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This technical bulletin discusses riparian buffers and controlled drainage as best practices to reduce nonpoint (diffuse runoff) water pollution in North Carolina's basins. The article covers in-depth explanations of riparian buffers and controlled drainage; designs, how they work to protect stream health and reduce nitrogen and pesticides. Recommendations for best practices are provided for the coastal plain, lower coastal plain and Tidewater, middle and upper coastal plain, Piedmont and mountain regions. A glossary of terms is included.
This publication discusses how to use controlled drainage as way to to reduce nutrient losses from agricultural land to surface waters and groundwater. It includes information on controlled drainage systems, structure location and management, and water quality and crop yield benefits.
This publication explains how future agricultural practices must be designed and managed to protect water quality.
This publication discusses how the Nitrogen Loss Estimation Worksheet Tool can be used to account for agricultural nitrogen levels as an alternative to water quality monitoring.
This publication summarizes design considerations, system operations and information on monitoring controlled drainage and subirrigation systems.
Before installing a dual-purpose subsurface drainage and subirrigation system on your farm, have your site evaluated by the local Soil Conservation Service (SCS) to determine whether this option is suitable for your farm and your needs. If your site is found to be physically suitable, this publication will help you determine whether installing this type of system will be a wise investment.
