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Agricultural activity
6. Clear cutting
                                       Impacts
         Surface water                                  Groundwater
Erosion of land, leading to high
levels of turbidity in rivers, siltation
of bottom habitat, etc. Disruption
and change of hydrologic regime,
often with loss of perennial streams;
causes public health problems
due to loss of potable water.
Disruption of hydrologic regime,
often with increased surface runoff
and decreased groundwater
recharge; affects surface water by
decreasing flow in dry periods and
concentrating nutrients and
contaminants in surface water.