Question

how the river basin can reduce rainwater runoff
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Answer 1

Answer:

In addition to increasing imperviousness, removal of vegetation and soil, grading the land surface, and constructing drainage networks increase runoff volumes and shorten runoff time into streams from rainfall and snowmelt. As a result, the peak discharge, volume, and frequency of floods increase in nearby streams.

Answer 2

Answer:

Reducing runoff is critical to minimizing the impact our yards and gardens have on the surrounding lakes and streams. There are many ways to encourage rainwater to soak into the ground. Or you can capture rainwater for use in your yard. Either way, stormwater is reduced and our lakes and rivers stay clean.

these are the following ways to reduce run off

• Permeable surfaces: Let it soak in

Rain will soak in to ground where there are gardens and other vegetation. These surfaces are permeable, meaning they let the water through. Rain will not soak through your roof, most driveways, or roads. These surfaces are impermeable.

When you are planning changes to your house or lot, think about reducing the size of hard surfaces. For areas where hard surfaces are necessary, consider pavers or pavement that lets water through. There are now a variety of permeable pavements on the market that are specifically designed to increase infiltration into the ground. Ask your contractor or home and garden supply store for water-friendly pavers, or porous pavement or asphalt.

• Rain gardens and native plants: Beautiful solutions to water pollution

A rain garden is a popular landscaping choice that prevents water pollution by allowing stormwater to soak into the ground before it runs off.

Rain gardens and native plants also:

Prevent erosion by holding soil in place with their deep roots.

Attract birds and butterflies.

Require little watering and maintenance once established.

Rain gardens are concave gardens that collect runoff from downspouts or driveways. Plants that tolerate "wet feet" should be planted in the bottom, while plants that need less water are planted on the edges.

For information about rain gardens, check out the Minnesota Department of Natural Resources or the city of Maplewood websites.

The Blue Thumb Guide to Raingardens leads home owners through the steps of designing and installing rain gardens in their yards. Blue Thumb also has a Plant Selector Tool. Simply enter in the conditions of your yard—shady or sunny, wet or dry—and the tool will create a list of native plants that will grow well in those conditions.

Attend a Metro Blooms raingarden workshop.

Rain barrels

Rain barrel for collecting rain off your roofAnother way to reduce runoff is to capture some of it with rain barrels. Rain barrels also help conserve water. They can be fancy or simple, but the basic structure is to have a barrel at the end of a downspout. The barrel has a spigot or hose that you can use to water your garden or yard. Several home improvement stores now sell rain barrels.

Explanation:

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