Water resources of Monroe County, New York, water years 1989-93, with emphasis on water quality in the Irondequoit Creek basin

Water resources of Monroe County, New York, water years 1997-99, with emphasis on water quality in the Irondequoit Creek basin—Atmospheric deposition, ground water, streamflow, trends in water quality, and chemical loads to Irondequoit Bay

“…The glacial history and geohydrology of the Irondequoit Creek valley are discussed in Kappel and Young (1989). Land use is discussed in Johnston and Sherwood (1996) and Sherwood (1999).…”

“…Occasionally, this flow adjustment is unsuccessful; if so, the trend is reported as a trend in unadjusted concentrations. The techniques used for addressing the effects of seasonal variation, streamflow variation, missing values, and censored data on trend analysis are discussed in detail in Johnston and Sherwood (1996) and Sherwood (1999).…”

“…19), are a result of the improved phosphorus removal capabilities of the wastewater-treatment plant up stream of the sampling site. In August of 1995 the Spencerport treatment plant began adding iron salts to improve the removal of phosphorus from treatmentplant effluent (Sherwood, 1999). Four significant trends were also noted in constituent concentrations in the Genesee River.…”

“…During water years 1 1980-81, the USGS National Urban Runoff Program (NURP) study of the Johnston and Sherwood (1996), those for water years 1989-93 are given in Sherwood (1999), and those for water years 1994-96 are given in Sherwood (2000).…”

Effects of a Cattail Wetland on Water Quality of Irondequoit Creek near Rochester, New York

“…Samples collected on September 18, 1991, andOctober 20, 1993, were divided into eight equal parts (split samples), and four subsamples were analyzed by each laboratory for dissolved or total ammonia-plusorganic nitrogen, nitrate-plus-nitrite, and total phosphorus. The results of paired t-tests, conducted on the analytical data from samples collected at all USGS stations in the Monroe County monitoring network to identify statistically significant differences between the two laboratories for specific constituents, are given in Sherwood (1997). Of the samples collected on September 18, 1991, only nitrate-plus-nitrite concentrations differed significantly between the two laboratories, and of the samples collected on October 20, 1993, only total ammonia-plus-organic nitrogen and total phosphorus concentrations showed significant differences.…”