NASBLA Public Library

This peer-reviewed study examines the impacts of recreational watercraft on nutrient and sediment resuspension in Indiana’s largest natural lake, providing valuable scientific insight for waterway managers, Boating Law Administrators, and policymakers evaluating wake-enhanced boating activity. Using field-based testing across multiple substrate types, water depths, vessel categories, and operating speeds, the research evaluates how boating activity influences suspended sediments, nutrient loading, and overall water quality. Findings identify measurable impacts associated with wake boats and nearshore plowing operations in shallow water, while also highlighting the role of lakebed composition and aquatic vegetation in mitigating or amplifying disturbance. The study offers practical management considerations related to operational depth thresholds, speed-based restrictions, and sensitive habitat protection. For agencies developing waterway zoning strategies, wake boat regulations, or science-based public safety policies, this resource contributes technical evidence supporting balanced recreational access and long-term stewardship of shared waterways.