How can a flood cause polluted surface water?

Expert Answers
gsenviro eNotes educator| Certified Educator

Flood is typically an event of very high discharge in a body of water and along with it comes the high momentum that causes destruction and is capable of carrying a lot of sediment and other floating material. The flooding will lead to inundation of flood plains, geographical regions through which the flood water flows, and because of the momentum, soil erosion will take place. These eroded particles will be floating in the flood water. When the flood water enters a river plain or mixes with other surface water bodies (e.g., rivers, ponds, lakes, reservoirs, oceans, etc.), the eroded particles will be deposited in the surface water, leading to its pollution. Floods also pick up material during their destructive flows, which can include debris, plants/trees, bodies, fertilizers/pesticides from agricultural fields, etc. All these contaminants will be mixed with the surface water, thus causing its pollution.

udonbutterfly | Student

Floods are seriously horrible things. Floods have the ability to pick to deposit from dirt or work sites that may have chemicals in them that come from the process construction or soap that is embedded in the dirt after a carwash. Due to high rising levels at quick speeds it can not be controlled and thus the deposit taints surface water.

soquee | Student

flood  refer to discharge of water from water sources which in ground surface this can cause as water can do transport activities so this can facilitate the transportation of many materials from one place to another in which due to this it direct cause pollution to surface water

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