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https://hdl.handle.net/11681/43220| Title: | Implementation of flexible vegetation into CSHORE for modeling wave attenuation |
| Authors: | Ding, Yan Rosati, Julie Dean Johnson, Bradley D. Chen, Q. Jim Zhu, Ling |
| Keywords: | Coastal plants--Effect of water levels on Hydrodynamics Salt marshes Mathematical models Water levels Water waves--Attenuation Wetlands |
| Publisher: | Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-22-2 |
| Abstract: | This technical report presents the new numerical modeling capabilities for simulating wave attenuation and mean water level changes through flexible vegetation such as smooth cordgrass in coastal and marine wetlands. These capabilities were implemented into the Cross-SHORE (CSHORE) numerical model. The biomechanical properties of vegetation such as dimensions, flexibility, and bending strength are parameterized in terms of the scaling law. Correspondingly, a new formulation of the vegetation drag coefficient, CD, is developed using field data from a salt marsh in Terrebonne Bay, LA, by considering spatially varying effective stem and blade heights of species. This report also presents a general procedure for using the model to simulate hydrodynamic variables (i.e., waves, currents, mean water levels) at vegetated coasts, which are used to quantify the effects of wave attenuation and reduction of surge and runup due to vegetation. Preliminary model validation was conducted by simulating a set of laboratory experiments on synthetic vegetation, which mimicked the flexibility of Spartina alterniflora. The validation results indicate that the newly developed vegetation capabilities enable CSHORE to predict changes of wave heights and water levels through marshes by considering species-specific biomechanical features. The model is also applicable to assess vegetation effectiveness against waves and surges. |
| Description: | Technical Report |
| Gov't Doc #: | ERDC/CHL TR-22-2 |
| Rights: | Approved for Public Release; Distribution is Unlimited |
| URI: | https://hdl.handle.net/11681/43220 http://dx.doi.org/10.21079/11681/43220 |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC-CHL TR-22-2.pdf | 2.44 MB | Adobe PDF |  View/Open |