The U.S. Geological Survey (USGS) and the Federal Highway Administration (FHWA) are currently cooperating in a national project to evaluate FHWA's highway-runoff quality planning model. The FHWA wants to update the 1990 FHWA highway runoff quality model to reflect changes in runoff quality and to address the importance of upstream recieving-water concentrations for assessing the potential effects of runoff in these recieving waters. The FHWA wants a catalog of existing studies and available data that can be used to quantitatively predict the potential for adverse effects from highway-runoff discharge. Information collected will be used to determine if available data are sufficient to characterize pollutant loadings and impacts attributable to highway stormwater runoff around the country. The new model will use monte-carlo methods to quantify the effects of precipitation characteristics, streamflow, estimated runoff quanity and quality, and best management practices on the probability distribution of recieving-water concentrations. This web page will provide a catalog of reports, and other information as it becomes available.

FHWA Natural Environment Web Page

This effort is an update of the FHWA 1990 model, which is now available here

This effort is an offshoot of the National Highway Runoff Water-Quality Data and Methodology Synthesis

Project Products

Granato, G.E., 2006, Kendall-Theil Robust Line (KTRLine--version 1.0)—A visual basic program for calculating and graphing robust nonparametric estimates of linear-regression coefficients between two continuous variables: Techniques and Methods of the U.S. Geological Survey, book 4, chap. A7, 31 p.Report On-Line Software On-Line

For questions, comments, additions or suggestions contact:
Gregory Granato