In areas that have become urbanized,the percolation of rainwaters tends to decrease and the speed at which rainwaters flow into streams and rivers tends to increase.Which of the following would be good ways to counteract this effect?
A) Dig drainage ditches to the streams and rivers, for rainwaters to flow through quickly.
B) Dig out shallow areas for rainwater runoff to collect into, to allow slow percolation into soils.
C) Increase the carrying capacity of storm water sewer systems.
D) Both A and C

Question

Quizplus · Accepted Answer

Digging out shallow areas for rainwater runoff to collect into allows for slower percolation into soils and also helps to mitigate flash flooding. This method promotes natural infiltration and decreases the runoff flow rate, which can help to reduce the amount of polluted water from entering rivers or streams. Digging ditches and increasing the carrying capacity of storm water sewer systems can lead to faster and larger volumes of water entering streams and rivers and may exacerbate the problem.

In Areas That Have Become Urbanized,the Percolation of Rainwaters Tends