10254730 ALAMO RIVER NEAR NILAND, CA

LOCATION.-Lat 33°11'56", long 115°35'46", in SW 1/4 NW 1/4 sec.23, T.11 S., R.13 E., Imperial County, Hydrologic Unit 18100200, on left 
  bank 1.0 mi upstream from mouth and 4.5 mi southwest of Niland. 
PERIOD OF RECORD.-January 1943 to September 1960 (monthly discharge only, published in WSP 1743), October 1960 to current year. 
GAGE.-Acoustic-velocity meter and water-stage recorder.  Elevation of gage is 220 ft below sea level, from topographic map.  Prior to Oct. 1, 
  1986, at site 0.4 mi downstream at different datum. 
REMARKS.-Records good.  Discharge mainly represents seepage and return flow from irrigated areas.  See schematic diagram of Salton Sea 
  Basin. 
COOPERATION.-Gage-height record provided by Imperial Irrigation District for the following dates: Sept. 25, 26.
EXTREMES FOR PERIOD OF RECORD.-Maximum daily discharge, 4,500 ft3/s, Aug. 17, 1977, estimated by Imperial Irrigation District; 
  minimum daily, 288 ft3/s, Jan. 2, 1966, Dec. 15, 1984. 

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997

                                               DAILY MEAN VALUES
 
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
  1       967      877      684      636      826      968     1020     1150      932      857      968      872
  2       986      894      704      572      774     1010     1130     1180      895      871     1020      874
  3      1010      837      677      606      736      987     1180     1170      872      913      987      907
  4       976      804      692      648      803      939     1210     1170      892      895      996      885
  5      1010      759      717      614      870      884     1280     1080      859      901      940      839
  6       939      792      758      630      882      968     1240     1130      925      929      959      878
  7       864      789      753      648      921     1040     1040     1110     1010      927      996      959
  8       889      783      710      624      926     1040     1050     1160      978      925      937      913
  9       936      803      731      673      789      987     1070     1060      920      939      940      875
 10       936      773      745      759      717      959     1110     1020      826      916      909      959
 
 11       987      752      711      744      748      978     1180      987      840      927      805      996
 12       978      770      734      763      777     1040     1150      909      873      926      865      940
 13       940      796      770      800      789     1060     1150      914      904      935      934      919
 14       909      863      767      711      792     1050     1180      959      914      922      949      987
 15       940      853      757      627      764     1090     1180      996      886      949      949     1120
 16       936      815      723      584      760     1080     1160     1020      880      978      949     1020
 17       949      791      729      611      705     1060     1190     1030      841      968      926      911
 18       892      796      803      584      742     1050     1210     1020      796      987      833      896
 19       881      837      806      562      791     1060     1220     1020      847      996      854      922
 20       857      839      807      502      797     1090     1210      978      870     1020      892      922
 
 21       803      797      792      517      880     1160     1170      968      881     1010      916      920
 22       756      786      815      560      886     1200     1140      987      905      996      940      969
 23       798      761      773      594      882     1220     1160     1010      877      996      932      978
 24       880      742      788      661      837     1070     1160      949      835     1070      949     1030
 25       867      680      664      732      849     1080     1130      898      841     1030      839     1720
 26       830      671      515      734      978     1060     1120      854      876      978      889     1600
 27       848      730      548      724      959     1040     1100      917      903      907      865      998
 28       817      710      656      763      916     1110     1090      904      903      918      890      795
 29       792      698      681      747      ---     1160     1110      890      866      897      883      675
 30       834      659      703      761      ---     1180     1130      879      863      968      940      661
 31       877      ---      683      753      ---     1070      ---      933      ---      987      931      ---
 
TOTAL   27884    23457    22396    20444    23096    32690    34470    31252    26510    29438    28582    28940
MEAN      899      782      722      659      825     1055     1149     1008      884      950      922      965
MAX      1010      894      815      800      978     1220     1280     1180     1010     1070     1020     1720
MIN       756      659      515      502      705      884     1020      854      796      857      805      661
AC-FT   55310    46530    44420    40550    45810    64840    68370    61990    52580    58390    56690    57400
 



STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1997, BY WATER YEAR (WY)                                 

          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

MEAN      947      760      641      639      762      975     1090      959      822      827      845      903
MAX      1159      851      792      834      970     1144     1272     1182      981     1027     1278     1271
(WY)     1964     1991     1973     1972     1964     1963     1980     1975     1963     1963     1977     1962
MIN       742      616      416      396      495      734      797      684      646      636      656      667
(WY)     1986     1966     1986     1978     1993     1987     1965     1964     1964     1985     1986     1992
 
SUMMARY STATISTICS           FOR 1996 CALENDAR YEAR        FOR 1997 WATER YEAR           WATER YEARS 1961 - 1997
 
ANNUAL TOTAL                      312688                     329159                                             
ANNUAL MEAN                          854                        902                        848                  
HIGHEST ANNUAL MEAN                                                                        991              1963
LOWEST ANNUAL MEAN                                                                         680              1986
HIGHEST DAILY MEAN                  1170     Apr 28            1720     Sep 25            4500       Aug 17 1977
LOWEST DAILY MEAN                    454     Jan  2             502     Jan 20             288       Jan  2 1966
ANNUAL SEVEN-DAY MINIMUM             607     Jan  1             560     Jan 16             323       Dec 27 1965
ANNUAL RUNOFF (AC-FT)             620200                     652900                     614100                  
10 PERCENT EXCEEDS                  1080                       1110                       1110                  
50 PERCENT EXCEEDS                   847                        903                        840                  
90 PERCENT EXCEEDS                   685                        705                        606