![]() Michael’s white, office hookup-turned girlfriend Sarah (Susannah Flood) claims that Michael has not been promoted to partner because of racism. Although Michael's colleague Steven started at the law firm the same time as Michael, Steven has been promoted to partner and makes $800,000 a year. The play's protagonist is a 40-year-old black lawyer named Michael (Gbenga Akinnagbe), who has worked 80 hours a week for the past nine years at a law firm with the same title of senior associate. Ethan McSweeny directs an accomplished ensemble in Thomas Bradshaw’s Fulfillment. Set in present-day Manhattan, the play covers ridiculous housing challenges and various pathways to self-satisfaction that resonate with New Yorkers. Morey, S., Huntington, K., Montgomery, D., Turzewski, M., and Mangipudi, M.: Do megafloods reset mountain valleys?, EGU General Assembly 2021, online, 19–, EGU21-14033,, 2021.Sex, drugs, alcohol and money does not bring contentment to New York City lawyers, but it is still entertaining to watch the lawyers search for inner peace. We predict wide-spread megaflood erosion in the Gorge, potentially enough to reset the system, but would expect exceptional deposition downstream of it, possibly enough to overwhelm this downstream domain. Together, our results suggest that the legacy of a megaflood in the region is both erosional and depositional. For the Yarlung-Siang River to incise into the bedrock in a post-megaflood landscape, it must first make its way through these megaflood deposits. Instead of resetting the system, we predict our megaflood will overwhelm this downstream flood domain with the deposition of coarse- and fine-grained sediment. This is particularly true where we observe significant amounts (>10 km) of megaflood backflow up tributaries. Most of the shear stress and flood power of the simulated megaflood outside of the modern channel boundaries are much lower, capable of moving gravel to sand sized sediment at most. These large boulders could then armor the bed and prevent erosion, which could have lasting consequences for the modern river. At locations that do experience these higher shear stresses, megafloods could move and deposit large (>3 m) boulders, which subsequent annual flows or smaller historical outburst floods would be incapable of moving. Here, we observe few locations that experience sustained (>5 hrs) high (>10 kPa) shear stress and those locations are often isolated and vary through time. We hypothesize that megafloods are predominantly depositional in this downstream domain. In contrast to the erosive power in the Gorge, there is an order of magnitude decrease in average peak flood power downstream of the Gorge. However, we hypothesize that this erosional effect is felt primarily in the Gorge region. These results support previous hypotheses that megafloods can erode more material (both alluvium and bedrock) than the annual monsoon-potentially enough to “reset” the mountain valley by removing most of the sediment and fractured bedrock in the system. ![]() Additionally, in the Gorge, a larger proportion of the inundated valley experiences high flood power and shear stress for long periods of time (5-10 hrs) compared to the valley downstream of the Gorge. Compared to stream power, flood power in the Gorge is disproportionately higher than it is downstream of the Gorge. We find that the simulated megaflood produces peak flood power up to three orders of magnitude higher than the stream power of the annual river. First, to assess erosional potential in the Gorge, we calculate flood power and compare it to measurements of annual stream power. Here, we use 2D numerical simulations of megaflood hydraulics over 3D topography to examine the legacy of these massive floods on this confined, sinuous mountain river. This makes it difficult to fully understand how megafloods shape the landscape. ![]() However, past estimates of megaflood erosion in this region have relied on back of the envelope estimates of peak discharge and shear stress. Quaternary megafloods (10 6 m 3/s) sourced from valley blocking glaciers on the Tibetan Plateau have long been implicated in the evolution of Yarlung-Tsangpo Gorge on the Yarlung-Siang River.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |