bÀi tẬp lỚn mÔn thỦy vĂn cÔng trÌn12
TRANSCRIPT
BI TP LN MN THY VN CNG TRNH
BI TP LN MN THY VN CNG TRNH BI S 1:DNG CHY NM1 Chun dng chy nm bnh qun nhiu nm Qn c tnh theo trnh t sau y : A/ Lu lng nc bnh qun nhiu nm Qn ( m/s) l lng nc tnh bng m , chy qua mt ct ca ra ca lu vc trong mt n v thi gian (mt ngy ), ly trung bnh trong nhiu nm. Cn phn bit gia lu lng nc trung bnh trong mt khong thi gian (v d mt ngy m, mt thng, mt nm ) tnh bng tng lng nc chy qua mt ct chia u cho khong thi gian ly trung bnh. Chui quan trc dng tnh chun dng chy phi gm nhm cc nm nhiu nc, t nc v trung bnh iu kin ny nhiu khi b vi phm do s nm quan trc c ti v tr cng trnh khng di, do chc chn nh hng ti chnh xc ca kt qu tnh chun dng chy. Trong bi tp ny chng ta tnh lu lng nc bnh qun nhiu nm Qn theo cng thc : Qn= (1) Qn : lu lng nc bnh qun tng nm n : s nm quan trc
Trong :
NGUYN QUC KHNH_LP:50TH1_MSSV:3795.50
1
BI TP LN MN THY VN CNG TRNH
Trm :Sn tyTT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Nm 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 I 906 919 940 916 1260 1210 1890 853 770 1320 1500 1420 1550 1240 1020 1250 1260 1630 1450 1360 1160 1290 1390 1290 1060 1150 II 741 721 1090 777 1130 1160 1250 769 730 1010 1140 1140 1300 922 921 1130 987 1400 1180 942 1330 1110 973 1220 1020 977
Sng:III 607 744 709 1120 887 1190 921 774 629 874 790 870 1210 747 643 875 785 1670 903 756 873 915 893 915 728 908
HngIV 749 1190 622 1280 661 1440 1010 682 575 1310 892 988 1680 784 856 1070 974 1520 1000 1340 1080 1180 837 920 734 1570 V 2910 1140 843 2520 970 1370 1640 816 593 1470 1100 1480 2260 1400 2590 2180 1840 3010 1690 2550 2870 1520 3110 1560 1370 3580 VI 6420 6130 3420 5510 3490 5210 5930 2160 795 5590 6710 2930 4690 3190 4490 5910 3700 6040 4560 7090 4420 2020 6780 4500 2010 5830
F(km2)136000VII 7280 9860 7990 6600 7500 4840 8030 6390 3760 7360 12200 5110 10200 6190 12100 10900 7320 9360 7300 6240 5820 9030 7320 5980 7570 7930 VIII 11200 5830 9980 9410 9350 11000 7720 7700 4860 5950 9160 8690 10500 14800 9370 18800 784 10500 7100 5430 9510 8160 8170 8650 8430 9800 IX 5950 4000 6390 6070 6620 6560 4460 4430 2920 3670 8530 5450 8080 5220 6780 9360 6720 9840 7630 6070 5420 3940 8380 9670 6740 6920 X 2910 3460 3210 3820 3550 5290 3250 7320 2680 4310 5090 3880 5170 2550 3420 4440 5000 4410 4670 3520 3260 3520 5130 3310 3120 4640 XI 1710 1620 1700 2190 2090 3520 1800 4870 2520 4480 2990 2660 3680 2250 2020 2730 3400 3150 2340 2500 3180 2260 2310 1810 1710 3980 XII 1110 1100 1090 1350 1790 2170 1200 2010 1470 1090 1810 1960 1800 1160 2600 1580 2990 1940 1480 1520 1610 1400 1470 1220 1230 2040 Qi(m3/s) 3541.0833 3059.5 3165.3333 3463.5833 3274.8333 3746.6667 3258.4167 3231.1667 1858.5 3202.8333 4326 3048.1667 4343.3333 3371.0833 3900.8333 5018.75 2980 4539.1667 3441.9167 3276.5 3377.75 3028.75 3896.9167 3420.4167 2976.8333 4110.4167 90858.75
NGUYN QUC KHNH_LP:50TH1_MSSV:3795.50
2
BI TP LN MN THY VN CNG TRNH
Ta c:Qn = = 3494,57 m /s Sai s ly mu tng i c tnh theo cng thc : = x 100% Tnh ton C theo bng sau ( Bng 2) :TT 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Nm 2 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 Qi(m3/s) 3 3541.083 3059.5 3165.333 3463.583 3274.833 3746.667 3258.417 3231.167 1858.5 3202.833 4326 3048.167 4343.333 3371.083 3900.833 5018.75 2980 4539.167 3441.917 3276.5 3377.75 3028.75 3896.917Ki=Qi/Qn 4 Ki-1 5 (Ki - 1)2 6
(2)
1.01331 0.875501 0.905786 0.991133 0.937121 1.07214 0.932423 0.924625 0.531825 0.916517 1.237921 0.872258 1.242881 0.964663 1.116256 1.436157 0.852752 1.29892 0.984933 0.937597 0.966571 0.866702 1.115135
0.01331 -0.1245 -0.09421 -0.00887 -0.06288 0.07214 -0.06758 -0.07538 -0.46817 -0.08348 0.237921 -0.12774 0.242881 -0.03534 0.116256 0.436157 -0.14725 0.29892 -0.01507 -0.0624 -0.03343 -0.1333 0.115135
0.000177 0.0155 0.008876 7.87E-05 0.003954 0.005204 0.004567 0.005682 0.219183 0.006969 0.056606 0.016318 0.058991 0.001249 0.013515 0.190233 0.021683 0.089353 0.000227 0.003894 0.001118 0.017769 0.013256
NGUYN QUC KHNH_LP:50TH1_MSSV:3795.50
3
BI TP LN MN THY VN CNG TRNH
24 25 26
1979 1980 1981
3420.417 2976.833 4110.417 90858.75
0.97878 0.851845 1.17623
-0.02122 -0.14815 0.17623
0.00045 0.021948 0.031057 0.807858
C =
= 0,179 ( v n = 26