Joseph Domagalski (Former Employee)
Science and Products
Filter Total Items: 59
Sources and transport of phosphorus to rivers in California and adjacent states, U.S., as determined by SPARROW modeling Sources and transport of phosphorus to rivers in California and adjacent states, U.S., as determined by SPARROW modeling
The SPARROW (SPAtially Referenced Regression on Watershed attributes) model was used to simulate annual phosphorus loads and concentrations in unmonitored stream reaches in California, U.S., and portions of Nevada and Oregon. The model was calibrated using de-trended streamflow and phosphorus concentration data at 80 locations. The model explained 91% of the variability in loads and 51%...
Authors
Joseph L. Domagalski, Dina Saleh
SPARROW modeling of nitrogen sources and transport in rivers and streams of California and adjacent states, U.S. SPARROW modeling of nitrogen sources and transport in rivers and streams of California and adjacent states, U.S.
The SPARROW (SPAtially Referenced Regressions On Watershed attributes) model was used to evaluate the spatial distribution of total nitrogen (TN) sources, loads, watershed yields, and factors affecting transport and decay in the stream network of California and portions of adjacent states for the year 2002. The two major TN sources to local catchments on a mass basis were fertilizers and...
Authors
Dina Saleh, Joseph L. Domagalski
Phosphorus and groundwater: Establishing links between agricultural use and transport to streams Phosphorus and groundwater: Establishing links between agricultural use and transport to streams
Phosphorus is a highly reactive element that is essential for life and forms a variety of compounds in terrestrial and aquatic ecosystems. In water, phosphorus may be present as the orthophosphate ion (PO43-) and is also present in all life forms as an essential component of cellular material. In natural ecosystems, phosphorus is derived from the erosion of rocks and is conserved for...
Authors
Joseph L. Domagalski, Henry Johnson
Comparison of two parametric methods to estimate pesticide mass loads in California's Central Valley Comparison of two parametric methods to estimate pesticide mass loads in California's Central Valley
Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2) the Sine Wave model, in which first-order Fourier series sine and cosine terms are...
Authors
Dina K. Saleh, David L. Lorenz, Joseph L. Domagalski
Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California's Central Valley Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California's Central Valley
Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2) the Sine Wave model, in which first-order Fourier series sine and cosine terms are...
Authors
D.K. Saleh, D. L. Lorenz, Joseph L. Domagalski
Trends in pesticide concentrations in streams of the western United States, 1993-2005 Trends in pesticide concentrations in streams of the western United States, 1993-2005
Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s‐ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions...
Authors
Henry M. Johnson, Joseph L. Domagalski, Dina Saleh
Science and Products
Filter Total Items: 59
Sources and transport of phosphorus to rivers in California and adjacent states, U.S., as determined by SPARROW modeling Sources and transport of phosphorus to rivers in California and adjacent states, U.S., as determined by SPARROW modeling
The SPARROW (SPAtially Referenced Regression on Watershed attributes) model was used to simulate annual phosphorus loads and concentrations in unmonitored stream reaches in California, U.S., and portions of Nevada and Oregon. The model was calibrated using de-trended streamflow and phosphorus concentration data at 80 locations. The model explained 91% of the variability in loads and 51%...
Authors
Joseph L. Domagalski, Dina Saleh
SPARROW modeling of nitrogen sources and transport in rivers and streams of California and adjacent states, U.S. SPARROW modeling of nitrogen sources and transport in rivers and streams of California and adjacent states, U.S.
The SPARROW (SPAtially Referenced Regressions On Watershed attributes) model was used to evaluate the spatial distribution of total nitrogen (TN) sources, loads, watershed yields, and factors affecting transport and decay in the stream network of California and portions of adjacent states for the year 2002. The two major TN sources to local catchments on a mass basis were fertilizers and...
Authors
Dina Saleh, Joseph L. Domagalski
Phosphorus and groundwater: Establishing links between agricultural use and transport to streams Phosphorus and groundwater: Establishing links between agricultural use and transport to streams
Phosphorus is a highly reactive element that is essential for life and forms a variety of compounds in terrestrial and aquatic ecosystems. In water, phosphorus may be present as the orthophosphate ion (PO43-) and is also present in all life forms as an essential component of cellular material. In natural ecosystems, phosphorus is derived from the erosion of rocks and is conserved for...
Authors
Joseph L. Domagalski, Henry Johnson
Comparison of two parametric methods to estimate pesticide mass loads in California's Central Valley Comparison of two parametric methods to estimate pesticide mass loads in California's Central Valley
Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2) the Sine Wave model, in which first-order Fourier series sine and cosine terms are...
Authors
Dina K. Saleh, David L. Lorenz, Joseph L. Domagalski
Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California's Central Valley Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California's Central Valley
Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2) the Sine Wave model, in which first-order Fourier series sine and cosine terms are...
Authors
D.K. Saleh, D. L. Lorenz, Joseph L. Domagalski
Trends in pesticide concentrations in streams of the western United States, 1993-2005 Trends in pesticide concentrations in streams of the western United States, 1993-2005
Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s‐ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions...
Authors
Henry M. Johnson, Joseph L. Domagalski, Dina Saleh