Flux of Nitrogen, Phosphorous, and Suspended ... …
Concentrations of nitrogen, phosphorus, and suspended sediment are measured at the U.S. Geological Survey streamgage at Conowingo Dam at the downstream end of the Susquehanna River Basin in Maryland, where the river flows into the Chesapeake Bay. During the period September 7–15, 2011, in the aftermath of Tropical Storm Lee, concentrations of these three constituents were among the …
Flux of Nitrogen, Phosphorus, and Suspended ... - …
Concentrations of nitrogen, phosphorus, and suspended sediment are measured at the U.S. Geological Survey streamgage at Conowingo Dam at the downstream end of the Susquehanna River Basin in Maryland, where the river flows into the Chesapeake Bay. During the period September 7–15, 2011, in the aftermath of Tropical Storm Lee, concentrations of these three constituents were among the …
Flux of Nitrogen, Phosphorus, and Suspended …
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Flux of nitrogen, phosphorus, and suspended …
Concentrations of nitrogen, phosphorus, and suspended sediment are measured at the U.S. Geological Survey streamgage at Conowingo Dam at the downstream end of the Susquehanna River Basin in Maryland, where the river flows into the Chesapeake Bay. During the period September 7-15, 2011, in the aftermath of Tropical Storm Lee, concentrations of these three constituents were among the highest ...
Trends in streamflow and concentrations and flux …
The U.S. Geological Survey (USGS), in cooperation with The Nature Conservancy, completed a study to estimate and assess trends in streamflow and annual mean concentrations and flux of nutrients (nitrate plus nitrite, total Kjeldahl nitrogen, and total phosphorus) and total suspended solids at three USGS streamgages (hereafter referred to as “study gages”) on the Upper White River at Muncie (USGS …
Controls on nitrogen flux in alpine/subalpine ... - …
High‐altitude watersheds in the Front Range of Colorado show symptoms of advanced stages of nitrogen excess, despite having less nitrogen in atmospheric deposition than other regions where watersheds retain nitrogen. In two alpine/subalpine subbasins of the Loch Vale watershed, atmospheric deposition of NO3− plus NH4+ was 3.2–5.5 kg N ha−1, and watershed export was 1.8–3.9 kg N ha ...
Concentration, flux, and the analysis of trends of …
USGS Numbered Series: Title: Concentration, flux, and the analysis of trends of total and dissolved phosphorus, total nitrogen, and chloride in 18 tributaries to Lake Champlain, Vermont and New York, 1990–2011: Series title: Scientific Investigations Report: Series number: 2013-5021: DOI: 10.3133/sir20135021: Year Published: 2013: Language: English: Publisher
Nutrient Flux for the Mississippi River Basin and …
Nitrogen in the Mississippi Basin Estimating Sources and Predicting Flux to the Gulf of Mexico: USGS Fact Sheet 135-00; Nutrients in the Upper Mississippi River: Scientific Information to Support Management Decisions: USGS Fact Sheet 105-03; USGS Home Water Climate Change Science Systems Ecosystems Energy and Minerals Environmental Health Hazards
USGS Open-File Report 2014–1209: …
The flux bias statistic, an indicator of the ability of the Weighted Regressions on Time, Discharge, and Season regression models to provide accurate representations of flux, showed acceptable bias (less than ±10 percent) for 68 out of 72 models for total and dissolved phosphorus, total nitrogen, and chloride. Six out of 18 models for total suspended solids had moderate bias (between 10 and ...
Nitrogen in the Mississippi Basin ... - pubs.usgs.gov
total nitrogen flux to the Gulf (1.57 million metric tons) was from nonpoint sources, and the remaining 11 percent was from municipal and industrial point sources. The estimated contributions of both nitrate and total nitrogen from specific sources are given table 1. Alexander and others (2000) obtained similar values for total nitrogen flux to the
Nitrogen flux and sources in the Mississippi River …
The mean annual N flux has changed little since the early 1980s, but large year-to-year variations in N flux occur because of variations in precipitation. During wet years the N flux can increase by 50% or more due to flushing of nitrate that has accumulated in the soils and unsaturated zones in the basin. The principal source areas of N are basins in southern Minnesota, Iowa, Illinois, Indiana, and Ohio that …
Streamflow and Nitrogen, Phosphorus, and Silica Flux at ...
