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Stabilirea nivelului maxim de exploatare

Stabilirea nivelului maxim de exploatare



STABILIREA NIVELULUI MAXIM DE EXPLOATARE

Un lac de acumulare artificial, creat prin constructia unui baraj, influenteaza prin posibilitatile sale de inmagazinare si prin capacitatea de evacuare a descarcatorilor sai, regimul de curgere al viiturilor. Unele lacuri sunt astfel dimensionate incat debitul maxim cu o asigurare data, care intra in lac, este redus intr-o masura impusa. Acest efect de atenuare a apelor mari fereste de inundatii regiunile situate in aval si deci inlatura pericolul provocarii de pagube, a caror valoare reprezinta uneori mai mult decat costul barajului in sine. Desi, in general nivelul apei in lac se gaseste sub nivelul deversorilor de suprafata si deci o parte din volumul de apa al viiturii se poate inmagazina in lac, este recomandabil a nu se conta pe acest aport. Calculul atenuarii se face deci considerand ca la inceputul viiturii nivelul apei din lac se gaseste la cota crestei deversorilor si ca urmare numai volumul situat deasupra acestei cote contribuie la reducerea debitelor defluente din lac. Pentru siguranta deplina, se considera de asemenea ca descarcatori de adancime.



Diferenta dintre NME si NNR este corespunzatoare unui volum de protectie necesar pentru atenuarea viiturilor. Pentru a studia atenuarea viiturii, adica pentru a putea calcula diferenta de nivel intre NME si NNR, trebuie cunoscuta suprafata oglinzii de apa la nivelul corespunzator volumului de protectie, precum si capacitatea de evacuare a descarcatorilor, dimensiunile adoptate pentru acestea.

NME-NNR=2m 

102m-100m=2m

SUPRAFATA OGLINZII DE APA

Suprafata oglinzii de apa se stabileste prin masuratori planimetrice si se considera:

S = 8.700.000m2   = 870 ha =8.7 km2

CALCULUL DE ATENUARE A UNDEI DE VIITURA

hidrograful viiturii de calcul are urmatoarele valori T de termeni hidrograf afluent

Q [mc/s]

NR. Cr.

Timp [ore]

