SGER: Geomorphological Effects of the 2005 Flood of the Saskatchewan River, Cumberland Marshes, Saskatchewan

SGER：2005 年萨斯喀彻温省坎伯兰沼泽萨斯喀彻温省洪水的地貌影响

• 批准号: 0627169
• 负责人: Norman Smith
• 金额: $ 0.6万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-15 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0627169&HistoricalAwards=false
• 关键词: SGER; Geomorphological; Effects; 2005; Flood

This research will document the erosional and depositional effects of the largest and most sustained flood of the Saskatchewan River (eastern Saskatchewan, Canada) since discharge records were begun. Reconnaissance post-flood observations showed that the flood, controlled by upstream dam releases, caused widening and deepening of main channels as well as major displacements of channel-bed sediment to levee tops, floodplains and anastomosed distributary channels. These initial observations will be documented by a program of cross-channel topographic surveys and sediment sampling and later compared to similar surveys completed before the flood.The results of this work will provide new information concerning the nature of flood effects on river systems immediately downstream of large dams, a situation in which the river is starved of sediment due to impoundment. It will also contribute to a better understanding of how river systems evolve after avulsion (major channel diversion), an event which preceded construction of the dam in the early 1960s.

这项研究将记录自开始排放记录以来萨斯喀彻温河（加拿大萨斯喀彻温省东部）最大、最持续的洪水的侵蚀和沉积影响。 洪水后的勘察表明，洪水在上游大坝泄洪的控制下，导致主河道加宽和加深，以及河床沉积物向堤顶、漫滩和网状分流河道的大量位移。 这些初步观察结果将通过跨河道地形调查和沉积物采样计划记录下来，并与洪水前完成的类似调查进行比较。这项工作的结果将提供有关洪水对紧邻大型水坝下游河流系统的影响的新信息，在这种情况下，河流由于蓄水而缺乏沉积物。 它还将有助于更好地了解撕脱（主河道改道）后河流系统如何演变，这一事件发生在 20 世纪 60 年代初大坝建设之前。