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HW_6 solutions

HW_6 solutions - H W c I t 4 P 7 R 5 S O L U T I O W S 5 1...

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HW. ( cI-t4P7R 5 ) SOLUTIOWS 5-1. (a) Plot double-mass curve for the two stations.from 1937 - 1974 using cumulative peak flow. 3 5foO 1 oooiZc 3 oO Cumulative Flow (cfs) J Cumulative Flow (cfs) Water Year Delhi Hale Eddy J Water Year Delhi Hale Eddy 1937 2180 10100 1956 86350 324310 b*-l?° L938— 11120 35700—i 1957 89330 333540 1939 15640 50000 1958 92160 347640 1940 22070 73400 1959 97660 367740 1941 23850 81610 1960 102560 385940 1942 29940 103510 1961 105690 403240 1943 34810 126810 1962 109180 417440 1944 38260 141010 1963 114020 429740 1945 41500 152010 1964 120350 438740 1946 44220 163010 1965 123190 441440 1947 47620 175810 1966 124850 444410 1948 52300 204710 1967 126600 447860 1949 56550 220710 1968 129470 454470 1950 60980 236210 1969 132150 458370 1951 - 67680 255710 1970 136560 469070 1952 70590 266210 1971 136560 476570 1953 74330 282810 1972 140880 482770 1954 76890 293010 1973 144850 495970 1955 81500 309010 1974 150920 500390’ / ., P1
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‘‘ 600000 U 500000 -e $ 400000 ‘11 c 300000 200000 100000 V. E - -V c.) I I 0 20000 40000 60000 80000 100000 120000 140000 160000 Cumulative flow at Delhi (cfs) From the above figure, we can see the inhomogenety in Hale Eddy record began m 1964 and till 1971. (b) E1jninating the inhomogeneous portion of the Hale Eddy recor 964-1971 that ffrthëièiéi Then prepare the histogram of record at both Delhi (1937 - 1974) and Hale Eddy (1913 - 1963, 1972-1984) station. P2
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(1.) Histogram at Delhi station (1937-1974) 12- / 110.. 4 . S ///,. 6 •‘ _____ Q 4 / / / - // / / 2 __ •• r Peak flow in 1000 cfs (2) Histogram at Hale Eddy (1937-1963, 1972-1974) 2 A .5 2! ‘VI 11 •: Peak flow in l000cfs P3
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(c).tfl 2.’i
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