| title: | Basinwide groundwater flow and the hydrogeological parameters for implementation of EC Water Framework Directive in Estonia |
|---|---|
| reg no: | ETF6118 |
| project type: | Estonian Science Foundation research grant |
| status: | accepted |
| institution: | Institute of Geology at Tallinn Technical University |
| head of project: | Leo Vallner |
| duration: | 01.01.2005 - 31.12.2007 |
| description: | Goal of the project is to reconstruct the natural geohydrodynamic background and on the basis of the latter to determine the hydrogeological parameters needed for the implementation of EC Water Framework Directive in Estonia. The main tool of the project is the digital hydrogeological model of Estonia. By switching off all groundwater intakes and mine dewatering areas the predevelopment conditions will be restored in the model. By modelling the vector field of basinwide groundwater flow will be calculated, and maps showing the pathways, velocity and rates of groundwater flow will be compiled. On this basis the water bearing system will be divided into budget units and the natural groundwater budget will be compiled. The volume of inflow into budgets unit is considered as their natural resource. The transversal and lateral conductivities of aquitards will be calculated. The time needed for water exchange in budget units will be determined. The bodies of groundwater distinguished in accordance with WFD will be delimited in the model. The inflow of groundwater into groundwater bodies in natural conditions will be calculated, from which direct outflow into surface water bodies will be subtracted (if such flows occur). In such way the available groundwater resource will be determined, which must not be exceeded by abstraction. The pathways and velocity of the movement of contaminated or naturally poor-quality water under natural and man-made conditions will be identified. The impact of intrusions will be assessed on groundwater quality. Main scientific outcome of the project will be that for the first time the natural geohydrodynamic background of the water bearing system of Estonia will be reconstructed and profoundly characterised. For the EC water policy is essential the information get on scientific basis for estimation of the groundwater state. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Leo Vallner | Institute of Geology at Tallinn Technical University | Researcher | |