To summarize, the changes between the originally released and these updated Detroit Lake models include:

1.  Corrections to latitude/longitude values, and removal of intermittent data gaps from 2003 QWD file.  
    After these changes, the original and changed model outputs were compared, and showed negligable differences.

2.  Then, the Big Cliff model development and calibration led to some modifications of the Detroit Lake 
    model release setup.  These changes, along with use of an updated CE-QUAL-W2 executable resulted in some 
    more significant changes in the Detroit Lake calibration, especially for temperature.  The rationale 
    behind and details of these modifications were documented in Appendix A of Buccola and others (2012).  
    Error statistics for these updated models were calculated and included with this download. The error 
    statistics table is comparable to Table 3 in the report released with the original model (Sullivan and 
    others, 2007).


References:
  Buccola, N.L., Rounds, S.A., Sullivan, A.B., and Risley, J.C., 2012, Simulating potential structural 
    and operational changes for Detroit Dam on the North Santiam River, Oregon, for downstream temperature 
    management: U.S. Geological Survey Scientific Investigations Report 2012-5231, 68 p.
    http://pubs.usgs.gov/sir/2012/5231/

  Sullivan, A.B., Rounds, S.A., Sobieszczyk, S., and Bragg, H.M., 2007, Modeling hydrodynamics, water 
    temperature, and suspended sediment in Detroit Lake, Oregon: U.S. Geological Survey Scientific 
    Investigations Report 2007-5008, 40 p.
    http://pubs.usgs.gov/sir/2007/5008/