Final answer:
Impervious surface cover refers to surfaces that do not absorb water, leading to increased runoff and decreased groundwater recharge. It impacts the hydrologic cycle by increasing runoff, reducing infiltration, and altering water quality.
Step-by-step explanation:
Impervious Surface Cover:
Impervious surface cover refers to any surface that does not absorb or allow water to infiltrate into the ground. Examples of impervious surfaces include roads, parking lots, and buildings. These surfaces prevent rainwater from seeping into the soil, leading to increased runoff and decreased groundwater recharge.
Effects on the Hydrologic Cycle:
Impervious surfaces can significantly impact the hydrologic cycle. Here are some ways:
- Increased runoff: Impervious surfaces cause rainwater to flow over the surface rather than being absorbed into the ground. This increases the volume and velocity of runoff, leading to more erosion and flooding.
- Reduced infiltration: With less water infiltrating the ground, there is less recharge of groundwater, which can lead to lower water tables and decreased availability of freshwater.
- Altered water quality: Runoff from impervious surfaces can carry pollutants, such as oil, pesticides, and heavy metals, into nearby water bodies. This can degrade water quality and harm aquatic ecosystems.