USGS Water Resources Applications Software: LOADEST
Documentation for the LOADEST software package is provided in the following report:
 
    Runkel,
    R.L., Crawford, C.G., and Cohn, T.A., 2004, Load
    Estimator (LOADEST): A FORTRAN Program for Estimating
    Constituent Loads in Streams and Rivers: U.S.
    Geological Survey Techniques and Methods Book 4, Chapter A5, 69
    p.
    HTML |  PDF (776 K) | Errata
 PDF (776 K) | Errata
Runkel,
    R.L., 2013, Revisions to LOADEST, April 2013
     PDF (776 K)
 PDF (776 K) 
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) requires Adobe Reader or an alternate PDF viewer.
IMPORTANT NOTE: LOADEST can produce biased load estimates when the selected model is a poor representation of the relationship between load and the explanatory variables. Problems with load bias may be identified through careful analyses of model residuals. LOADEST has therefore been modified since its initial release to include several features that facilitate residual analysis and bias identification. This updated version of the software was placed on the web site on March 27, 2013. LOADEST users who downloaded the software prior to this date are encouraged to download the updated version. A summary of the software update is provided here.