Debitele undei de viitura

20 50 90 140 200 250 310 370 450

510 500 470 420 390 350 310 270 240 220

200 170 150 130 110 90 80 70 60 40

30 20 15 0

Volumul undei afluiente W = 2.421E+07

Sarcina si hidrograful atenuat

H( 1 )= 0.00 Qatn= 0.00

H( 2 )= 0.00 Qatn= 0.00

H( 3 )= 0.00 Qatn= 0.01

H( 4 )= 0.02 Qatn= 0.07

H( 5 )= 0.04 Qatn= 0.28

H( 6 )= 0.09 Qatn= 0.79

H( 7 )= 0.15 Qatn= 1.82

H( 8 )= 0.24 Qatn= 3.54

H( 9 )= 0.34 Qatn= 6.15

H( 10 )= 0.47 Qatn= 9.88

H( 11 )= 0.62 Qatn= 15.06

H( 12 )= 0.79 Qatn= 21.94

H( 13 )= 0.98 Qatn= 29.93

H( 14 )= 1.15 Qatn= 38.19

H( 15 )= 1.30 Qatn= 46.12



H( 16 )= 1.44 Qatn= 53.52

H( 17 )= 1.56 Qatn= 60.34

H( 18 )= 1.66 Qatn= 66.36

H( 19 )= 1.75 Qatn= 71.50

H( 20 )= 1.82 Qatn= 75.81

H( 21 )= 1.88 Qatn= 79.50

H( 22 )= 1.92 Qatn= 82.66

H( 23 )= 1.96 Qatn= 85.17

H( 24 )= 1.99 Qatn= 87.03

H( 25 )= 2.01 Qatn= 88.34

H( 26 )= 2.02 Qatn= 89.14

H( 27 )= 2.03 Qatn= 89.41

H( 28 )= 2.03 Qatn= 89.30

H( 29 )= 2.02 Qatn= 88.94

H( 30 )= 2.01 Qatn= 88.34

H( 31 )= 2.00 Qatn= 87.39

H( 32 )= 1.98 Qatn= 86.09

H( 33 )= 1.95 Qatn= 84.58

H( 34 )= 1.93 Qatn= 82.93

H( 35 )= 1.90 Qatn= 80.92

H( 36 )= 1.87 Qatn= 78.96

H( 37 )= 1.84 Qatn= 77.07

H( 38 )= 1.81 Qatn= 75.24

H( 39 )= 1.78 Qatn= 73.47

H( 40 )= 1.75 Qatn= 71.75

H( 41 )= 1.72 Qatn= 70.09

H( 42 )= 1.70 Qatn= 68.47

H( 43 )= 1.67 Qatn= 66.91

H( 44 )= 1.65 Qatn= 65.39

H( 45 )= 1.62 Qatn= 63.92

H( 46 )= 1.60 Qatn= 62.49

H( 47 )= 1.57 Qatn= 61.11

H( 48 )= 1.55 Qatn= 59.77

H( 49 )= 1.53 Qatn= 58.46

H( 50 )= 1.51 Qatn= 57.19

H( 51 )= 1.48 Qatn= 55.96

H( 52 )= 1.46 Qatn= 54.77

H( 53 )= 1.44 Qatn= 53.61

H( 54 )= 1.42 Qatn= 52.48

H( 55 )= 1.40 Qatn= 51.38

H( 56 )= 1.38 Qatn= 50.31

H( 57 )= 1.36 Qatn= 49.28

H( 58 )= 1.34 Qatn= 48.27

H( 59 )= 1.33 Qatn= 47.29

H( 60 )= 1.31 Qatn= 46.33

H( 61 )= 1.29 Qatn= 45.40

H( 62 )= 1.27 Qatn= 44.50

H( 63 )= 1.26 Qatn= 43.62

H( 64 )= 1.24 Qatn= 42.76

H( 65 )= 1.22 Qatn= 41.92

H( 66 )= 1.21 Qatn= 41.11

H( 67 )= 1.19 Qatn= 40.32

H( 68 )= 1.18 Qatn= 39.55

H( 69 )= 1.16 Qatn= 38.79

H( 70 )= 1.15 Qatn= 38.06

H( 71 )= 1.13 Qatn= 37.34

H( 72 )= 1.12 Qatn= 36.65

H( 73 )= 1.11 Qatn= 35.97

