Collaborative Research: Drainage network evolution following continental glaciation

GSTDTAP

项目编号	1656969
	Collaborative Research: Drainage network evolution following continental glaciation
	Karen Gran
主持机构	University of Minnesota Duluth
项目开始年	2017
	2017-08-01
项目结束日期	2020-07-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	127644(USD)
国家	美国
语种	英语
英文摘要	When the Pleistocene ice sheets retreated from low-elevation continental interiors (for example, the upper Midwest), they left behind vast low-relief plains dotted with wetland basins and few well-established streams. It is evident from looking at landscapes formed on glaciated plains of different ages that elaborate stream networks become established over time, reducing the abundance and extent of wetlands and increasing the extent of streams. However, the rate and mechanism of this "drainage integration" is unknown. The consequences of drainage integration are significant not only because erosional reshaping modifies the physical landscape, but also because it forges faster and more direct hydrological connections between uplands and streams. These hydrological connections have important implications for water resource management throughout these landscapes. This collaborative project will combine laboratory simulations, computer modeling of landscape evolution, and field and geospatial analysis of stream network evolution in real Midwestern landscapes uncovered by Pleistocene ice sheets at different times in the last ice age. Each effort will be aimed at understanding the processes and rates of channel extension and wetland basin breaching in real and simulated landscapes. The key objectives are to identify how natural processes of water flow and sediment transport in these settings govern the spatial patterns of evolving stream networks and their rate of development through time.
来源学科分类	Geosciences - Earth Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/71373
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Karen Gran.Collaborative Research: Drainage network evolution following continental glaciation.2017.