Partrac was appointed by South Florida Water Management District (SFWMD) as specialist consultant to provide advice and guidance on a robust and reliable method of interpreting and estimating one of the key sediment transport metrics – the surface critical entrainment threshold (CET) – arising from the use of benthic flumes. Using a sub set of field data supplied by SFWMD, Partrac developed a series of customised Matlab software scripts which provide a consistent methodology with which to analyse the data and derive the first CET point. The software scripts were packaged and delivered to SFWMD as a front-end graphic user interface (GUI).
The processes of sediment erosion and transport are hypothesized to be a key mechanism in maintaining and restoring the patterning and topography of the Everglades ridge-and-slough landscape, a world heritage location. In addition these processes also represent large fluxes of carbon and phosphorus through these systems, and likely underlie the oligotrophic nature of this system. SFWMD is employing several methods to quantify sediment entrainment and transport within the wetland, which include the use of mini benthic annular flumes. The flumes determine erosion directly at the lake bed by imposing a controlled fluid stress onto bottom sediments and then measuring the ensuing erosion.
The GUI is the first of its kind for benthic flume analysis and there is optimism that the GUI may be developed further for other forms of analyses.
For more information, please contact Dr Kevin Black, Technical Director, firstname.lastname@example.org, 0191 224 1302
Plot showing data with zero offset applied
GUI showing the critical lid rotation velocity in RPM at the point the suspended sediment concentration equals or exceeds 10 mg l-1