1) Establish novel procedure for in-situ BDOC determination as a portable measuring system and its application for the assessment of RBF sites. 2) Comparison between old measurement data from testfilter experiments with Elbe River water and recently observed DOC degradation in Elbe River water and identification of climate change impact on the behavior of DOC. 3) Description of the transport behavior of selected

compounds /elements during RBF, based on a determination of dispersion coefficients, degradation coefficients, and retardation factors.4) Simulation of flow condition in HCW s, evaluation of adväntages and disadvantages of lateral designs for RBF schemes: 5) Assessment of the effect of the design of abstraction schemes and related hydraulic parameters, initial and boundary conditions on flow and transport behavior during RBF, and climate changes under RBF conditions.