Ohio Department of Natural Resources, Division of Wildlife, Reservoir Productivity Assessment Water Chemistry 2006-2007

Limnological data provided represent information collected during 2006–2007 for a total of 153 reservoirs. Some reservoirs were sampled in a single year, others were sampled in both years. Nearly all reservoirs were sampled during July or August near the dam at the deepest part of the reservoir. Additional samples for particular systems were taken in other months and at other sites (i.e., near the inflow). Many samples have complete Secchi transparencies, suspended solids (both total and non-volatile suspended solids), total phosphorus, total nitrogen, and chlorophyll a concentrations. Others are missing various parameters; some samples are represented by only a Secchi transparency measurement. Morphometric data and landuse/land cover data are provided for those systems where it had been previously compiled. All 153 reservoirs are represented in the provided lake shapefile whereas only 117 were included in the watershed shapefile. ' Over a 2-year period (2006 and 2007) we sampled 109 reservoirs (all Ohio reservoiurs > 10 ha), located throughout Ohio, USA, whose watersheds contain a variety of land cover types and a wide range of eutrophication levels. All reservoirs were sampled at least once during July or August in 2006 or 2007. … a subset of 34 of these reservoirs were sampled once in both 2006 and 2007. In addition, 10 reservoirs (“reference reservoirs”) were sampled at least once per month during July and August of both 2006 and 2007. Lakes were sampled by Miami personnel and DOW field crews (Districu3, District 4, and District 5).’