Streamflow and Nitrogen, Phosphorus, and Silica Flux at Selected Sites in the Mississippi River Basin, 1980-2005 William Battaglin, USGS, Lakewood, CO and Brent Aulenbach, USGS, Atlanta, GA. Research Question Nutrient Task Force Action Plan Short-term Action 11 zBy 12/2005, and every five years thereafter, the Task Force will assess the nutrient load reductions achieved and response of the ...
Flux of Nitrogen, Phosphorus, and Suspended Sediment from ...
Flux of Nitrogen, Phosphorus, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay during Tropical Storm Lee, September 2011, as an Indicator of the Effects of Reservoir Sedimentation on Water Quality . Cover. View of the Conowingo Dam on the Susquehanna River in the aftermath of Tropical Storm Lee. Photo taken at 4:30 p.m., September 12, 2011. Discharge at time of …
USGS Scientific Investigations Report 2013–5021 ...
Total nitrogen concentration and flux for most of the monitored tributaries in the Lake Champlain Basin have decreased since 1990. Between 1990 and 2010, flow-normalized total nitrogen flux decreased by 386 t/yr, which reflects an increase of 440 t/yr between 1990 and 2000 and a decrease of 826 t/yr between 2000 and 2010. All individual tributaries except the Winooski River had decreases in total …
USGS SIR 2006-5078: Concentrations, Fluxes, and …
Comparison of Flux Estimates with Previous Studies Nitrogen Phosphorus Suspended Sediment and Suspended Solids Summary References Cited For more information contact the lead author Paul Terrio. Or. Science Center Director USGS Illinois Water Science Center 1201 W. University Ave. Suite 100 Urbana, IL 61801
USGS Open-File Report 2007-1080 - Discussion of …
Likewise, most of the net flux of total nitrogen is from the the Upper Mississippi and Ohio/Tennessee subbasins (fig. 3), representing 39 percent and 34 percent of the total MARB flux for the 1981–2005 period, respectively. Generally, dissolved nitrite plus nitrate makes up about two-thirds of the total nitrogen flux. Note that a negative net flux is observed for the Lower Mississippi ...
SOFIA - Water Flow and Nutrient Flux from Five ...
Total residual nitrogen flux from the five river stations was about 1,280 short tons for August 1999 through January 2000, the highest flow period during the study. Total residual phosphorus flux from the five river stations was about 17 short tons for the same period, reflecting the low total phosphorus concentrations measured in the five rivers. Figure 9. (above) Southwest coast stations ...
USGS Open-File Report 2007-1080 - Sources and …
Report Site Map > Sources and Preparation of Data Used for Nutrient Flux Estimation. USGS Open-File Report 2007-1080 - Streamflow and Nutrient Fluxes of the Mississippi-Atchafalaya River Basin and Subbasins for the Period of Record Through 2005 Sources and Preparation of Data Used for Nutrient Flux Estimation. Flux estimation uses daily streamflow data and nutrient concentrations from analysis ...
Graphics of Streamflow and Nutrient Flux for the …
USGS Open-File Report 2007-1080 - Streamflow and Nutrient Fluxes of the Mississippi-Atchafalaya River Basin and Subbasins for the Period of Record Through 2005 Graphics of Streamflow and Nutrient Flux for the Allegheny River at New Kensington, Pennsylvania. The following graphics depict annual flux of dissolved nitrite plus nitrate (figure 1), total nitrogen (figure 2), total phosphorus ...
Erik Arndt - Humboldt State University - Arcata ...
We estimated nitrogen inputs to the watershed using the net anthropogenic nitrogen input (NANI) method, and estimated N flux both using the USGS load estimation program LOADEST and as …