Susquehanna–Chesapeake Basin Quiz
Chesapeake inputs, land use, water quality (10 questions).
Susquehanna–Chesapeake Basin Quiz: Quick Study Notes
The Susquehanna–Chesapeake Basin is a vital ecosystem, but its health is significantly influenced by human activities within its vast watershed. This quiz focuses on understanding the primary inputs, land use impacts, and critical water quality issues facing this iconic estuary.
Key Concepts
The Susquehanna River is the largest freshwater source, delivering nutrients and sediment from its vast watershed. Other major rivers include the Potomac, James, and York.
Nitrogen and phosphorus, primarily from agricultural runoff, wastewater, and atmospheric deposition, fuel excessive algal growth (eutrophication).
Agriculture and urban development contribute significantly to pollution through fertilizer runoff, animal waste, and stormwater from impervious surfaces.
Eutrophication leads to algal blooms, hypoxia (dead zones), and reduced water clarity due to sediment, impacting submerged aquatic vegetation and marine life.
Key Takeaways
- The Susquehanna River is the largest contributor of freshwater to the Chesapeake Bay.
- Nitrogen and phosphorus are key pollutants causing eutrophication.
- Agricultural runoff is a major source of nutrient and sediment pollution in the basin.
- Impervious surfaces from urban development increase stormwater runoff and pollutant delivery.
- Eutrophication leads to “dead zones” characterized by critically low dissolved oxygen.
- Riparian buffers are crucial for filtering pollutants and stabilizing stream banks.
- The Chesapeake Bay Program leads multi-state restoration efforts for the watershed.
Frequently Asked Questions
What are the main sources of pollution in the Susquehanna–Chesapeake Basin?
The main sources include agricultural runoff (nitrogen, phosphorus, sediment), urban and suburban stormwater runoff, wastewater treatment plant discharges, and atmospheric deposition.
How does land use impact the water quality of the Chesapeake Bay?
Intensive agricultural practices lead to nutrient and sediment runoff. Urbanization increases impervious surfaces, leading to higher stormwater runoff that carries pollutants directly into waterways. Forest loss also reduces natural filtration.
What is eutrophication, and why is it a problem in the Bay?
Eutrophication is the excessive richness of nutrients in a body of water, leading to a dense growth of plant life and death of animal life from lack of oxygen. In the Bay, it causes algal blooms, which then decompose and deplete dissolved oxygen, creating ‘dead zones’ harmful to marine life.
What are ‘dead zones’ in the Chesapeake Bay?
Dead zones are areas of the Bay, typically in deeper waters during warmer months, that have very low or no dissolved oxygen (hypoxia or anoxia). These conditions are caused by the decomposition of excessive algal blooms resulting from nutrient pollution, making it difficult for fish, crabs, and oysters to survive.
What efforts are being made to restore the Chesapeake Bay?
Restoration efforts are coordinated by the Chesapeake Bay Program, a federal-state partnership. Initiatives include reducing nutrient and sediment runoff from agriculture and urban areas, restoring oyster populations, protecting critical habitats like wetlands and forests, and improving wastewater treatment.
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