Bai Tap Thuy Van

tÝnh to¸n hå chøa ®iÒu tiÕt n¨m §Ò bµi : - Hä tªn : TrÇn TuÊn Anh ; Líp : 46C2 - §Ò sè :04 - Quan hÖ ®Æc trng ®Þa h×nh lßng hå : Z(m) 490 492 494 496 498 500 502 504 506 508 510 512

F(km²) 0.195 0.378 0.57 0.718 0.86 1.108 1.335 1.658 1.945 2.208 2.493 2.85

W(106 m3 ) 0.279 0.849 1.795 3.081 4.658 6.625 9.066 12.06 15.66 19.81 24.51 30.25

Mùc níc chÕt : Hc = 494 m - Líp bèc h¬i phô thªm : -

Th¸ng VI VII VIII IX X XI XII I II III IV V

ΔZ (mm) 41 36 31 27 27 27 30 42 53 74 70 57 515

- HÖ sè thÊm : K=1%

- Qu¸ tr×nh lîng níc ®Õn vµ qu¸ tr×nh lîng níc dïng øng víi tÇn suÊt thiÕt kÕ: Th¸ng VI VII VIII IX X XI XII I II III IV V

Q q (m3/s ) (m3/s ) 1.65 0.88 1.91 0.67 1.88 0.2 3.68 0.02 3.21 0.04 2.26 1.77 1.46 1.77 1.3 2.63 0.83 2.61 0.59 2.21 0.43 0.56 0.46 0.72

- TÝnh to¸n ®iÒu tiÕt bá qua tæn thÊt : Th¸ng 1 VI VII VIII IX X XI XII I II III IV V

Q(m3/s ) 2 1.65 1.91 1.88 3.68 3.21 2.26 1.46 1.3 0.83 0.59 0.43 0.46

WQ(106m q(m3/s Wq(106 3 ) ) m3 ) 3 4 5 4.277 0.88 2.281 5.116 0.67 1.795 5.035 0.2 0.536 9.539 0.02 0.052 8.598 0.04 0.107 5.858 1.77 4.588 3.910 1.77 4.741 3.482 2.63 7.044 2.008 2.61 6.314 1.580 2.21 5.919 1.115 0.56 1.452 1.232 0.72 1.928

WQ-Wq + 6 1.996 3.321 4.500 9.487 8.491 1.270

V1 -

WQ = Q*86400*n*10-6 (106m3). Wq = q*86400*n*10-6 (106m3) , (n: Sè ngµy trong th¸ng). Vi: Qu¸ tr×nh tÝch níc vµo hå.

7

0.830 3.562 4.306 4.339 0.337 0.696 14.07

Vi(106m Si(106m 3 3 ) ) 8 9 1.996 5.317 9.817 14.071 5.232 14.071 8.491 14.071 1.270 13.241 9.679 5.372 1.033 0.696 0.000

-

Si: lîng x¶ thõa. TÝnh tæn thÊt: Tõ mùc níc chÕt: Hc =494 m , nªn thÓ tÝch chÕt lµ Vc = 1.975 (106 m3). BiÓu ®å quan hÖ ®Æc trng ®Þa h×nh lßng hå:

Z~F

512 510 508 506 504 502 500 498 496 494 492 490

Z~V

16.046 1.971

Th¸ng 1 VI VII VIII IX X XI XII I

VK(106m 3 ) 2 1.975

Vtbk(106 m3 ) 3

3.971

2.973

7.292

5.631

11.792

9.542

16.046 16.046 16.046

13.919 16.046 16.046

15.216 11.654

15.631 13.435

ΔZ(m m) 4 41 36 31 27 27 27 30 42

Z(m) 5 495.8 5 499.0 5 502.3 5 505.0 7 506.2 506.2 505.9 9 504.7

F(km2 ) 5'

Wbh(106 m3) 6

Wth(106 m3) 7

Wtt(106 m3) 8

0.708

0.029

0.030

0.059

0.981

0.035

0.056

0.092

1.382

0.043

0.095

0.138

1.819 1.971 1.971

0.049 0.053 0.053

0.139 0.160 0.160

0.188 0.214 0.214

1.943 1.781

0.058 0.075

0.156 0.134

0.215 0.209

II III IV V

7.347

9.500

3.008

5.178

2.671

2.840

1.975

2.323

53 74 70 57

5 502.3 2 498.5 7 495.6 6 494.8 8

1.378

0.073

0.095

0.168

0.912

0.067

0.052

0.119

0.695

0.049

0.028

0.077

0.64

0.036

0.023

0.060

VK = Vi + Vc (106m3) -3 6 3 - Wbh = F * ΔZ * 10 (10 m ) 6 3 - Wth = k * Vtbk (10 m ) 6 3 - Wtt = Wbh + Wth (10 m ) - TÝnh ®iÒu tiÕt cã kÓ ®Õn tæn thÊt : -

Th¸ng 1 VI VII VIII IX X XI XII I II III IV V

Q(m3/s ) 2 1.65 1.91 1.88 3.68 3.21 2.26 1.46 1.3 0.83 0.59 0.43 0.46

WQ(106m q(m3/s ) 3 ) 3 4 4.277 0.88 5.116 0.67 5.035 0.2 9.539 0.02 8.598 0.04 5.858 1.77 3.910 1.77 3.482 2.63 2.008 2.61 1.580 2.21 1.115 0.56 1.232 0.72

Wq(106 m3 ) 5 2.340 1.886 0.674 0.240 0.321 4.802 4.955 7.253 6.482 6.039 1.529 1.988

WQ-Wq + 6 1.937 3.230 4.361 9.298 8.277 1.056

V3

7

1.045 3.771 4.474 4.458 0.414 0.756 14.918

- Wq = Wq(1) + Wtt - KiÓm tra: V3 − V1 V3

=

14.918 − 14.07 14.918 =

0.0568 > 5%

Vi(106m Si(106m 3 3 ) ) 8 9 1.937 5.167 9.528 14.919 3.908 14.919 8.277 14.919 1.056 13.874 10.103 5.628 1.170 0.756 0.000

KÕt luËn: do kiÓm tra kh«ng tháa m·n nªn ta cÇn ph¶i lËp tiÕp c¸c b¶ng tiÕp theo ®Ó t×m ®îc Vh, B.