10254670 ALAMO RIVER AT DROP NO. 3, NEAR CALIPATRIA, CA
LOCATION.-Lat 33°06'16", long 115°32'39", on line between secs.19 and 20, T.12 S., R.14 E., Imperial
County, Hydrologic Unit 18100200, on right bank, 2.2 mi southwest of Calipatria.
PERIOD OF RECORD.-October 1979 to current year. Records prior to October 1979 in files of the Imperial
Irrigation District.
CHEMICAL DATA: Water years 1969-70, 1975-77, 1979-94.
BIOLOGICAL DATA: Water years 1979-81.
SPECIFIC CONDUCTANCE: Water years 1969-70, 1975-77, 1979-84.
WATER TEMPERATURE: Water years 1969-70, 1975-77, 1979-84.
SEDIMENT DATA: Water years 1979-94.
REVISED RECORDS.-WDR CA-95-1: 1993(M).
GAGE.-Water-stage recorder and broad-crested weir. Elevation of gage is 185 ft below sea level, from topographic
map.
REMARKS.-Records excellent except for estimated daily discharges, which are poor. Flow is mainly return from
irrigated areas. See schematic diagram of Salton Sea Basin.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 5,980 ft3/s, Mar. 27, 1992, gage height, 6.56 ft,
from rating curve extended above 1,000 ft3/s; maximum gage height, 7.20 ft, Jan. 17, 1993 (affected by
backwater); minimum daily, 259 ft3/s, Jan. 2, 1985.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 779 739 564 605 557 768 843 968 784 710 589 655
2 783 763 596 533 589 778 962 1010 769 729 566 635
3 780 721 593 537 602 812 880 874 756 728 555 618
4 755 747 549 554 619 801 716 908 772 714 573 627
5 721 765 555 573 712 793 524 853 742 722 630 627
6 731 756 551 592 614 813 628 840 749 744 632 610
7 731 727 516 593 596 788 752 873 739 795 650 602
8 766 704 529 668 548 762 795 886 724 749 658 550
9 815 625 521 720 495 788 826 834 717 826 605 640
10 808 639 515 664 482 803 840 826 692 787 635 677
11 779 639 553 571 479 808 827 848 701 760 600 699
12 769 743 573 573 513 792 804 865 724 662 588 692
13 744 704 605 568 528 782 830 862 741 e1100 643 658
14 771 695 532 592 555 776 846 865 769 796 634 645
15 753 720 569 616 558 767 859 871 778 647 628 683
16 748 636 597 644 595 773 863 846 763 599 606 703
17 738 604 595 689 637 834 881 796 757 574 626 717
18 747 611 605 613 677 883 849 813 772 544 629 733
19 738 624 620 593 735 843 823 825 799 534 640 752
20 746 646 615 604 692 830 862 842 760 563 616 680
21 756 633 625 572 719 812 869 865 757 646 691 710
22 771 615 671 591 738 812 852 835 725 671 673 790
23 772 591 694 597 726 842 864 832 754 673 639 893
24 756 603 701 599 763 854 872 808 759 712 650 837
25 755 637 552 601 786 844 894 804 769 720 658 748
26 664 628 398 612 793 875 905 792 753 702 664 671
27 697 562 474 648 798 840 928 783 712 640 654 661
28 710 557 567 613 793 826 897 758 697 684 592 681
29 722 531 588 593 --- 820 909 764 725 726 581 691
30 766 508 594 646 --- 778 914 723 744 725 590 692
31 744 --- 641 679 --- 766 --- 754 --- 658 614 ---
TOTAL 23315 19673 17858 18853 17899 25063 25114 26023 22403 21840 19309 20577
MEAN 752 656 576 608 639 808 837 839 747 705 623 686
MAX 815 765 701 720 798 883 962 1010 799 1100 691 893
MIN 664 508 398 533 479 762 524 723 692 534 555 550
AC-FT 46250 39020 35420 37390 35500 49710 49810 51620 44440 43320 38300 40810
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1980 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 779 667 549 528 601 824 954 842 704 700 705 726
MAX 895 809 666 640 718 947 1208 1000 888 888 846 847
(WY) 1992 1991 1991 1993 1991 1995 1994 1994 1994 1994 1994 1994
MIN 655 569 379 392 445 697 812 706 515 556 593 632
(WY) 1982 1982 1986 1995 1980 1987 1986 1982 1982 1982 1982 1986
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1980 - 1999
ANNUAL TOTAL 262077 257927
ANNUAL MEAN 718 707 715
HIGHEST ANNUAL MEAN 833 1994
LOWEST ANNUAL MEAN 628 1982
HIGHEST DAILY MEAN 1030 Mar 26 1100 Jul 13 4670 Mar 27
1992
LOWEST DAILY MEAN 336 Feb 23 398 Dec 26 259 Jan 2
1985
ANNUAL SEVEN-DAY MINIMUM 351 Feb 19 514 Feb 8 277 Dec 31
1984
INSTANTANEOUS PEAK FLOW (a)1400 Jul 13 5980 Mar 27
1992
INSTANTANEOUS PEAK STAGE (a)3.45 Jul 13 (a)7.20 Jan 17
1993
ANNUAL RUNOFF (AC-FT) 519800 511600 518200
10 PERCENT EXCEEDS 913 846 925
50 PERCENT EXCEEDS 739 717 706
90 PERCENT EXCEEDS 516 567 511
(a) Affected by backwater.
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