more information will come
Field measurements close to Trondheim will be carried out.
The objective is to varify a new developed method to identify the human causes for bed level changes - especially erosion- in rivers over time (test cases should be used) In this new method the EXNER equation was combined with the EINSTEIN-SHEN concept and a new framework was developed. With the combination of the EXNER equation and the EINSTEIN-SHEN concept an integration of human impact is possible. One must consider specific river sections to identify the changes in bed levels there. Important is a well-founded choice of sections for which the human impacts are known. An exact knowledge of the human impact on the section is needed over time to compare the results for different time steps. In addition one must know the transport rate over volume length, as well as the porosity to identify the bed level changes over time. A determination of transport rate is possible with a large number of formulae if transport rate equals to transport capacity, which is the case for bed-material load and relevant for the new framework. Bed-material load is defined as sediment affecting the river bed. Changes in bed-material load through external factors like dredging and tributaries are equally relevant. In this way the new method can be used to identify the correlations between bed level changes and the specific human impact. The method is highly dependent on the given database. An extensive discussion should show the restrictions of the method and propose different ways if relevant data is not available.
Figure 1: Elbe River