Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
Corte Madera Creek Flood Control Project, Marin County, Statement of Findings
Author: Corte Madera Creek Flood Control Project, Marin County
Author: Corte Madera Creek
Author: Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 176
Book Description
Corte Madera Creek, Marin County, California, Modified Unit 4 Sedimentation Study
Author: Ronald R. CopelandPublisher:
ISBN:
Category : Corte Madera Creek (Calif.)
Languages : en
Pages : 78
Book Description
Corte Madera Creek Flood Control Project, Unit 4, Town of Ross, Marin County, California
Author: Corte Madera Creek Flood Control Project, Marin County
Author: Corte Madera Creek Flood Control Project Unit 4, Town of Ross, Marin County, California
Author: Corte Madera Creek, Marin County, California, Modified Unit 4 Sedimentation Study
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Sediment deposition occurs in the lower reaches of the concrete-lined Corte Madera Creek flood control channel because the elevation of the channel bottom is below sea level. These sediment deposits, combined with the presence of tube worms and barnacles on the channel walls, reduce the flood-carrying capacity of the channel. The upstream portion of the original flood control project was not completed and flood flows above 3,000 cfs are not contained in the natural channel upstream. Thus, there is reduced flow competency to carry the coarse sediment load delivered by flood flows. With annual maintenance and upstream containment of breakout flows, most of the sediment deposited in the concrete channel from seasonal antecedent flow can be washed out by the time the flood peak occurs. An HEC-6 numerical sedimentation model study was conducted to evaluate several alternative plans to provide flood containment and sediment storage while also maintaining the natural characteristics of the upstream channel.
Corte Madera Creek Sedimentation Study
Author: Ronald R. CopelandPublisher:
ISBN:
Category : Corte Madera Creek (Calif.)
Languages : en
Pages : 156
Book Description
A one-dimensional numerical model was used to determine the effects of sediment deposition in the Corte Madera Creek flood control channel. The effect of accumulated gravel deposits in the concrete-lined channel on hydraulic roughness was evaluated. The effect of a proposed sediment trap at the upstream end of the project on reducing gravel deposits was determined. The performance of the project during a design flood event was simulated. (fr).
Preliminary Environmental Assessment, Section 10 Permit Activity Within Corte Madera Creek and Richardson Bay, Marin County, California
Author: Madrone AssociatesPublisher:
ISBN:
Category : Environmental policy
Languages : en
Pages : 602
Book Description