What is the effect of the soil composition on the filtration rate of water?Discuss

Overall Topic- Soil
Specific Research Question- What is the effect of the soil composition on the filtration rate of water?
Proposed Procedure (general)- Get a bucket of water and different types of soil and see how long it takes to filter the water
You have to collect your own data but you can make up some numbers
I have to tie this into an important environmental issue
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