Development of coupled hydrological-biogeochemical models of

materials transport at the landscape scale

John Melack

Key participants: John Melack and Ed Beighley,

As an introduction, the discussion at the previous ASM was summarized, and the floor was then opened for information on new developments in coupled hydrological-biogeochemical modeling.  Only limited comments were made.

As a further means of stimulating discussion, Ed Beighley presented the development and results from a hydrological model designed for flashy catchments, such as those in regions with Mediterranean-type climates.

The discussion turned to the potential of developing a data base system similar to ClimDB and HydroDB for hydrochemical data.  Although comments were generally positive, issues associated with differences in sampling frequency and types of analyses were raised.

Two actions evolved from the discussions:

1: Walter Dodds prepared a proposal for further examination of cross-site activities related to solute transport in streams that combined discussions at this and two other working groups.  2:A workshop is being planned for September 2004.

Doug Ryan has furthered work on the development of a HydroChemDB. A conference call was held, some funding has been procured and metadata standards are being formulated.