Parameters and Metrics to Assess a Complex Floodplain
Cidney Jones, PE & CFM
Ecosystem Planning and Restoration
Manchester, TN
This presentation will apply the stream functions pyramid framework to assess single-thread stream systems with complex floodplains and anastomosed systems with a definable channel. Leberg (2023) describes four key processes for dynamic alluvial valleys as 1) extensive lateral and vertical connectivity; 2) creation and maintenance of a diverse patchwork of wetland, channel and off-channel habitats; 3) retention of materials (wood and sediment); and 4) abundant and diverse biological communities. Using these key processes as a road map, function-based parameters that describe each functional category of the stream functions pyramid will be discussed. Metrics that quantify each parameter, and potential sources for reference standard criteria will be presented. The proposed parameters and metrics can be incorporated into existing Stream Quantification Tools (SQTs) or applied in new SQTs to assess functional uplift and loss to inform credits and debits under the CWA 404 compensatory mitigation program. This research is currently ongoing and includes a review of existing and ongoing research, discussions with researchers and regulators from around the United States, and a case study from Yukon Charley National Forest in Alaska.
About Cidney Jones, PE & CFM
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