Tammy M Zimmerman

Site-specific multiple linear regression models were developed for one beach in Ohio (three discrete sampling sites) and one beach in Pennsylvania to estimate concentrations of Escherichia coli (E. coli) or the probability of exceeding the bathing-water standard for E. coli in recreational waters used by the public. Traditional culture-based methods are commonly used to estimate concentrations of fecal indicator bacteria, such as E. coli; however, results are obtained 18 to 24 hours post sampling and do not accurately reflect current water-quality conditions. Beach-specific mathematical models use environmental and water-quality variables that are easily and quickly measured as surrogates to estimate concentrations...

Categories: Data; Tags: Environmental Health, Great Lakes, New York, Ohio, Pennsylvania, All tags... USGS Science Data Catalog (SDC), Water Quality, bacteria, economy, regression analysis, surface water (non-marine), water quality, Fewer tags

Model archive summary report with associated data files, model report, and Virtual Beach model file for 2 models for predicting Escherichia coli (E. coli) concentration action-level exceedances.

This page contains model archive summary (MAS) packages for 2 site-specific multiple linear regression models developed for one site in Ohio and one site in Pennsylvania. Sites models contain real-time factors that are used to predict Escherichia coli (E. coli) concentration action-level exceedances. Each model package contains a MAS report, the “original” data that include all explanatory variables used in model development, the “calibration” data that only contain the chosen model variables and can be used to re-create the model, the Virtual Beach (software used to the develop the model) project file for the model, and the model report that lists parameter and model details.

Compilation of multi-agency water temperature observations for streams within the Chesapeake Bay watershed

This data release collates stream water temperature observations across the Chesapeake Bay watershed from the USGS National Water Information System (NWIS), Water Quality Portal (WQP) and the USGS Aquarius (AQ) Time-Series database. Data retrieved from NWIS consists of aggregate (minimum, maximum and mean) daily values and continuous data from USGS monitoring stations. Values from the WQP contain discrete data from multiple agencies. The dataset compiled from AQ includes miscellaneous stream temperature observations collected during discharge measurements. This stream temperature data release was completed to support the USGS goal to make scientific data publicly usable, easily discoverable, and widely available....

Categories: Data; Tags: Chesapeake Bay Watershed, Delaware, District of Columbia, Hydrology, Hydrology, All tags... Maryland, New York, Pennsylvania, USGS Science Data Catalog (SDC), Virginia, Water Quality, Water Resources, Water resources, Water temperature, West Virginia, environment, health, Fewer tags