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Wyznaczanie punktów monitoringu badawczego wód podziemnych na podstawie czasu wymiany wód w zlewniach objętych badaniami modelowymi

Michalczyk T., Bar-Michalczyk D.

Przegląd Geologiczny

2015

Vol. 63, nr 10/2

931--934

Design of groundwater monitoring programs in catchments subjected to detailed studies should be based on the knowledge of the directions and time scales of groundwater flow. Mathematical hydrodynamic models have an undying popularity both in the context of the quantitative assessment and predictions of contaminants migration. A properly designed hydrodynamic model can also be a useful tool for designing of monitoring networks. The authors present the application of such a possibility on an example of the model of a part of Main Groundwater Basin 326 (GZWP 326) in the Kocinka catchment. Studied area is one of research sites in the Soil2Sea project implemented under the BONUS program for the Baltic Sea catchment area. Goal of the project is to determine the intensity and timescales of retention and natural attenuation of biogens in the stream part of the river. Time scales of groundwater exchange and their directions were investigated using Visual MODFLOW and MODPATH packages. This approach allowed to identify parts of the catchment where a more detailed research will be performed at the selected groundwater investigativemonitoring sites.

Numeryczny model filtracji i transportu masy w wodach podziemnych rejonu składowiska odpadów w Jelczu-Laskowicach

Gurwin Jacek

Geologos

2006

Vol. 10

75--90

The investigations were conducted to establish an influence of the waste disposal in Jelcz-Laskowice on groundwater. The measurements in the local monitoring network coinciding with other field work let to develop a conceptual model of local groundwater flow system. The next crucial step was to create a numerical model using finite difference MODFLOW solution basing on conceptual model setup in a GMS modelling environment. As a major result after calibration a proper hydrodynamic field in a three-dimensional space was calculated. Afterwards using MODPATH code the pathlines were obtained and the time of advective transport of particles from a waste disposal area to the river was estimated as 90-130 years with average velocity equalling 6,6-8,6 m/a. The final task was creating a transport model in MT3D environment to simulate chlorides plume migration, achieving in the period of 30 years a good fit between observed and calculated concentrations.