Environmental
What is 'stormwater management' and why is it required for large Idaho development projects?
AManaging water supply for residential irrigation
BControlling runoff from developed sites to prevent flooding, erosion, and water quality degradation, required under federal NPDES permits and local Idaho ordinances✓ Correct
CManaging Idaho's river flow rates
DTreating municipal water for drinking purposes
Explanation
Stormwater management controls the quantity and quality of runoff from developed sites. Impervious surfaces (roofs, pavement) increase runoff volume and speed, carrying pollutants to waterways. Idaho NPDES construction permits require Stormwater Pollution Prevention Plans (SWPPPs) for sites over 1 acre. Post-construction stormwater management (retention ponds, bioswales) is required for many Idaho developments.
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