Study finds 13‑ton sediment from Arkansas unpaved roads
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- Shannon Speir measured up to 13 tons of sediment entering Brush Creek in a single day during a large storm, equivalent to a dump‑truck load of material.
- Speir’s team found that watershed‑scale controls—total length of unpaved roads, proportion of pastureland, and flow conditions—had a larger influence on sediment loss than the presence of direct road crossings.
- Project BEACON will test biochar‑amended poultry litter as a farm‑scale amendment to capture nutrients and reduce runoff across the Brush Creek watershed.
- Arkansas Unpaved Roads Program and the Beaver Watershed Alliance estimate that applying best‑management practices to unpaved roads could cut sediment loads to Beaver Lake by more than 800 tons per year.
- The study was published in the Journal of Environmental Quality (2026) under the title “Watershed‑scale controls outweigh local crossing effects on sediment loss from unpaved roads,” providing a new framework for landscape‑level water‑quality management.
Why it matters: Farmers and landowners in the Brush Creek watershed gain a clearer roadmap for reducing sediment that threatens Beaver Lake’s drinking water, while water utilities and downstream communities benefit from projected cuts of over 800 tons of sediment per year through coordinated road and on‑farm best‑management practices.
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