The Coastal Erosion Mitigation Solution (CEMS®) analyzes specific beach, wind, wave, sediment, and other significant characteristics and integrates the results of this analysis and development of input data set matrices into a discrete, scientifically based, solution design that is tailored to the specific beach and operates upon the measured and predicted beach dynamics based on the probabilities of occurrence of these beach dynamics.
The CEMSŪ components which will be implemented on a project include:
- Pre-installation Assessments and Input Matrices Development- Extensive data gathering and assessments of beach geomorphology, hydrodynamics, NOAA Buoy information, US Army Corps of Engineers model data; e.g., GENESIS, and other sources is accomplished to develop input data set matrices for solution determination.
- Development and design of a custom beach solution - The core of the CEMS® regime is the integration of the above input data set matrices into a series of preliminary model excursions, which, when combined with probability analysis, result in a discrete, best fit, high reliability, tailored solution for erosion control and mitigation. Multiple model excursions are accomplished to establish the efficacy of the proposed solution in preparation for site adaptation. Through the use of BRI proprietary modeling programs, a site specific project plan is then developed for subsequent site adaptation.
- Installation of BRI Low Profile Stabilization System (LPSS) - Through the unique use of geo-tube fabrication, placement and filling (See Figure below), BRI creates a porous groin field which generates "deposition zones" that allow alongshore currents to bring and maintain sand on the eroded beach.
Once placement of the tubes is completed, sand deposits will immediately start forming within the deposition zones. This build-up of sand allows for sand movement to stabilize and reduce the cross-shore variability of beach width. Other than for significant storm events, erosion mitigation is immediate.
- Post installation monitoring program - Once the system has been put in place, a six month monitoring program will provide Galveston a measurement system from which the results and analysis will determine the effectiveness of the system.