When people think about stormwater management, they usually think about storm drains, detention ponds, and pipes.
What they don’t think about is soil.
Yet healthy soil is one of the most important parts of managing rainwater.
Every drop of rain has two choices: soak into the ground or run across the surface. Healthy soil helps more water soak in where it falls.
Soil Is Nature’s Sponge
A healthy soil contains tiny spaces filled with air and water.
When rain falls, those spaces allow water to move into the ground rather than running across the surface.
This natural storage helps:
- Reduce runoff
- Reduce flooding
- Filter pollutants
- Recharge groundwater
- Support healthy plants
In many ways, soil works like a sponge beneath our feet.
Not All Soil Acts the Same
Here in Nebraska, many residential areas are built on loam or sandy loam soils.
These soils generally do a good job of balancing drainage and water storage. They can absorb rainfall while still holding enough moisture to support plants.
But even good soil can stop working well if it becomes compacted.
The Real Problem: Compaction
Imagine squeezing a sponge in your hand.
The more you squeeze, the less room there is for water.
The same thing happens to soil.
Construction equipment, vehicles, repeated foot traffic, and even routine lawn use can press soil particles together. When that happens, the spaces that normally hold air and water become smaller. Water has a harder time soaking in and is more likely to run off the surface.
Signs of compacted soil may include:
- Water ponding after rain
- Excess runoff
- Thin or stressed grass
- Soil that is difficult to dig
Roots Help Keep Soil Healthy
Plants do more than grow above the ground.
Their roots help create pathways for water to move through the soil.
Trees, native plants, prairie grasses, and healthy lawns all contribute to soil structure by creating spaces where water can infiltrate.
This is one reason green infrastructure often focuses on vegetation. Healthy plants and healthy soil work together.
Organic Matter Makes a Difference
Leaves, roots, compost, and other natural materials break down over time and become organic matter.
Organic matter helps soil:
- Hold water
- Support beneficial organisms
- Improve soil structure
- Resist compaction
A soil rich in organic matter can often absorb rainfall more effectively than a soil that has been disturbed or compacted.
What Can Homeowners Do?
The good news is that soil health can improve over time.
Homeowners can help by:
- Leaving grass clippings on the lawn
- Adding compost to planting beds
- Avoiding unnecessary traffic on wet soils
- Aerating compacted lawns when needed
- Planting trees and native vegetation
- Maintaining healthy plant cover
Small improvements to soil health can have long-term benefits for stormwater management.
Why It Matters
Many stormwater solutions are easy to see. Pipes, ponds, and storm drains are visible parts of the system.
Healthy soil is different. Most of its work happens underground.
Every time rain soaks into the ground instead of running across a street or parking lot, healthy soil is doing its job.
That’s why one of the most important pieces of stormwater infrastructure may be the one people rarely notice.
Our Water. Our Responsibility.