# //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: 2023-11-15 01:11:02 # //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="06205000 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Stillwater River near Absarokee, MT" # //LABEL="Discharge ft^3/s" # //PARAMETER CODE="00060" # //RATING ID="23.0" TYPE="STGQ" NAME="stage-discharge" AGING=Working # //RATING REMARKS="Developed due to the significant scour from historic 2022 floods which caused significant scour on the lower and mid ranges and fill on hte upper end. No GZF's were made after the flood, thus an offset of 0 was chosen based on fit. The lower end has a slope of 2.182, which is section control as indicated by meas. nos. 884-886. The slope above stages of 2.83 changes to 1.943 which is channel control. The rating was drawn to meas. no 879 which was an indirect. More definition is needed. " # //RATING EXPANSION="logarithmic" # //RATING OFFSET1=0.000000E+00 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20220612070000 BZONE=-07:00 END=-------------- EZONE=--- AGING=None # //RATING_DATETIME COMMENT="New Rating for historic flooding June 2022. Upper end extended above Indirect Meas. 879 to 10.89 ft and 18,200 cfs. Intermediate and lower portions defined by recent measurments post flood. A straightline relationship used until more data becomes available. Temporary scour indicated by Meas. 880 on upper end during flood peak but not given full weight for rating defintion. Offset selected at based on past GZF measurements but some channel scour occurred after the flood event" INDEP DEP STOR 16N 16N 1S 6.0000000E-01 4.4930000E+01 * 2.8300000E+00 1.3247700E+03 * 1.0860000E+01 1.8077700E+04 *