Department of Aquatic Sciences and Assessment, Division of Geochemistry and Hydrology
Technical Calculation System Water (TBV) was developed within the consortium SMED to support Sweden's reporting to HELCOM and follow up the national environmental objective zero eutrophication.
With TBV estimated load from land to the sea was calculated as well as the source apportionment of nitrogen and phosphorus. In addition to load calculations TBV also store and manage a large amount of data.
TBV was used to compile Sweden's data for reporting to HELCOM under the Pollution Load Compilation (PLC). Apart from the PLC calculations, TBV was also used for calculations to follow-up the Swedish environmental target "Zero Eutrophication".
From PLC8 is not TBV used anymore. The loads are instead calculated by the HYPE model and made available through Vattenwebb (in Swedish).
Some of the input data and results in terms of gross and net load to sea are available at SMED Vatten's web page (in Swedish):