Predicting Channel Recovery from Sand and Gravel Extraction in the Naugatuck River and Adjacent Floodplain

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by Anne MacDonald, US Army Engineer Waterways, Experiment Station, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering:

Abstract: Gravel extraction at five sites along the Naugatuck River in Connecticut is of sufficient magnitude that channel recovery to pre-mining morphology is expected to require up to several hundred years for instream sites and longer for riparian pits. The bases for this prediction are: a geomorphic evaluation of the channel from sequential aerial photography; hydrographers' records of gaging stations in the basin; and limited calculations of bedload transport, based upon stream power - instantaneous transport rate relations. The pre-mining response of the channel to an extreme flood in 1955 was also examined to determine how the channel might adjust to major disturbance.

Subject Headings: Gravels | Sediment transport | Sand (hydraulic) | Floods | Channel stabilization | Sandy soils | Fluid flow | Water flow | Open channel flow | Bed loads | River flow | North America | Connecticut | United States

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