H( 74 )= 1.09 Qatn= 35.30

H( 75 )= 1.08 Qatn= 34.66

H( 76 )= 1.07 Qatn= 34.03

H( 77 )= 1.05 Qatn= 33.41

H( 78 )= 1.04 Qatn= 32.81

H( 79 )= 1.03 Qatn= 32.22

H( 80 )= 1.01 Qatn= 31.65

H( 81 )= 1.00 Qatn= 31.09

H( 82 )= 0.99 Qatn= 30.54

H( 83 )= 0.98 Qatn= 30.01

H( 84 )= 0.97 Qatn= 29.49

H( 85 )= 0.96 Qatn= 28.98

H( 86 )= 0.95 Qatn= 28.48

H( 87 )= 0.94 Qatn= 28.00

H( 88 )= 0.92 Qatn= 27.52

H( 89 )= 0.91 Qatn= 27.06

H( 90 )= 0.90 Qatn= 26.60

H( 91 )= 0.89 Qatn= 26.16

H( 92 )= 0.88 Qatn= 25.72

H( 93 )= 0.87 Qatn= 25.30

H( 94 )= 0.86 Qatn= 24.89

H( 95 )= 0.86 Qatn= 24.48

H( 96 )= 0.85 Qatn= 24.08

H( 97 )= 0.84 Qatn= 23.69

H( 98 )= 0.83 Qatn= 23.31

H( 99 )= 0.82 Qatn= 22.94

H( 100 )= 0.81 Qatn= 22.58

H( 101 )= 0.80 Qatn= 22.22

H( 102 )= 0.79 Qatn= 21.87

H( 103 )= 0.78 Qatn= 21.53

H( 104 )= 0.78 Qatn= 21.19

H( 105 )= 0.77 Qatn= 20.87

H( 106 )= 0.76 Qatn= 20.54

H( 107 )= 0.75 Qatn= 20.23

H( 108 )= 0.75 Qatn= 19.92

H( 109 )= 0.74 Qatn= 19.62

H( 110 )= 0.73 Qatn= 19.32

H( 111 )= 0.72 Qatn= 19.03

H( 112 )= 0.72 Qatn= 18.75

H( 113 )= 0.71 Qatn= 18.47

H( 114 )= 0.70 Qatn= 18.20

H( 115 )= 0.69 Qatn= 17.93

H( 116 )= 0.69 Qatn= 17.67

H( 117 )= 0.68 Qatn= 17.41

H( 118 )= 0.67 Qatn= 17.16

H( 119 )= 0.67 Qatn= 16.91

H( 120 )= 0.66 Qatn= 16.67

H( 121 )= 0.66 Qatn= 16.43

H( 122 )= 0.65 Qatn= 16.20

H( 123 )= 0.64 Qatn= 15.97

H( 124 )= 0.64 Qatn= 15.74

H( 125 )= 0.63 Qatn= 15.52

H( 126 )= 0.63 Qatn= 15.31

H( 127 )= 0.62 Qatn= 15.09

H( 128 )= 0.61 Qatn= 14.89

H( 129 )= 0.61 Qatn= 14.68

H( 130 )= 0.60 Qatn= 14.48

H( 131 )= 0.60 Qatn= 14.28

H( 132 )= 0.59 Qatn= 14.09

H( 133 )= 0.59 Qatn= 13.90

H( 134 )= 0.58 Qatn= 13.71

H( 135 )= 0.58 Qatn= 13.53

H( 136 )= 0.57 Qatn= 13.35

H( 137 )= 0.57 Qatn= 13.17

H( 138 )= 0.56 Qatn= 13.00

H( 139 )= 0.56 Qatn= 12.83

H( 140 )= 0.55 Qatn= 12.66

H( 141 )= 0.55 Qatn= 12.49

H( 142 )= 0.54 Qatn= 12.33

H( 143 )= 0.54 Qatn= 12.17

H( 144 )= 0.53 Qatn= 12.02

H( 145 )= 0.53 Qatn= 11.86

H( 146 )= 0.52 Qatn= 11.71

H( 147 )= 0.52 Qatn= 11.56

H( 148 )= 0.51 Qatn= 11.42

H( 149 )= 0.51 Qatn= 11.27

H( 150 )= 0.51 Qatn= 11.13

H( 151 )= 0.50 Qatn= 10.99

H( 152 )= 0.50 Qatn= 10.85

