Managing Runoff and Stormwater Drainage Quiz

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Why does low-lying ground or ground with little slope increase the infiltration of water?

Because it prevents water from entering the soil

Because it prevents water from seeping down along roots

Because it keeps water in contact with the dirt longer, allowing more time to permeate (correct)

Because it allows water to collect between tightly packed grains

How does vegetation contribute to increasing the infiltration rate?

By allowing water to seep down along roots and creating air space in decaying organic matter (correct)

By creating impermeable air spaces in the soil

By promoting the tight packing of soil grains

By blocking water from seeping down along roots

What is a characteristic of limestone that enhances its permeability?

It is impermeable due to its structure

It allows water to pass through it fairly well (correct)

It has high porosity without air spaces

It has low porosity and low permeability

Why does sand facilitate easy infiltration of water?

Because individual grains of sand do not pack tightly, leaving lots of interconnected air space Signup and view all the answers

How does clay's high porosity affect its permeability?

It causes low permeability as the air spaces created do not readily connect Signup and view all the answers

Why does rain falling slowly enhance infiltration into the soil?

Because it provides time for both existing soil water to infiltrate further and for above-ground water to seep in Signup and view all the answers

Which type of material allows almost no infiltration of water?

Granite Signup and view all the answers

What impact does decaying organic matter have on soil regarding water infiltration?

It creates air spaces that can hold water. Signup and view all the answers

What role does vegetation play in facilitating water infiltration into the ground?

It allows water to seep along roots and creates air spaces. Signup and view all the answers

Why is limestone able to hold large amounts of water despite being permeable?

Since it creates interconnected air spaces. Signup and view all the answers

What factor contributes to the high infiltration rate of water in sand?

Interconnected air spaces between grains Signup and view all the answers

Why does low-lying ground or ground with little slope enhance water infiltration?

It allows water more time to permeate into the ground Signup and view all the answers

What characteristic of clay affects its permeability?

Flat, stacked grains with no air spaces Signup and view all the answers

Which type of material is impermeable and almost cannot absorb water?

Granite Signup and view all the answers

Why does vegetation play a role in increasing infiltration rate into the ground?

It creates air spaces for water to flow through roots Signup and view all the answers

How does limestone differ from granite in terms of water infiltration?

Granite allows easy water infiltration, whereas limestone does not Signup and view all the answers

Which type of ground slope is favorable for enhancing water infiltration?

Flat slope Signup and view all the answers

What effect does decaying organic matter have on soil porosity?

Increases porosity Signup and view all the answers

What enables sand to allow easy infiltration of water?

Porous and permeable nature of sand Signup and view all the answers

How does rain falling slowly benefit infiltration into the soil?

It provides time for existing soil water to infiltrate further down Signup and view all the answers