![Historical Analysis of Disturbance Zones on Finley Creek, Southwest Missouri Derek J. Martin a and Robert T. Pavlowskybc aResearch Specialist, Ozarks Environmental and Water Resources Institute, Missouri State University bDirector, Ozarks Environmental and Water Resources Institute, Missouri State University cProfessor of physical geography, Department of Geography, Geology and Planning, Missouri State University This project applies geographic information systems (GIS) and the use of historical aerial photograph analysis to quantify channel change and assess watershed- and reach-scale relationships among channel disturbance zones, riparian vegetation, bank erosion, and gravel bar distribution along Finley Creek, southwest Missouri. Historical aerial photograph coverage of the main stem of Finley Creek was acquired for the years 1955, 1979, and 2005. Channel bank lines, gravel bars, and riparian land cover were digitized from each of the georectified photographs and overlaid in a GIS in order to identify disturbance zones. Disturbance zones were organized into one of four types: (i) extension, (ii) translation, (iii) chute cutoff, or (iv) megabar. Spatial analyses were performed to examine possible controlling factors of disturbance type development and evolution such as tributary and sub-watershed inputs, valley characteristics, channel confinement, and landuse/landcover. Initial investigations suggest that tributary drainage area and land use as well as valley characteristics exert a strong influence on disturbance reach development, whereas riparian land cover appears to have a negligible effect. This finding may result from the “internal” forcing effect that excess gravel bar deposition has on the channel bank erosion that is independent of bank resistance offered by vegetation. Results and Conclusions Study Area Abstract Classification Finley Creek Watershed Characteristics Mega-bar Formation Kansas City Chute Cutoff Extension Translation St. Louis Geology Topography Tulsa N Research Objectives Landuse ,[object Object]](https://image.slidesharecdn.com/aagwestlakes-124576252133-phpapp02/85/Regional-AAG-2008-1-320.jpg)
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- 2. Investigate possible controlling factors of disturbance zone/type development