RUNOFFS. BY: Mosammat Taher. WHAT IS A RUNOFF ?. A run off is when water flows over land areas mixing with soil, minerals, and other contents, finally draining at a point. Naturally, this point should be a channel such as rivers and lakes These kind of points are known as nonpoint sources.
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A run off is when water flows over land areas mixing with soil, minerals, and other contents, finally draining at a point.
Naturally, this point should be a channel such as rivers and lakes
These kind of points are known as nonpoint sources
Going over these surfaces, the water can be absorbed by the soil and ground, which is an important aspect of the water cycle
Unfortunately, the surfaces for this water to flow over are not the best because the water has to go over man made materials. When it rains or snow melts, the water goes over: Roads, pavements, buildings, rooftops
Problem: the water that is supposed to be absorbed by the soil (which is known as aquifer) cannot do that; interrupting the water cycle
As the water flows over these surfaces, it gets pretty dirty and contaminated by the chemicals founds on these places: Pesticides, fertilizers, Oil, Dirt, Rubber, Garbage like plastic bags and bottles
Problem: Since this water ends up somewhere like a river , all these contaminants are now put into these major water sources
This is known as nonpoint source pollution
Drinking water supplies can be contaminated by polluted runoff. Humans who come in contact with polluted water and fish can experience harmful symptomsor even die.
by GreenTreks Network