Conservation Drainage

Throughout Illinois and other parts of the Midwest, farmers are increasingly investing in tile drainage systems to improve productivity and trafficability of their fields. Conservation drainage practices such as bioreactors, controlled drainage systems, saturated buffers, and constructed wetlands, are designed to capture and treat drainage from tile outlets, providing effective and often long-term nutrient loss reduction benefits.

Woodchip Bioreactors: A Science-based Option to Reduce Nitrate Loss

This fact sheet answers some of the most common questions about woodchip bioreactors using a recent survey of all published bioreactor research.

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Smart Wetlands

Smart Wetlands, an initiative of The Wetlands Initiative, specifically sites, designs, and constructs tile-treatment wetlands to improve water quality in Illinois. Their website includes several resources for better understanding the impact of constructed wetlands on nutrient reduction.

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Iowa Learning Farms: Constructed Wetland

In this webinar, “Tile Flows, Backhoes and Microbes: Constructed Wetlands for Subsurface Drainage Treatment,” Jill Kostel, Ph.D., senior environmental engineer at The Wetlands Initiative, discusses the siting, design and implementation of constructed tile-treatment wetlands that use the naturally occurring wetland functions and processes to capture and remove nutrients from tile flow.

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Journal of Soil and Water Conservation: Constructed Wetlands

This research paper analyzes the ability of restored wetlands to reduce nitrogen and phosphorus concentrations in agricultural drainage water.

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NRCS Controlled Drainage Video

This NRCS video reviews the effect of drainage water management, which allows farmers to actively manage the water on their fields, both in times of surplus and deficit.

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NRCS Constructed Wetlands Video

Join Illinois Natural Resources Conservation Service and our conservation partners as we demonstrate how to design and build a Constructed Wetland. This new conservation practice helps farmers and private landowners improve water quality.

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