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In situ-produced cosmogenic 10Be was measured in 17 sediment samples to estimate the rate and distribution of sediment generation in the upper Río Chagres basin over the last 10 to 20 kyr. Results indicate that the upper Río Chagres basin is generating sediment uniformly. Nuclide activities suggest basin-wide sediment generation rates of 143 and 354 tons/km/yr (avg. = 234 ± 74 tons/km/yr; n = 7) for...
Estimates of long-term, background sediment generation rates place current and future sediment fluxes to the Great Barrier Reef in context. Without reliable estimates of sediment generation rates and without identification of the sources of sediment delivered to the reef prior to European settlement (c. 1850), determining the necessity and effectiveness of contemporary landscape management efforts...
We measured 10 Be and 26 Al in 64 sediment and bedrock samples collected throughout the arid, 187 km 2 Yuma Wash drainage basin, southwestern Arizona. From the measurements, we determine long-term, time-integrated rates of upland sediment generation (81+/-5 g m -2 year -1 ) and bedrock equivalent lowering (30+/-2 m Ma -1 ) consistent...
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