain insights into the location of preferential pathways and the role of epikarst retention time in aquifer recharge.
Assessing the Effects of Epikarst on Groundwater Recharge and Regional Fast-Flow Pathways in a Karstic Aquifer via Impulse-Response Functions
AbstractA statistical impulse-response model based on multiple-lag correlations was constructed to determine the delayed aquifer response of precipitation events due to the epikarst in a karstic aquifer. The model was used to identify the direction and travel time of slow-diffuse flows and bimodal flows including slow-diffuse and fast-concentrated flows in wet years. Fast-concentrated flows with 0–15-day delays between precipitation events and aquifer response indicated rapid drainage of recharged water from the epikarst. A computed 46–75-day delay in the aquifer response in slow-diffuse flows was the upper bound for the epikarst retention time. The model identified the activation of a new fast-concentrated flow path due to subsurface water storage beneath the precipitation-fed recharge area when the system had high antecedent moisture. For the wettest year following moderately low antecedent moisture conditions, the model identified regional flow pathways extending over a 50–180-km distance. These results suggest that impulse-response models can be used independently to gain insights into the location of preferential pathways and the role of epikarst retention time in aquifer recharge.
Assessing the Effects of Epikarst on Groundwater Recharge and Regional Fast-Flow Pathways in a Karstic Aquifer via Impulse-Response Functions
Başağaoğlu, Hakan (Autor:in) / Green, Ronald T / Gergen, Leslie
2015
Aufsatz (Zeitschrift)
Englisch
Conceptual model of groundwater flow in a mantled karst aquifer and effects of the epikarst zone
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Karstic groundwater flow characteristics in the Cretaceous Chalk aquifer, Northern Ireland
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Karstic groundwater flow characteristics in the Cretaceous Chalk aquifer, Northern Ireland
| British Library Online Contents | 1999