Availability of Open-File Report 93-39, "Procedures for Adjusting Regional Regression Models of Urban-Runoff Quality Using Local Data,"



In Reply Refer To:                                   June 14, 1993
Mail Stop 415




OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 93.18

SUBJECT:  Availability of Open-File Report 93-39, "Procedures for
          Adjusting Regional Regression Models of Urban-Runoff
          Quality Using Local Data," by Anne B. Hoos and
          Joy K. Sisolak

The purpose of this memorandum is to announce the availability of 
Open-File Report 93-39 and to make a limited distribution.  
Because of plans to publish it as a Water-Supply Paper, only a 
limited number of the report were printed.  Hence, only one copy 
each is being sent to regional, district, and major subdistrict 
offices.  This copy should be brought to the attention of project 
leaders working in the field of urban stormwater quality.  
Additional copies are available from the Tennessee District by 
contacting the principal author, Anne B. Hoos, or the District 
Chief by EDOC or by calling (615) 736-5424.

The report, funded by the Office of Surface Water, discusses 
methods for using local data to adjust regional regression models 
for predicting stormwater quality at unmonitored sites.  The 
regional regression models are those published in Water-Supply 
Paper 2363, "Techniques for Estimation of Storm-Runoff Loads, 
Volumes, and Selected Constituent Concentrations in Urban 
Watersheds in the United States," by N. E. Driver and
G. D. Tasker.  The methods for adjusting the models were tested 
using data from Denver, Colorado; Bellevue, Washington; and 
Knoxville, Tennessee.  Use of these methods permits more 
statistically accurate prediction of water-quality parameters than 
would be possible with either the regional regression models or a 
limited local data set, used separately.  Software to implement 
these methods is available from the principal author.

A number of Water Resources Division offices have cooperative 
programs with local governments to evaluate stormwater quality as 
part of the Environmental Protection Agency's NPDES (National 
Pollution Discharge Elimination System).  The methods from Open-
File Report 93-39 will be useful in these programs and may be 
useful in similar studies, such as the Army Stormwater Runoff 
Program.




                                 Charles W. Boning, Chief
                                 Office of Surface Water

Attachment

DISTRIBUTION:  A, B, FO, PO (w/o attachment)
               FO (1 copy only of attachment)