ltbp.org | Programmes | Sedimentation | Lake Circulation Model

ltbp.org : programmes : sedimentation: lake circulation model


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Appendix 1 of the IAA also described in further detail the key component of the linkage between the hydrology programme and the GEF Lake Tanganyika Biodiversity Project (LTBP). This included the development of the water-circulation model with more detail on the methodologies to be adopted.

The initial response from LTBP to the draft work programme cast some doubt on the overall aim of the lake circulation model noting that "a model that does not accurately reflect true local circulation with sufficiently high resolution, or is restricted in the range of parameters it can cope with, would have limited value in the medium to long term horizon of the GEF project purpose".

To address this G. Patterson the technical co-ordinator of the LTBP met with the principal investigators in this project in order to try to harmonise objectives of the Lake Circulation work with that of LTBP. This involved meetings with one of the key active scientists on this project, Victor Podschetine, on 28/5/96, and a visit to Finland on 3-4 October 1996 to discuss with both the scientists involved (V. Podschetine and T. Huttula) and the key Finnish staff from the University of Kuopio responsible for the execution of the programme.

The principal elements requested of the lake circulation work by LTBP, to more closely complement the other special studies of LTBP already established in the project Inception Report (from the Project Inception Meeting of March 1996), can be summarised as:

That the model emphasise understanding of high resolution circulation patterns in the inshore regions particularly adjacent to river mouths
That the model develop understanding of suspended sediment movements from point sources (rivers mouths)
That the model consider the horizontal and vertical movement of deoxygenated water (specifically to understand whether incursions of deoxygenated water into shallow littoral areas occurs)
That the Lake Circulation work considers carrying out a geochemical tracer study of Lake Tanganyika to verify vertical circulation rates. It was suggested that this work could be co-ordinated by R Weiss of the Scripps Institute of Oceanography and some details of the methodologies and the costs were provided to Timo Huttula.

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