In: Journal of Hydrology and Hydromechanics, vol. 66, no. 2
Adam Szymkiewicz - Anna Gumuła-Kawęcka - Jirka Šimůnek - Bertrand Leterme - Sahila Beegum - Beata Jaworska-Szulc - Małgorzata Pruszkowska-Caceres - Wioletta Gorczewska-Langner - Rafael Angulo-Jaramillo - Diederik Jacques
Detaily:
Rok, strany: 2018, 246 - 256
Kľúčové slová:
Groundwater recharge; Freshwater lenses; HYDRUS; SWI2; MODFLOW; Vadose zone.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
The paper presents an evaluation of the combined use of the HYDRUS and SWI2 packages for MODFLOW
as a potential tool for modeling recharge in coastal aquifers subject to saltwater intrusion. The HYDRUS package for
MODFLOW solves numerically the one-dimensional form of the Richards equation describing water flow in variablysaturated
media. The code computes groundwater recharge to or capillary rise from the groundwater table while
considering weather, vegetation, and soil hydraulic property data. The SWI2 package represents in a simplified way
variable-density flow associated with saltwater intrusion in coastal aquifers. Combining these two packages within the
MODFLOW framework provides a more accurate description of vadose zone processes in subsurface systems with
shallow aquifers, which strongly depend upon infiltration. The two packages were applied to a two-dimensional problem
of recharge of a freshwater lens in a sandy peninsula, which is a typical geomorphologic form along the Baltic and the
North Sea coasts, among other places. Results highlighted the sensitivity of calculated recharge rates to the temporal
resolution of weather data. Using daily values of precipitation and potential evapotranspiration produced average
recharge rates more than 20% larger than those obtained with weekly or monthly averaged weather data, leading to
different trends in the evolution of freshwater-saltwater interfaces. Root water uptake significantly influenced both the
recharge rate and the position of the freshwater-saltwater interface. The results were less sensitive to changes in soil
hydraulic parameters, which in our study were found to affect average yearly recharge rates by up to 13%.
Ako citovať:
ISO 690:
Szymkiewicz, A., Gumuła-Kawęcka, A., Šimůnek, J., Leterme, B., Beegum, S., Jaworska-Szulc, B., Pruszkowska-Caceres, M., Gorczewska-Langner, W., Angulo-Jaramillo, R., Jacques, D. 2018. Simulations of freshwater lens recharge and salt/freshwater interfaces using
the HYDRUS and SWI2 packages for MODFLOW. In Journal of Hydrology and Hydromechanics, vol. 66, no.2, pp. 246-256. 0042-790X (until 2019) .
APA:
Szymkiewicz, A., Gumuła-Kawęcka, A., Šimůnek, J., Leterme, B., Beegum, S., Jaworska-Szulc, B., Pruszkowska-Caceres, M., Gorczewska-Langner, W., Angulo-Jaramillo, R., Jacques, D. (2018). Simulations of freshwater lens recharge and salt/freshwater interfaces using
the HYDRUS and SWI2 packages for MODFLOW. Journal of Hydrology and Hydromechanics, 66(2), 246-256. 0042-790X (until 2019) .