Application of the Integrated Water Management Approach
227
Fe (X)=_l_(r+e+)
/0/
h . 0"
/0/0
)
This equation represents the analytical solution of the one-dimensional steady
transport considering the relevant transformation processes. The coefficient a describes the rate of sedimentation, which depends on water temperature, the concentration of DO and the pH value. Resuspension of iron due to erosion, described
by the coefficient 6, depends on the critical shear stress. Critical shear stress as
well as erosion parameters were determined by in-situ investigations at different
river sections (see above). Resolution caused by a change of environmental,
chemical conditions is described by the coefficient r, which depends on water
temperature, the concentration of DO and the pH value.
The basic Eq. 2 has to be enhanced to consider point and non-point sideflows.
After calibration and verification of the enhanced equation it is coupled to the water balance model ArcGRM. Calibration and verification as well as implementation of the quality module into ArcGRM, are in progress presently Veenker 200 I ).
9 Application of the Spree Model and Conclusion
The Integrated Water Recourses Management (IWRM) and the European Water
Framework Directive (WFD) are internationally accepted approaches to water
management in river catchment areas. Although a variety of tools to achieve these
aims have been developed already, none of them could meet the requirements of
the situation of the River Spree.
The catchment area of the River Spree can be described in three sections. The
first is the Lusatian lignite-mining district. Here, for decades, the groundwater was
lowered for the gaining of brown coal in open pits. As a consequence not only the
whole water regime has been changed, but also chemical and biological changes
have occurred, which today, in times of filling the open pits with water, lead to a
complex net of problems. Also the other two sections of the River Spree, a biosphere reservation called the Spree Forest and the Lower Spree, are heavily influenced by the situation in the upper river.
This research project will be implemented for the water management of the
River Spree. Here, all compartments such as groundwater, surface water, but also
rainfall and runoff, are being researched in order to build a prediction model,
which will help to find the optimum way of water management.
The extensive data acquisition and assemblage of knowledge about the chemical, biological, hydraulic and hydrological situation serve as a basis to develop an
integrated water - quantity and water - quality management model which can, in
part or in total, also be adopted to other catchment areas. The collected knowledge
will be documented in a variety of communication avenues. Besides publications
of the individual project partners, the joint task has implemented internet informa-
227
Fe (X)=_l_(r+e+)
/0/
h . 0"
/0/0
)
This equation represents the analytical solution of the one-dimensional steady
transport considering the relevant transformation processes. The coefficient a describes the rate of sedimentation, which depends on water temperature, the concentration of DO and the pH value. Resuspension of iron due to erosion, described
by the coefficient 6, depends on the critical shear stress. Critical shear stress as
well as erosion parameters were determined by in-situ investigations at different
river sections (see above). Resolution caused by a change of environmental,
chemical conditions is described by the coefficient r, which depends on water
temperature, the concentration of DO and the pH value.
The basic Eq. 2 has to be enhanced to consider point and non-point sideflows.
After calibration and verification of the enhanced equation it is coupled to the water balance model ArcGRM. Calibration and verification as well as implementation of the quality module into ArcGRM, are in progress presently Veenker 200 I ).
9 Application of the Spree Model and Conclusion
The Integrated Water Recourses Management (IWRM) and the European Water
Framework Directive (WFD) are internationally accepted approaches to water
management in river catchment areas. Although a variety of tools to achieve these
aims have been developed already, none of them could meet the requirements of
the situation of the River Spree.
The catchment area of the River Spree can be described in three sections. The
first is the Lusatian lignite-mining district. Here, for decades, the groundwater was
lowered for the gaining of brown coal in open pits. As a consequence not only the
whole water regime has been changed, but also chemical and biological changes
have occurred, which today, in times of filling the open pits with water, lead to a
complex net of problems. Also the other two sections of the River Spree, a biosphere reservation called the Spree Forest and the Lower Spree, are heavily influenced by the situation in the upper river.
This research project will be implemented for the water management of the
River Spree. Here, all compartments such as groundwater, surface water, but also
rainfall and runoff, are being researched in order to build a prediction model,
which will help to find the optimum way of water management.
The extensive data acquisition and assemblage of knowledge about the chemical, biological, hydraulic and hydrological situation serve as a basis to develop an
integrated water - quantity and water - quality management model which can, in
part or in total, also be adopted to other catchment areas. The collected knowledge
will be documented in a variety of communication avenues. Besides publications
of the individual project partners, the joint task has implemented internet informa-