Table 2. A future scenario for brownification, increasing water color due to increasing levels of DOC in surface water, in the River Helge å catchment based on four drivers of change.
| |
| |
|
Driver of change |
Mechanism for contribution to
brownification |
Future contribution to brownification (as
increase, stable, decrease) in the medium term (2050) |
Scale and type of
intervention |
| |
|
Climate change (1) |
increase leaching of DOC through 100-year
flows “much more often” and through increased soil
temperatures. |
+increase
in coming decades |
Global agreements and regional actions.
Measures to slow down water flow in the upper parts of the watershed
|
|
Reversed acidification (2) |
increase leaching of DOC through decreasing
deposition |
+ to
0increase in next decade then
level out |
- |
|
Land cover change (3) |
increase stock of DOC through increased
forest cover and increased coniferous forest cover |
+ to
-stable/increase in coming decades
than possibly decrease |
Regional. Measures to slow down water flow
in the upper parts of the watershed |
|
Drainage of land (4) |
increase leaching of DOC through increased
run-off,increase stock of DOC
through increased decomposition |
+stable/increase
in coming decades |
Regional. Measures to slow down water flow
in the upper parts of the watershed |
|
| |
|