Tree City USA Urban and Community Forestry

Drip Drop, How do Trees Make Flooding Stop?

By Sheereen Othman | May 30, 2018

Natural disasters often strike without warning and wreak havoc wherever they land. A city can never be fully prepared for natural devastation, but there are measures they can put in place that will help reduce the impact. One of the easiest and cheapest tools a city can use is its urban forest. A thick, urban forest can reduce the environmental and economic impact of heavy storms.

A dense urban forest helps reduce flooding during a rainstorm because trees act as a sponge by soaking up stormwater. When there are less trees, there is more stormwater runoff. In the same way that shrubs and trees planted along waterways slow flood waters and filter runoff from land, a thick urban forest absorbs excess rain that would otherwise flood flat surfaces. When storm drains reach capacity, stormwater has nowhere to go, so it runs along streets and sidewalks, damaging property.

Trees are critical in urban settings, especially along waterways and other large bodies of water. They help prevent erosion that would otherwise edge its way to adjoining property. Trees prevent sewage from flowing into rivers and polluting the water supply — watersheds that provide drinking water to millions of people — and in turn, protect natural habitat.

Read Trees Make Good Neighbors

The Trees Tame Stormwater interactive poster is a great tool to visually see just how much an urban forest protects a city during a storm.

The first step to making sure your community has a healthy urban forest is ensuring it has an urban forestry plan in place.  The Tree City USA program sets the framework for communities that need guidance to managing public trees. For many large cities, an urban forest is part of the city’s green infrastructure, saving millions of dollars every year in stormwater and treatment costs.

Read Why Tree City USA? Why YOUR City?

But urban forests do more than prevent stormwater runoff. They clean the air we breathe, shade buildings and homes, and beautify communities. Trees increase property value and increase outdoor activity. Trees improve the quality of life for city dwellers, so why wouldn’t we want more of them?

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  • Henry Scott September 11, 2020 at 10:07 pm

    I agree with everything that you have said about trees.what I don’t agree with is the beautiful cypress trees. the beautiful oak trees.the beautiful magnolia trees that will be cut down in our community in November for a bicycle and walking trail.
    Some of these trees are well over 100 years old or older. I wonder what’s going to happen with the Night Herons wich have come back year after year. the hawks,
    The owls and the variety of other birds that we have seen along with the Audubon
    society. The trees that are going to be replanted are no comparison to the beautiful ones that already exist here.
    What ever happened to sustaining and preserving???