ACPF: 2. Classification of Riparian Buffer Design Types with Application to Assess and Map Stream Corridors

This paper presents a GIS-based framework for classifying and mapping riparian buffer opportunities in Midwestern headwater watersheds using high-resolution lidar-derived digital elevation models (DEMs). The approach identifies where riparian vegetation can most effectively intercept surface runoff, interact with shallow groundwater, and stabilize streambanks, assigning buffer design types based on site-specific landscape and hydrologic attributes. Applying this classification to six Iowa and Illinois watersheds showed that well-designed riparian buffers occupying as little as 2.5% of watershed area could potentially intercept runoff from 81–94% of upland contributing areas, with significant variation in buffer width needs and function among different glacial landform regions. The results support precision conservation planning by enabling targeted placement of riparian buffers to achieve water quality benefits, and the methodology is implemented as part of the ACPF ArcGIS toolbox.