Modeling acidification and recover in the roofed catchment at Lake Gårdsjön

✍ Scribed by Harald Sverdrup; Per Warfvinge; Hans Hultberg; Filip Moldan

• Publisher: Springer Netherlands
• Year: 1995
• Tongue: English
• Weight: 335 KB
• Volume: 85
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00477233

✦ Synopsis

The dynamic, biogeochemical model SAFE was applied to a roofed subcatchment G1 at Gs Sweden. The roof was installed in 1991, and deposition of anthropogenic S and N reduced by ca. 90%. Initiated from pre industrial steady-state conditions, SAFE predicts present levels of biologically relevant chemical properties (pH, inorganic A1 and base cations). SAFE overestimates the short-term effects of the manipulation on runoff pH, while the modeled decline in inorganic A1 and and base cations are comparable to observations. Temporal variability and too few years of measured data make model to data comparison difficult. Sulfate desorption, which is not included in SAFE, may introduce a time lag between modeled and measured data. Reductions of S and N inputs by 90% will lead to a recovery in pH, low A1 but extremely low base cations concentrations due to replenishment of exchange sites.