# //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: 2023-03-23 18:25:02 # //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="06191000 " TIME_ZONE="MST" DST_FLAG=Y # //STATION NAME="Gardner River near Mammoth, YNP" # //LABEL="Discharge ft^3/s" # //PARAMETER CODE="00060" # //RATING ID="16.0" TYPE="STGQ" NAME="stage-discharge" AGING=Working # //RATING REMARKS="Rating 16.0 developed by SMK due to significant scour after historical floods. An offset of 0.60 ft was chosen but will need confirmed by a GZF when the flow is in section control The top end was drawn to meas. no 712, which was an indirect using bridge constriction computations. A slope change occurs as stages increase from 3.48 to 3.62 ft going from combined section/channel control to channel control. As the stage continues to increase the flow is constricted and contained within the bridge opening. More definition is needed. Revied, JBS (3/23/2023) - Rating is approved for use. Rating shape and slope makes sense, offset is reasonable but should be confirmed by GZFs readings this year. Definition is limited, however rating is good for peak flows in 2022 and post peak flow definition. Rating is subject to change after mid-high flow definition is obtained in 2023. " # //RATING EXPANSION="logarithmic" # //RATING OFFSET1=6.000000E-01 # //RATING_INDEP ROUNDING="????" PARAMETER="Gage height (ft)" # //RATING_DEP ROUNDING="????" PARAMETER="Discharge (ft^3/s)" # //RATING_DATETIME BEGIN=20220613110000 BZONE=-07:00 END=-------------- EZONE=--- AGING=Working # //RATING_DATETIME COMMENT="Start new rating as sfhit and rating 16.0 cross at 6.05 ft- scour occurred " INDEP DEP STOR 16N 16N 1S 1.3500000E+00 2.9330000E+01 * 2.3400000E+00 3.0582000E+02 * 2.8200000E+00 5.8951000E+02 * 3.4800000E+00 1.1587700E+03 * 3.6200000E+00 1.2634700E+03 * 3.7700000E+00 1.3618300E+03 * 3.9300000E+00 1.4552000E+03 * 4.2500000E+00 1.6331000E+03 * 6.3200000E+00 2.6674900E+03 *