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THE GROUNDWATER
GROUP
Grundvandsgruppen
Det Strategiske Miljøforskningsprogram
The Danish Environmental Research
Program |
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Pesticides and Groundwater, Final Report, 1996-1999
Download entire report
Pesticides and Groundwater, Annual Report 1998 (download pdf-file)
Background.
The objectives of the Centre.
Expected results.
Contents of the
subprojects.
Participating
institutions, co-operation, centre council and centre management.
Scientific contact and further information.
Conceptual design of the research programme "Pesticides and Groundwater",
comprising laboratory experiments, field studies and regional modelling.
The objectives of the
Centre.
The activities of the Groundwater Group in relation
to the issue "Pesticides and Groundwater" are aimed at developing the existing
very limited knowledge of the physical, chemical
and microbiological conditions and processes that determine the sorption,
degradation and transport of pesticides, both in the strata above the
groundwater level and in the aquifers. Further, based
on the results of laboratory and field studies, efforts are being made
to develop models for determining the migration of pesticides in large
run-off and take-in areas where the structure and properties of the strata
can vary a great deal. The Centre activities have been subdivided into
three projects reflecting these overall objectives:
The specific objectives of Project 1, which
deals with the strata above the groundwater level, are:
-
To develop methods for characterising pressure conditions
and the water movement pattern in heterogenous strata, including investigations
on
-
the influence of fractures and macropores on the
hydraulic conditions
-
To evaluate the dependence of pesticide and metabolite
transport on the distribution of precipitation, methods of cultivation,
choice of crops,
-
etc.
-
To identify sorption and degradation mechanisms which
influence pesticide transport in soils
-
To develop models to predict pesticide transport.
In Project 2, which addresses aquifers,
the specific objectives are:
-
To identify sorption mechanisms which influence
pesticide transport in aquifers
-
To investigate the degradation potential of
pesticides in different aquifers
-
To identify and describe mechanisms which
limit pesticide degradation in groundwater
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To investigate the capacity of wetland areas
to sorb and degrade pesticides.
Lastly, in Project 3, which addresses
operational modelling of pesticide transport in large areas, the specific
objectives are:
-
To develop and test methods for regional up-scaling
of results from small-scale laboratory and field tests
-
To develop regional models which, as far as
possible, cover pesticide transport and migration as well as pesticide
sorption and degradation in
-
the root zone, the unsaturated zone and in
aquifers
-
To test regional models in two large areas,
including the consideration of the utilization of the areas
-
To evaluate seepage and vulnerability conditions
based on different models (deterministic as well as stochastic).
Scientific contact person
Jens Aamand, Ph.D, Senior Scientist, GEUS.
E-mail: jeaa@geus.dk
Additional information
Arne Dinesen, Chief Geologist, GEUS, Øster Voldgade 10, DK-1350 Copenhagen K.
Tel.: +45
38142000 - Fax: +45 38142050 - e-mail: ad@geus.dk.
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