Geospatial analysis of bank erosion for conservation planning, Lamar Lake Watershed, Missouri

Authors: Hannah Adams*, Missouri State University, Robert Pavlowsky, Missouri State University
Topics: Physical Geography, Environment
Keywords: bank erosion, sediment supply, agriculture
Session Type: Poster
Day: 4/12/2018
Start / End Time: 8:00 AM / 9:40 AM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded


Eutrophication is caused by excess nutrients and sediment that produce large algal blooms. In municipal water supplies, large amounts of algae lead to chronic taste and order problems often disrupting civilian use. Lamar Lake, located in SW Missouri, is experiencing this problem. In 1998 Lamar Lake was listed under section 303(d) of the federal Clean Water Act for algae pollutants caused by excess phosphorus. However, little is known about the role of bank erosion as a nonpoint pollution source in Lake Lamar. Historical aerial photos were used to digitize streams to analyze changes in channels for the following years: 1953, 1966, 1997, 2008, and 2016. Disturbances were classified using a 1.3-meter buffer based on the 1966 aerial photos Max Point to Point Error. Riparian corridor condition was classified using the 2016 aerial imagery. The channel change and riparian classifications will be used to identify potential nonpoint sediment sources to the lake. LiDAR data from 2015 was used to measure bankfull height, bankfull width, and a cross-sectional area which were compared to the Osage Plains Regional Curve. Bank width plotted above the regional curve but follows a similar positive trend. Results will be used plan a field study of channel stability and bank erosion to help identify conservation practices that are most beneficial to improve water quality.

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