Sediment Production From Forest Roads in Western Montana1
| Autor: | Scott W. Woods, Brian D. Sugden |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Sediment yield
Pollution Hydrology geography geography.geographical_feature_category Ecology media_common.quotation_subject Drainage basin Glacial till Precipitation Surface runoff Grading (engineering) human activities Nonpoint source pollution Geology Earth-Surface Processes Water Science and Technology media_common |
| Zdroj: | JAWRA Journal of the American Water Resources Association. 43:193-206 |
| ISSN: | 1093-474X |
| DOI: | 10.1111/j.1752-1688.2007.00016.x |
| Popis: | Unpaved roads are a primary sediment source in forested watersheds. Validation of erosion models and improvements to road management require information on road erosion rates and the factors controlling erosion. This study measured sediment yields from twenty ∼0.05 ha unsurfaced (native) road plots in Belt Supergroup and glacial till parent materials of western Montana, and investigated the factors controlling erosion. Annual sediment yields for individual plots ranged from 0 to 96.9 Mg/ha/yr over 3 years (2002-2004). Annual mean sediment yield ranged from 2.1 Mg/ha in 2003 to 9.9 Mg/ha in 2004 with an overall mean of 5.4 Mg/ha/yr. The mean of log-transformed sediment yields for sites in glacial till parent materials was higher than Belt Supergroup parent materials (p = 0.063). A regression model with road slope, time since last grading, roadbed gravel content, and precipitation as predictive variables explained 68% of the variability in sediment yield (F = 28.2; p |
| Databáze: | OpenAIRE |
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