# //UNITED STATES GEOLOGICAL SURVEY http://water.usgs.gov/ # //NATIONAL WATER INFORMATION SYSTEM http://water.usgs.gov/data.html # //DATA ARE PROVISIONAL AND SUBJECT TO CHANGE UNTIL PUBLISHED BY USGS # //RETRIEVED: 2024-06-10 22:35:01 # //WARNING # //WARNING The stage-discharge rating provided in this file should be # //WARNING considered provisional and subject to change. Stage-discharge # //WARNING ratings change over time as the channel features that control # //WARNING the relation between stage and discharge vary. Users are # //WARNING cautioned to consider carefully the applicability of this # //WARNING rating before using it for decisions that concern personal or # //WARNING public safety or operational consequences. # //FILE TYPE="NWIS RATING" # //DATABASE NUMBER=01 DESCRIPTION=" Standard data base for this site." # //STATION AGENCY="USGS " NUMBER="06207500 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Clarks Fork Yellowstone River nr Belfry MT" # //LABEL="Discharge ft^3/s" # //PARAMETER CODE="00060" # //RATING ID="16.0" TYPE="STGQ" NAME="stage-discharge" AGING=Working # //RATING REMARKS="scour occurred at mid/low stages. Rating was developed using -.0.06 offset, based on most recent GZF. Section/combined control conditions are indicated up just above 6.22 ft. Channel control exists at stages above. Overbank occurs above 11.56 ft. A breakpoint occurs at 6.22 when a large slope change occurs. Reviewed, JBS (6/10/2024) - Justification for new rating is based on scour at medium range flows. The offset for the lower end looks good as selected. A second offset was applied at 6.22 ft, it does not appear this was necessary but also doesn't have a negative effect on the rating. The bottom end of the rating covers all stages since scour occurred from the 2022 event. I agree with not extending the upper end any further than it already was, 2X measurement #936 would have been too much. Rating is approved for use. " # //RATING EXPANSION="logarithmic" # //RATING BREAKPOINT1=6.220000E+00 # //RATING OFFSET1=-6.000000E-01 OFFSET2=-1.000000E+00 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20240117120000 BZONE=-07:00 END=-------------- EZONE=--- AGING=Working # //RATING_DATETIME COMMENT="put into effect during ice period" INDEP DEP STOR 16N 16N 1S 3.6000000E-01 9.2810000E+01 * 4.2100000E+00 3.4560000E+03 * 6.1900000E+00 6.9499100E+03 * 6.2200000E+00 7.0057100E+03 * 6.3900000E+00 7.2824400E+03 * 7.5500000E+00 9.1325400E+03 * 9.2600000E+00 1.2259010E+04 * 1.0840000E+01 1.6026790E+04 * 1.1980000E+01 1.9527130E+04 * 1.2660000E+01 2.4365290E+04 *