H( 153 )= 0.49 Qatn= 10.72

H( 154 )= 0.49 Qatn= 10.59

H( 155 )= 0.49 Qatn= 10.46

H( 156 )= 0.48 Qatn= 10.33

H( 157 )= 0.48 Qatn= 10.20

H( 158 )= 0.47 Qatn= 10.08

H( 159 )= 0.47 Qatn= 9.96

H( 160 )= 0.47 Qatn= 9.84

H( 161 )= 0.46 Qatn= 9.72

H( 162 )= 0.46 Qatn= 9.60

H( 163 )= 0.45 Qatn= 9.49


H( 164 )= 0.45 Qatn= 9.38

H( 165 )= 0.45 Qatn= 9.27

H( 166 )= 0.44 Qatn= 9.16

H( 167 )= 0.44 Qatn= 9.05

H( 168 )= 0.44 Qatn= 8.95

H( 169 )= 0.43 Qatn= 8.84

H( 170 )= 0.43 Qatn= 8.74

H( 171 )= 0.43 Qatn= 8.64

H( 172 )= 0.42 Qatn= 8.54

H( 173 )= 0.42 Qatn= 8.44

H( 174 )= 0.42 Qatn= 8.35

H( 175 )= 0.41 Qatn= 8.25

H( 176 )= 0.41 Qatn= 8.16

H( 177 )= 0.41 Qatn= 8.07

H( 178 )= 0.40 Qatn= 7.98

H( 179 )= 0.40 Qatn= 7.89

H( 180 )= 0.40 Qatn= 7.80

H( 181 )= 0.40 Qatn= 7.71

H( 182 )= 0.39 Qatn= 7.63

H( 183 )= 0.39 Qatn= 7.54

H( 184 )= 0.39 Qatn= 7.46

H( 185 )= 0.38 Qatn= 7.38

H( 186 )= 0.38 Qatn= 7.30

H( 187 )= 0.38 Qatn= 7.22

H( 188 )= 0.38 Qatn= 7.14

H( 189 )= 0.37 Qatn= 7.06

H( 190 )= 0.37 Qatn= 6.99

H( 191 )= 0.37 Qatn= 6.91

H( 192 )= 0.37 Qatn= 6.84

H( 193 )= 0.36 Qatn= 6.77

H( 194 )= 0.36 Qatn= 6.70

H( 195 )= 0.36 Qatn= 6.63

H( 196 )= 0.36 Qatn= 6.56

H( 197 )= 0.35 Qatn= 6.49

H( 198 )= 0.35 Qatn= 6.42

H( 199 )= 0.35 Qatn= 6.35

H( 200 )= 0.35 Qatn= 6.29

H( 201 )= 0.34 Qatn= 6.22

H( 202 )= 0.34 Qatn= 6.16

H( 203 )= 0.34 Qatn= 6.09

H( 204 )= 0.34 Qatn= 6.03

H( 205 )= 0.33 Qatn= 5.97

H( 206 )= 0.33 Qatn= 5.91

H( 207 )= 0.33 Qatn= 5.85

H( 208 )= 0.33 Qatn= 5.79

H( 209 )= 0.32 Qatn= 5.73

H( 210 )= 0.32 Qatn= 5.68

H( 211 )= 0.32 Qatn= 5.62

H( 212 )= 0.32 Qatn= 5.56

H( 213 )= 0.32 Qatn= 5.51

H( 214 )= 0.31 Qatn= 5.45

H( 215 )= 0.31 Qatn= 5.40

H( 216 )= 0.31 Qatn= 5.35

H( 217 )= 0.31 Qatn= 5.29

H( 218 )= 0.31 Qatn= 5.24

H( 219 )= 0.30 Qatn= 5.19

H( 220 )= 0.30 Qatn= 5.14

H( 221 )= 0.30 Qatn= 5.09

H( 222 )= 0.30 Qatn= 5.04

H( 223 )= 0.30 Qatn= 4.99

H( 224 )= 0.29 Qatn= 4.95

H( 225 )= 0.29 Qatn= 4.90

H( 226 )= 0.29 Qatn= 4.85

H( 227 )= 0.29 Qatn= 4.81

H( 228 )= 0.29 Qatn= 4.76

H( 229 )= 0.29 Qatn= 4.72

H( 230 )= 0.28 Qatn= 4.67

H( 231 )= 0.28 Qatn= 4.63

H( 232 )= 0.28 Qatn= 4.59

H( 233 )= 0.28 Qatn= 4.54

