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Full-Text Articles in Physical Sciences and Mathematics
Impacts Of Changing Snowmelt Timing On Non-Irrigated Crop Yield, Erin Murray
Impacts Of Changing Snowmelt Timing On Non-Irrigated Crop Yield, Erin Murray
Boise State University Theses and Dissertations
As climate changes, the final date of spring snowmelt is projected to occur earlier in the year within the western United States. This earlier snowmelt timing may impact crop yield in snow-dominated watersheds by changing the timing of water delivery to agricultural fields. There is considerable uncertainty about how agricultural impacts of snowmelt timing may vary by region, crop type, and practices like irrigation vs. dryland farming. We utilize parametric regression techniques to isolate the magnitude of impact snowmelt timing has had on historical crop yield independently of climate and physiographic variables that also impact yield. To do this, we …
Vegetative And Climatic Controls On Holocene Wildfire And Erosion Recorded In Alluvial Fans Of The Middle Fork Salmon River, Idaho, Kerry Riley, Jennifer Pierce, Grant A. Meyer
Vegetative And Climatic Controls On Holocene Wildfire And Erosion Recorded In Alluvial Fans Of The Middle Fork Salmon River, Idaho, Kerry Riley, Jennifer Pierce, Grant A. Meyer
Geosciences Faculty Publications and Presentations
The Middle Fork Salmon River watershed spans high-elevation mixed-conifer forests to lower-elevation shrub-steppe. In recent decades, runoff from severely burned hillslopes has generated large debris flows in steep tributary drainages. These flows incised alluvial fans along the mainstem river, where charcoal-rich debris-flow and sheetflood deposits preserve a record of latest Pleistocene to Holocene fires and geomorphic response. Through deposit sedimentology and 14C dating of charcoal, we evaluate the processes and timing of fire-related sedimentation and the role of climate and vegetation change. Fire-related deposits compose ~66% of the total measured fan deposit thickness in more densely forested upper basins …