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River Response To Sediment Supply: The Sand Bed Case, Christina M. Leonard
River Response To Sediment Supply: The Sand Bed Case, Christina M. Leonard
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Effective management of in-channel and floodplain habitat requires an ability to forecast river response to changes in water and sediment supply. These changes may result from dam construction/decommissioning, changes in reservoir operations, or changes in grazing or forestry practices. If a change in water and sediment supply causes sediment to be delivered faster than the channel’s capacity to transport it, sediment will accumulate in the reach, leading to changes in channel form and increasing the potential for flooding. A decrease in sediment supply relative to transport capacity can lead to channel incision. The extent and timing of sediment accumulation or …
Engelmann Spruce Survival And Regeneration After An Epidemic Spruce Beetle Outbreak On The Markagunt Plateau In Southern Utah, Jessika M. Pettit
Engelmann Spruce Survival And Regeneration After An Epidemic Spruce Beetle Outbreak On The Markagunt Plateau In Southern Utah, Jessika M. Pettit
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Bark beetle outbreaks are becoming more intense and severe when coupled with the effects of climate change. Engelmann spruce (Picea engelmannii) is one such species facing large-scale, epidemic spruce beetle outbreaks. Large-scale disturbances, such as beetle outbreaks, have major consequences for the future success of the ecosystem, thus highlighting the importance of understanding what promotes amplified outbreaks as well as their effects on future seedling establishment. Our research focused on two parts of a large-scale beetle outbreak: the mortality of spruce trees and the subsequent regeneration of seedlings. Our first study examined the timing of spruce mortality during …