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Draft Indian River County Lagoon Management Plan Outline April 2019 6.0 RESEARCH NEEDS 6.1 MONITORING AND DATA MANAGEMENT Review and compile all historical records available for current and historical resources. Compile National Pollutant Discharge Elimination System data, LOB data, Kilroy data, muck presence data, and seagrass data, current and historical bivalve data, and hydrodynamic data. Prepare a Monitoring and Data Management Plan as part of the IRL Plan. 6.2 SEAGRASS BEDS Review historical information on the locations and extent of seagrass in the Indian River Coun y'portion of the IRL. Use SJRWMD data on the seagrass transects (lengths and densities of the seagrass beds /and aerial imagery of seagrass locations to evaluate historical seagrass extent, current extent, and changes ver time. Review water quality data and muck location information to determine where conditions may allow for eagrass growth and where projects to improve conditions will be needed before seagrass can regrow. Collab• ate with other organizations, such as FWC and Harbor Branch Oceanographic Institute, to evaluate pilot studi to test different techniques for seagrass planting to determine a viable method for assisting with seagrass ' -vitalization in this portion of the lagoon. 6.3 MUCK REMOVAL Muck is defined as black, organic -rich (greater than 10% organic m high water content (greater than 75% water by weight, greate sediments inhibit the growth of natural benthic communities include the review of available muck mapping data to evalua and benefits for additional surveys to provide a data set Evaluate nutrient flux from muck deposits to determine 6.4 BIOSOLIDS Approximately 70% of Class B biosolids in the biosolids applied to land application sites m or Class B biosolids. No treatment requir biosolids with high nutrient concentrati track where biosolids are being appli the soil. DEP recently created a Bi and potential opportunities for e November 2018 and were co and are treated as fertilizer er), mud -rich (greater than 60% silt and clay), than 90% water by volume) sediments. These d flux nutrients to overlying water. Research will the presence and quantities of muck. Evaluate costs at will allow the County to prioritize for muck removal. e nutrient loading to the IRL. tate are applied in Indian River, Brevard, and Osceola counties. All st meet the pathogen reduction requirements for Class AA, Class A, ments exist for nutrients when producing biosolids, which may lead to s being applied in the IRL watershed. As a result, it will be important to d, determine the nutrient content, if possible, and track levels of nutrients in olids Technical Advisory Committee to evaluate current management practices ancements to better protect Florida's water resources, and workshops began in eted in January 2019. Class A and AA Biosolids are not tracked for land application the industry. 6.5 COMMUNITY ' EVELOPMENT CONSIDERATIONS The Coastal Management Element of the County's Comprehensive Plan was revised on June 5, 2018 to update information and incorporate goals, objectives, and policy changes related to planning for sea level rise impacts as mandated by the state. Based on the analysis conducted during the comprehensive plan update, privately owned estuarine wetlands and undeveloped lagoon island conservation areas were determined to be the most vulnerable areas with respect to sea level rise inundation impacts. It is estimated that more than 85% of existing coastal wetlands are at risk of inundation under the three-foot sea level rise scenario. Consistent with the Coastal OTETRA TECH 17