All Flashcards
Effect of urban runoff on aquatic life?
Contamination of water bodies, harming/killing organisms.
Cause of Southern California beach closures after rain?
High levels of pollutants in urban runoff.
Effect of increased runoff volume/velocity?
Soil erosion and flooding in urban/downstream areas.
What causes decreased groundwater levels in urban areas?
Impervious surfaces prevent water infiltration.
Impact of impervious surfaces on groundwater?
Reduced groundwater recharge due to prevention of water seeping into the ground.
How does runoff impact marine systems?
Increased freshwater and pollutant input, disrupting balance.
Role of runoff in water pollution?
Runoff picks up pollutants and transports them to water bodies.
Why is water infiltration important?
Mimics natural processes, replenishing groundwater.
Explain the 'sponge vs. plate' analogy.
Sponge (natural) absorbs, plate (urban) causes runoff.
How does urbanization affect water cycles?
Increases runoff, reduces infiltration, alters flow patterns.
What is urban runoff?
Water from rain/snow flowing over man-made surfaces.
Define impervious surfaces.
Surfaces that prevent water infiltration (e.g., roads).
What is permeable pavement?
Pavement that allows water to seep through.
What are green roofs?
Vegetation planted on rooftops to absorb rainwater.
What are rain gardens?
Depressions planted to collect and filter runoff.