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<br />. <br /> <br />. <br /> <br />chemistry will be measured using small tubes (PBC) <br />driven into the beach along transects. Levels and <br />samples can be measured and taken from these tubes. <br /> <br />Water chemistry parameters will be primarily nutrient <br />compounds (e.g., nitrogen, phosphorus, etc.) <br /> <br />Sampling period will be at least two days prior to the <br />constant flow (fluctuating flows) and two days after <br />the constant flow. This will allow measurements of the <br />response of the beach front to alteration of flow <br />regimes from fluctuating flows into constant flows and <br />the t'everse. <br /> <br />Requirements: <br />Permission from NPS for two oars boat trips to place <br />personnel on the beaches and to pick them up. <br /> <br />Permission from NPS to keep a team on a beach for at <br />least a week and to place micro-survey sampling devices <br />on the beach during this period. <br /> <br />Permission from NPS to place sampling tubes in the <br />selected beaches and to take water samples. <br /> <br />Water Chemistru <br /> <br />Objectives: <br />Determine the nutrient changes' in the river at one <br />location over a period of time under different flow <br />regimes. <br /> <br />Determine the nutrient changes over the length of the <br />river system under different flow regimes. <br /> <br />Justification: <br />Nutrients in the river are the basis of primary <br />productivity and therefore the support system for all <br />trophic levels in the river. fluctuating flows create <br />irregular exchanges of nutrients with bank storage <br />water, sediments stored in eddies and the channel, as <br />well as other inputs. Nutrient dynamics measured under <br />constant flow conditions, bordered by fluctuating <br />flows, should allow evaluation of the change and <br />movement of nutrients in the system under two sets of <br />conditions and the gradient between them. <br /> <br />Methods: <br />Tests will be for total and dissolved phosphorus, <br />ammonia, nitrate, nitrite, kJeldahl or total nitrogen, <br />organic matter (coarse, fine and dissolved) and silica. <br /> <br />5 <br />