What are the most effective ecosystem-based methods for wetland recovery and flood control?
What are the most effective ecosystem-based methods for wetland recovery and flood control?
Read lessCorrect Answer: All three Explanation: Gold mining activity is a source of mercury pollution in the world: Correct. Artisanal and small-scale gold mining (ASGM) is one of the largest global sources of mercury emissions. Mercury is used in the extraction process to amalgamate gold, releasing significRead more
Correct Answer: All three
Explanation:
- Gold mining activity is a source of mercury pollution in the world:
Correct. Artisanal and small-scale gold mining (ASGM) is one of the largest global sources of mercury emissions. Mercury is used in the extraction process to amalgamate gold, releasing significant amounts of mercury into the environment. - Coal-based thermal power plants cause mercury pollution:
Correct. Coal contains trace amounts of mercury. When coal is burned in thermal power plants, mercury is released into the atmosphere as a pollutant. - There is no known safe level of exposure to mercury:
Correct. Mercury is highly toxic, and even low levels of exposure can lead to serious health effects. The World Health Organization (WHO) states that there is no safe threshold for mercury exposure, particularly for vulnerable groups such as pregnant women and children.
Hence, all three statements are correct.
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The best nature-based solutions (NbS) for restoring wetlands and preventing floods work by mimicking or enhancing natural processes to improve water management, biodiversity, and resilience to climate impacts. Here are the most effective strategies: 🌿 1. Wetland Restoration and Reconnection What itRead more
The best nature-based solutions (NbS) for restoring wetlands and preventing floods work by mimicking or enhancing natural processes to improve water management, biodiversity, and resilience to climate impacts. Here are the most effective strategies:
🌿 1. Wetland Restoration and Reconnection
What it is: Rehabilitating degraded wetlands by reintroducing native vegetation, removing invasive species, and reconnecting wetlands to rivers and floodplains.
Benefits: Restores the wetland’s natural ability to absorb and slow floodwaters, filter pollutants, and support wildlife.
🌊 2. Floodplain Reconnection
What it is: Allowing rivers to overflow into their natural floodplains by removing levees or modifying embankments.
Benefits: Reduces flood peaks downstream, replenishes groundwater, and improves habitat quality.
🌱 3. Reforestation and Riparian Buffer Zones
What it is: Planting native trees and vegetation along rivers and streams.
Benefits: Stabilizes soil, reduces erosion, slows runoff, and enhances water infiltration, reducing the severity of floods.
🐟 4. Restoring Natural Hydrology
What it is: Removing drainage systems, dams, or other artificial barriers that alter water flow.
Benefits: Restores natural water cycles, increases water retention in landscapes, and supports wetland function.
🌾 5. Constructed Wetlands and Retention Basins
What it is: Creating man-made wetlands designed to mimic natural ones for water storage and filtration.
Benefits: Helps manage stormwater, reduces urban flooding, and treats runoff before it enters natural water bodies.
🌬️ 6. Coastal Wetland and Mangrove Restoration (for coastal areas)
What it is: Replanting and protecting salt marshes or mangroves.
Benefits: Acts as a buffer against storm surges, reduces coastal flooding, and supports marine biodiversity.
✅ Summary of Benefits:
Flood regulation through water storage and slowed runoff
Water purification by filtering sediments and pollutants
Carbon sequestration and climate resilience
Biodiversity support and improved habitat quality
See lessThese solutions are most effective when integrated into broader land and water management policies, supported by community involvement, and tailored to local ecosystems.