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    Royal Society for the Protection of Birds - The River South Esk
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    Runoff is a problem because:
    epa.gov+4
    • It picks up pollutants such as fertilizer, oil, pesticides, dirt, bacteria, and other harmful substances as it flows into streams, rivers, lakes, and the ocean.
    • It is a major source of water pollution.
    • It can carry sewage and medical waste to beaches after heavy rainfall.
    • It can deposit harmful pollutants like trash, chemicals, and sediment into water bodies.
    • It can lead to excessive growth of algae and aquatic plants, degrading water quality and interfering with recreation.
    • In developed areas, impermeable surfaces prevent water from soaking into the ground, resulting in increased runoff, which can cause floods, erosion, and water pollution.

    5 Sources

    Soak Up the Rain: What's the Problem? | US EPA - U.S. Environmental ...
    Runoff picks up fertilizer, oil, pesticides, dirt, bacteria and other pollutants as it makes its way through storm drains and ditches - untreated - to our streams, rivers, lakes an…
    U.S. Environmental Protection Agency
    https://www.epa.gov/soakuptherain/soak-rain-whats-problem
    Runoff - National Geographic Society
    Runoff is a major source of water pollution. As the water runs along a surface, it picks up litter, petroleum, chemicals, fertilizers, and other toxic substances. From California t…
    National Geographic Society
    https://education.nationalgeographic.org/resource/runoff/
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    Urbanization and Stormwater Runoff | US EPA - U.S. Environmental ...
    Stormwater runoff is generated from rain and snowmelt that flows over land or impervious surfaces, such as paved streets, parking lots, and building rooftops, and does not soak int…
    U.S. Environmental Protection Agency
    https://www.epa.gov/sourcewaterprotection/urbanization-and-stormwater-runoff
    Why is Storm Water Runoff a Problem? - Wisconsin DNR
    Runoff from both urban and rural areas contains nutrients such as phosphorus and nitrogen. Phosphorus, often carried in with the sediment, fuels the growth of algae and aquatic wee…
    Wisconsin.gov
    https://dnr.wisconsin.gov/topic/Stormwater/learn_more/problems.html
    What is Runoff? - Asia Climate Lab
    As can be seen from Figure 1 below, runoff generated in developed areas is significantly higher compared to the pre-developed areas. This is due to impermeable surface that keeps w…
    asiaclimatelab.com
    https://asiaclimatelab.com/resources/what-is-runoff/
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    nationalgeographic.org
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    wisconsin.gov
    asiaclimatelab.com
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