A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Forensic Hydrodynamic Evaluation Following the Restoration of a Tidal Freshwater Wetlands
The Kandoll Road Restoration Project modified the existing structures on Kandoll Farm to return the farm to a freshwater tidal wetland. The farm is located on the Grays River, Washington that flows into the Columbia River at approximately river mile 24. Grays River is subject to the tidal and upstream flow conditions of the Columbia River. The restoration involved breaching the Grays River dike in three locations, installing two 13-ft culverts, and changing the elevation of Kandoll Road. These restoration actions were completed in August 2005. In late December 2005 and mid-January 2006, flooding occurred in the Grays River floodplain including the restoration area and adjacent areas offsite. A hydrodynamic modeling evaluation was done using the model RMA2 to determine the cause of the off-site flooding. The model was calibrated using available hydraulic data collected during the restoration evaluation which included the period of flooding. From the hydrodynamic modeling analyses, two types of flooding events were found to have occurred in December 2005 and January 2006. The first type was a tidally-induced flood event originating with higher-than-normal water levels in the Columbia River. This resulted in the overtopping of Kandoll Road from the restoration side and flooding of the offsite area adjacent to the restoration site. The second type was a river flooding event originating from high runoff upstream. This caused overtopping of dikes upstream of the offsite area, and overtopping Kandoll Road from the north.
Forensic Hydrodynamic Evaluation Following the Restoration of a Tidal Freshwater Wetlands
The Kandoll Road Restoration Project modified the existing structures on Kandoll Farm to return the farm to a freshwater tidal wetland. The farm is located on the Grays River, Washington that flows into the Columbia River at approximately river mile 24. Grays River is subject to the tidal and upstream flow conditions of the Columbia River. The restoration involved breaching the Grays River dike in three locations, installing two 13-ft culverts, and changing the elevation of Kandoll Road. These restoration actions were completed in August 2005. In late December 2005 and mid-January 2006, flooding occurred in the Grays River floodplain including the restoration area and adjacent areas offsite. A hydrodynamic modeling evaluation was done using the model RMA2 to determine the cause of the off-site flooding. The model was calibrated using available hydraulic data collected during the restoration evaluation which included the period of flooding. From the hydrodynamic modeling analyses, two types of flooding events were found to have occurred in December 2005 and January 2006. The first type was a tidally-induced flood event originating with higher-than-normal water levels in the Columbia River. This resulted in the overtopping of Kandoll Road from the restoration side and flooding of the offsite area adjacent to the restoration site. The second type was a river flooding event originating from high runoff upstream. This caused overtopping of dikes upstream of the offsite area, and overtopping Kandoll Road from the north.
Forensic Hydrodynamic Evaluation Following the Restoration of a Tidal Freshwater Wetlands
Breithaupt, Stephen (author) / Khangaonkar, Tarang (author)
10th International Conference on Estuarine and Coastal Modeling ; 2007 ; Newport, Rhode Island, United States
Estuarine and Coastal Modeling (2007) ; 618-632
2008-08-25
Conference paper
Electronic Resource
English
Restoration of floodplains along a freshwater tidal river: the Scheldt
| British Library Conference Proceedings | 1992
| TIBKAT | 1992
Vegetating Freshwater Wetlands
| Online Contents | 1994