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Water
samples are collected bi-weekly at inflow, outflow and
in constructed ponds along with temperature, dissolved
O2, pH, and specific conductivity. In addition, automated
sampling is conducted on a flow- proportioned basis at
inflow and outlet channels during runoff events with water
samplers equipped with flow meters. Water samples are
analyzed for dissolved inorganic nutrients including nitrate,
ammonia, phosphate, particulate organic carbon, hydrogen,
and nitrogen and fecal coliform. Seasonal plant uptake
of nitrogen is assessed through elemental analysis of
carbon, nitrogen, and hydrogen (CHN) of representative
plant tissue and measures of vegetation biomass in each
wetland cell throughout the growing season. Sediments
are sampled bi-weekly for CHN (nitrogen storage) and chlorophyll
a content. |
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| Used
to measure denitrification in selected wetland cells.
Denitrification rates are compared between wetland cells
planted with Juncus roemarianus and those without vegetation.
In addition, the sampling focuses on factors which may
regulate rates of denitrification including benthic algal
biomass (chlorophyll a), nutrient concentrations, organic
carbon content, oxygen gradients, and vegetation species
and biomass. Denitrification is quantified monthly and
intensively during runoff events. |
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