Modelling of the Complex Groundwater Level Dynamics during Episodic Rainfall Events of a Surficial Aquifer in Southern Italy
| Autor: | Vincenzo Simeone, Nicola Pastore, Concetta I. Giasi, Claudia Cherubini, Angelo Doglioni |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Hydraulic engineering
Groundwater flow Water table Episodic rainfall surficial aquifer unsaturated flow preferential flow kinematic dispersion wave model random walk confined-unconfined flow conversion kinematic dispersion wave model Geography Planning and Development Aquifer episodic rainfall Aquatic Science Biochemistry unsaturated flow random walk lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Vadose zone Water Science and Technology Surficial aquifer Hydrology geography lcsh:TD201-500 geography.geographical_feature_category Hydrogeology surficial aquifer preferential flow confined-unconfined flow conversion SH3_1 Ambientale Groundwater recharge Groundwater Geology |
| Zdroj: | Water, Vol 12, Iss 2916, p 2916 (2020) Water Volume 12 Issue 10 |
| Popis: | We analyzed the complex dynamics that are involved the groundwater level variations due to the episodic rainfall supply in the Ionian coastal plain surficial aquifer located in Southern Italy. In this aquifer, as a consequence of the particular hydrogeological framework, both direct and lateral recharge mechanisms coexist. Hence, the dynamics of groundwater level variations are quite complex and strongly non-linear. Our focus was essentially on the short-term behavior of groundwater levels, with a specific analysis on episodic rainfall events. To model these dynamics, due to the presence of the preferential pathways in the infiltration processes, a kinematic dispersion wave model was used. Specifically, a one-dimensional and non-linear particle-based numerical model was developed. It uses ideal particles with constant water volume travel, according to celerity and hydraulic dispersion, to simulate the infiltration rate wave through the vadose zone. The infiltration rate that reaches the water table represents the input function to evaluate the aquifer groundwater level fluctuations. As a consequence of the special lithological and storage capacity characteristics of the surficial layers, groundwater flow conditions change from unconfined to confined. The developed model analyzes the direct groundwater supply under natural conditions, including episodic rainfall, and it has been validated using a high-resolution time series of rainfall data and groundwater level obtained from the monitoring station Terra Montonata. |
| Databáze: | OpenAIRE |
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