H( 234 )= 0.28 Qatn= 4.50

H( 235 )= 0.27 Qatn= 4.46

H( 236 )= 0.27 Qatn= 4.42

H( 237 )= 0.27 Qatn= 4.38

H( 238 )= 0.27 Qatn= 4.34

H( 239 )= 0.27 Qatn= 4.30

H( 240 )= 0.27 Qatn= 4.26

H( 241 )= 0.26 Qatn= 4.22

H( 242 )= 0.26 Qatn= 4.18

H( 243 )= 0.26 Qatn= 4.14

H( 244 )= 0.26 Qatn= 4.11

H( 245 )= 0.26 Qatn= 4.07

H( 246 )= 0.26 Qatn= 4.03

H( 247 )= 0.26 Qatn= 4.00

H( 248 )= 0.25 Qatn= 3.96

H( 249 )= 0.25 Qatn= 3.93

H( 250 )= 0.25 Qatn= 3.89

H( 251 )= 0.25 Qatn= 3.86

H( 252 )= 0.25 Qatn= 3.83

H( 253 )= 0.25 Qatn= 3.79

H( 254 )= 0.25 Qatn= 3.76

H( 255 )= 0.24 Qatn= 3.73

H( 256 )= 0.24 Qatn= 3.69

H( 257 )= 0.24 Qatn= 3.66

H( 258 )= 0.24 Qatn= 3.63

H( 259 )= 0.24 Qatn= 3.60

H( 260 )= 0.24 Qatn= 3.57

H( 261 )= 0.24 Qatn= 3.54

H( 262 )= 0.23 Qatn= 3.51

H( 263 )= 0.23 Qatn= 3.48

H( 264 )= 0.23 Qatn= 3.45

H( 265 )= 0.23 Qatn= 3.42

H( 266 )= 0.23 Qatn= 3.39

H( 267 )= 0.23 Qatn= 3.36

H( 268 )= 0.23 Qatn= 3.33

H( 269 )= 0.23 Qatn= 3.31

H( 270 )= 0.22 Qatn= 3.28

H( 271 )= 0.22 Qatn= 3.25

H( 272 )= 0.22 Qatn= 3.22

H( 273 )= 0.22 Qatn= 3.20

H( 274 )= 0.22 Qatn= 3.17

H( 275 )= 0.22 Qatn= 3.14

H( 276 )= 0.22 Qatn= 3.12

H( 277 )= 0.22 Qatn= 3.09

H( 278 )= 0.21 Qatn= 3.07

H( 279 )= 0.21 Qatn= 3.04

H( 280 )= 0.21 Qatn= 3.02

H( 281 )= 0.21 Qatn= 2.99

H( 282 )= 0.21 Qatn= 2.97

H( 283 )= 0.21 Qatn= 2.95

H( 284 )= 0.21 Qatn= 2.92

H( 285 )= 0.21 Qatn= 2.90

H( 286 )= 0.21 Qatn= 2.88

H( 287 )= 0.20 Qatn= 2.85

H( 288 )= 0.20 Qatn= 2.83

H( 289 )= 0.20 Qatn= 2.81

H( 290 )= 0.20 Qatn= 2.79

H( 291 )= 0.20 Qatn= 2.76

H( 292 )= 0.20 Qatn= 2.74

H( 293 )= 0.20 Qatn= 2.72

H( 294 )= 0.20 Qatn= 2.70

H( 295 )= 0.20 Qatn= 2.68

H( 296 )= 0.19 Qatn= 2.66

H( 297 )= 0.19 Qatn= 2.64

H( 298 )= 0.19 Qatn= 2.62

H( 299 )= 0.19 Qatn= 2.60

H( 300 )= 0.19 Qatn= 2.58

H( 301 )= 0.19 Qatn= 2.56

H( 302 )= 0.19 Qatn= 2.54

H( 303 )= 0.19 Qatn= 2.52

H( 304 )= 0.19 Qatn= 2.50

H( 305 )= 0.19 Qatn= 2.48

H( 306 )= 0.18 Qatn= 2.46

Volumul undei defluente V = 2.243114E+07 , Rest volum V2= 1778860

- din “ATENLAC” ne-a rezultat un Hmax = 2.03 m, Qatenuat max = 89.41 m3/s





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