10255550 NEW RIVER NEAR WESTMORLAND, CA
LOCATION.-Lat 33°06'17", long 115°39'49", in SW 1/4 SW 1/4 sec.19, T.12 S., R.13 E., Imperial County,
Hydrologic Unit 18100200, on right bank, 3.5 mi upstream from mouth, and 5.2 mi northwest of Westmorland.
PERIOD OF RECORD.-January 1943 to current year. (Monthly discharge only, January 1943 to September 1960
published in WSP 1734; daily discharge available in files of the U.S. Geological Survey.)
GAGE.-Water-stage recorder. Elevation of gage is 220 ft below sea level, from topographic map.
REMARKS.-Records good. Discharge mainly represents seepage and return flow from irrigated areas. See schematic
diagram of Salton Sea Basin.
EXTREMES FOR PERIOD OF RECORD.-Maximum daily discharge, 3,000 ft3/s, Aug. 17, 18, 1977, estimated by
Imperial Irrigation District; minimum daily, 150 ft3/s, Mar. 7, 1945.
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
1 655 628 509 573 552 738 867 811 658 648 679 562
2 657 632 521 541 570 722 937 800 671 635 636 549
3 638 623 534 562 580 728 895 837 703 628 695 544
4 614 628 522 572 594 766 813 852 704 616 734 555
5 587 622 559 610 632 793 758 891 685 627 721 553
6 601 619 560 648 627 755 799 889 674 654 773 532
7 638 621 561 636 594 738 845 897 697 642 771 544
8 662 617 556 631 540 693 927 873 677 613 749 551
9 669 611 567 623 547 724 942 821 674 663 713 573
10 680 605 579 619 571 723 901 789 698 718 717 586
11 641 618 593 580 578 769 799 793 726 725 665 621
12 623 634 620 573 570 835 722 804 743 647 668 618
13 647 601 597 585 579 852 738 812 737 670 716 613
14 647 616 576 598 590 867 737 830 713 682 709 616
15 654 599 569 611 587 837 782 820 695 738 686 563
16 658 576 603 590 600 803 806 802 688 669 655 573
17 658 578 605 552 658 757 819 757 697 607 650 642
18 656 572 568 551 683 749 777 791 697 590 661 645
19 644 607 569 546 691 796 765 776 696 630 654 618
20 628 610 550 572 689 823 791 779 727 638 671 643
21 630 592 566 572 697 816 811 769 731 635 664 622
22 645 567 601 594 613 838 793 758 707 629 624 610
23 694 547 609 640 621 841 755 756 724 654 577 662
24 742 566 617 636 639 812 784 718 721 654 568 706
25 830 586 537 623 666 883 764 697 744 653 613 711
26 747 561 493 609 646 891 773 698 693 623 658 655
27 644 520 518 607 668 863 773 720 701 647 680 635
28 689 527 553 594 678 856 763 723 675 671 663 633
29 641 521 574 582 --- 802 769 728 665 697 633 606
30 601 507 598 570 --- 804 819 732 666 764 591 627
31 617 --- 599 571 --- 821 --- 689 --- 760 553 ---
TOTAL 20337 17711 17583 18371 17260 24695 24224 24412 20987 20427 20747 18168
MEAN 656 590 567 593 616 797 807 787 700 659 669 606
MAX 830 634 620 648 697 891 942 897 744 764 773 711
MIN 587 507 493 541 540 693 722 689 658 590 553 532
AC-FT 40340 35130 34880 36440 34240 48980 48050 48420 41630 40520 41150 36040
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1943 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 641 563 547 563 598 680 728 663 592 596 614 619
MAX 837 760 707 795 789 829 953 853 763 808 913 807
(WY) 1953 1954 1963 1944 1944 1998 1993 1953 1953 1979 1977 1963
MIN 471 408 386 387 458 516 541 485 436 442 460 486
(WY) 1978 1965 1968 1978 1965 1965 1965 1964 1964 1964 1964 1970
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1943 - 1999
ANNUAL TOTAL 246738 244922
ANNUAL MEAN 676 671 617
HIGHEST ANNUAL MEAN 741 1953
LOWEST ANNUAL MEAN 484 1965
HIGHEST DAILY MEAN 949 Mar 22 942 Apr 9 3000 Aug 17
1977
LOWEST DAILY MEAN 493 Dec 26 493 Dec 26 150 Mar 7
1945
ANNUAL SEVEN-DAY MINIMUM 520 Nov 27 520 Nov 27 284 Mar 4
1945
ANNUAL RUNOFF (AC-FT) 489400 485800 446700
10 PERCENT EXCEEDS 843 811 763
50 PERCENT EXCEEDS 647 654 607
90 PERCENT EXCEEDS 567 563 483
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