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The Great Plains

Reconnecting Rivers, Restoring Life

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Two adults and two children standing in a river and playfully splashing each other.

Rivers shape our landscapes and lives. Now it’s our turn to protect them—for nature, for people, for the future.

Langille-Hoppe Family Volunteers at the Recycle for Nature program at Oka' Yanahli Preserve along the Blue River near Ada, Oklahoma. © Bill Marr/TNC

A turquoise blue river lined with tall, green trees.
A critical Freshwater source The Blanco River in the Texas Hill Country. © Christopher Zebo

From sunny prairies to working ranchlands to shade-dappled forests, Great Plains landscapes are shaped by rivers and streams that carve landscapes, support communities and sustain diverse plant and animal life.

But our rivers are at risk. Great Plains rivers—including the Mighty Mississippi and its tributaries—face major threats from industrial pollution, deforestation, unsustainable farming and climate change. And in an attempt to control their flow and direction, we’ve unintentionally put people and nature at risk by disconnecting rivers and streams from the land around them.

In the Great Plains, almost 212 million acres of cropland affect 843,596 miles of streams, causing water quality issues and disrupted flow patterns. U.S. Army Corps of Engineers dams and infrastructure influence 53,000 miles of rivers across the U.S., about half of which are in this region. 

TNC’s Global Freshwater Goals

By 2030, we will:

  • A river with trees along its edges.

    1M

    Safeguard or restore at least 1 million kilometers of healthy rivers and streams—enough to stretch around the globe 25 times.

  • A bird next to a cattail plant in a marsh.

    30M

    Conserve 30 million hectares of healthy lakes, wetlands, deltas and floodplains.

  • Three people.

    10M

    Ensure over 10 million people benefit directly from healthy freshwater ecosystems.

A river view from overhead, with trees showing yellow and orange fall color on the banks.
St. Louis River The land around the St. Louis River estuary shows off its fall colors. © Richard Hamilton Smith

And yet rivers keep moving, demonstrating their resilience and inviting us to reconnect. Across the Great Plains, The Nature Conservancy is joining partners in answering the call and acting for rivers—from bringing back natural flows to restoring prairie wetlands and protecting land around crucial waterways.

Together, we can rediscover why healthy rivers matter.

Reconnecting Our Rivers and Streams

Learn how creative collaboration is helping restore rivers and streams across the Great Plains.

Tap the circles to explore the interactive map Return
Two people stand underneath an irrigation system in a farm field.
© Katie Roby/TNC

6 Questions for Heidi Mehl

Freshwater Director, TNC's Great Plains Division

Heidi Mehl headshoot.
Heidi Mehl Heidi is the Freshwater Director for The Nature Conservancy's Great Plains Division. © Daniel J. Videtich

Water has always been central for Heidi Mehl, freshwater director for the Great Plains division of The Nature Conservancy. As a child, she caught frogs and salamanders in a creek near her Kansas home and saw people canoeing through her town’s streets during devastating floods. And in college, she spent three summers working with local communities in Siberia to test water quality in springs and rivers.

Today, she’s coordinating TNC’s freshwater work throughout the Great Plains, bringing people together so they can share knowledge and tackle big projects.

 

What are the specific challenges of freshwater conservation in the Great Plains?

In this region, we have very humid climates in the east and dryer climates in the west. In the eastern part of the Great Plains, we have challenges from flooding, erosion and water quality issues. In the west, the big issues are water scarcity, declining groundwater and different types of water quality issues. So our work in the Great Plains really reflects the diversity of these issues.

Why is this work important?

Water connects us all across communities and across landscapes. It's a crucial element that's needed by all living things. However, human activity has impacted freshwater ecosystems more than any other habitat type. Freshwater plants and animals have declined by 83% since 1970 and only a third of the world's longest rivers remain free-flowing. Wetlands are disappearing three times faster than tropical forests.

This not only affects freshwater plants and animals, but also compromises the water supply needed for human communities and for agricultural production. So it's really urgent that we adopt better ways to manage our water resources.

When we talk about reconnecting rivers, what does that mean?

Scientists think of reconnection in two ways. We can connect along the length of the river channels, from upstream to downstream. This includes things like removing dams or other human-made obstructions that allow fish to migrate and access more habitats.

We also think about reconnecting the river with its floodplains so it can move and ebb and flow and connect outside of its main channel. That’s done through things like levee removal or levee setbacks or managing the flow of water coming from dams.

All of these strategies help freshwater plants and animals and can also improve water quality for people.

Woman sitting on a large boulder with an expanse of water behind her.
Summers in Siberia As an undergraduate, Heidi Mehl spent three summers working with local communities in Siberia to test water quality in springs and rivers. © Heidi Mehl/TNC

Why is it so important to restore floodplains?

In their natural state, rivers flow onto floodplains after large rainstorms, and those floodplains store the water and remove pollutants. But we’ve put up dams and levees and constricted these rivers to a narrow channel so that we could put homes, farms and other development on the floodplains.

The goal of water management has been to send as much water downstream as quickly as possible. And when you send floodwaters downstream, they have to go somewhere. Often, the areas that receive the floodwaters are more economically vulnerable, so there are equity issues.

We have a great partnership with the U.S. Army Corps of Engineers called the Sustainable Rivers Program. It allows us to manage the flow of water out of dams to better support aquatic habitats. In some cases, that also includes reconnecting floodplains.

What's the best part of your job?

I’m grateful every day because I feel really privileged to be doing something that I love and I'm passionate about—something that is hopefully leaving the world a better place for my daughter. She's six years old and I think about what kind of experiences she'll get to have in nature and how those experiences will shape who she becomes.

What brings you hope?

Forging partnerships and finding pragmatic solutions that work for both people and nature is such an important key to reshaping the way we manage our water resources. We can grow profitable crops and use water-smart farming practices. We can build cities and manage runoff to keep our streams healthy. We know how to do it. We just need to have the will to do it.