which of the following is the danger of saltwater intrusion the greatest
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Saltwater intrusion is generally greatest in "D)coastal freshwater supplies" since many fresh water bodies are connection to the oceans, which are salt water bodies.
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Saltwater intrusion is the highest in Coastal Freshwater Supplies
Option (d)
EXPLANATION:
- Saltwater intrusion is the passage of saline/salty water from seas into freshwater aquifers (groundwater/freshwater) that result in the drinking water sources being contaminated and other concerns. Saltwater intrusion comes naturally to certain extent in coastal aquifers, because of the hydraulic link between seawater and groundwater.
- Since saline water has a greater mineral content than freshwater, it is thicker and has greater water pressure. Consequently, saltwater can thrust inland below the freshwater. Particular human activities, specifically pumping of groundwater from wells with coastal freshwater have augmented saltwater intrusion in several coastal areas.
- Water extraction decreases the fresh groundwater level, thereby decreasing its water pressure and letting salt water to move further inland. Other contributors to saltwater intrusion comprise drainage channels and agricultural or navigation channels that provide channels for saltwater to stream inland. Rise in the sea level rise also contributes to saltwater intrusion and saltwater intrusion could get worse by extreme occurrences events such as hurricanes
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