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i <br /> Vegetation - If at least fifty (SOW) percent of the plants <br /> are salt tolerant parts per thousands) , the stream is tidally <br /> dominated or estuarine. This aspect bei.ng the most difficult to <br /> determine. Some plants studied have proven to be tolerant above <br /> the one hundred twenty-five foot area. <br /> Stream Morphology - when the sides of the strewn channel <br /> diverge, the area is probably located outside of the riverain <br /> system and into a more estuarine system. A combination of these <br /> elements should result in agreement of the point of transition <br /> from tidally dominated to freshwater system. <br /> Mr. Sherman mentioned the DEP Delineation of wetlands <br /> criteria includes evidence of hydrology, soils, and plant <br /> community. Determination is made if two out of the three <br /> elements indicate wetland. He is particularly interested in <br /> the majority findings. <br /> Salinity Measurements - "Criteria Applied to 125 feet <br /> Upstream from Concrete Weir" References were being made as to <br /> where salinity measurements had been taken in order to compile <br /> the data (vertical samplings, from bottom to top) . <br /> Some samples had been taken from Shoestring Bay and used <br /> as the benchmark. Samplings were also taken along the Quaker <br /> Run Riverfront area. <br /> Water Depth - Relates to a tidal amplitude. If tidal <br /> changes in the stream water depth at high tide are at least twice <br /> as great than in the strewn at low tide, and if tidal changes in <br /> water depth are regular, the stream is tidally dominated. <br /> vegetation - If at least fifty . percent of the plants <br /> are salt tolerant, parts per thousand are greater) the stream <br /> is tidally dominated. <br /> Diane Boretos challenged this criteria using North liver <br /> brackish area as an example. <br /> Michael Talbot requested a copy of the plant listings <br /> determined to be salt tolerant be make available to the <br /> Comm s s i on. <br /> Mr. Sherman informed the Commission that he and Joanne <br /> Maramuto have identified the dominant plants according to DEP <br /> criteria, being seven in neer, five of the seven 7 have <br /> been proven to be salt tolerant. <br /> The Chairman asked the significance of using the 125 ft. <br /> measurement. Mr. DiGregorio replied the 125 f t. is somewhat <br /> arbitrary, that all three criteria were used in an attempt to <br /> justify the fresh water influence. <br /> _1 - <br />