MANUAL ON STREAM GAUGING - E-Library - WMO

More documents

Recommendations

Info

II.5-6manual on stream gauging762762761761760RESERVOIR ELEVATION, IN METRES760759758757759758757756.67Gate completely downElevation of high point of gauge, in metres756Free Crest El. 756.67 m7550 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48DISCHARGE, IN THOUSANDS OF CUBIC METRES PER SECONDFigure II.5.9. Rating curves for Black Canyon Dam drum spillway in Idaho, United States(after Bradley, 1953)RESERVOIR ELEVATION, IN METRES762761760759758757Discharge in cubic meters per second for one gate34032030028026024022020012010080604020100180160140Crest El. 756.67 mFree Crest El. 756.67 m756756 757 758 759 760 761 762ELEVATION OF HIGH POINT OF GATE, IN METRESFigure II.5.10. Cross-plotted initial rating curves,Black Canyon Dam, Idaho, United States(after Bradley, 1953)extreme lower curve, which bears plotted pointsshown by X’s, represents the discharge of the freecrest with the gate completely down. The plottedpoints represent values obtained from Table II.5.1.The discharge values shown in Figure II.5.9 are forone gate only. When more than one gate is inoperation the discharges from the separate gatesmay be totaled, providing the gates are each raisedthe same amount. The experimental models used inthis study had from one to eleven gates operating,so that a reasonable allowance for pier effect on thedischarge is already present in the results.The intervals between the eight curves inFigure II.5.9 that are identified by plotted points aretoo great for rating purposes, particularly the gapbetween gate elevations 757.6 and 756.7 m. Thatdeficiency is remedied by cross-plotting the eightcurves for various constant values of discharge, asshown in Figure II.5.10. Fortunately the result is astraight-line variation for any constant value ofdischarge. The lines in Figure II.5.10 are not quiteparallel and there is no assurance that they will bestraight for every drum gate. Nevertheless, thisuncertainty will not detract appreciably from theaccuracy obtained. Interpolated information fromFigure II.5.10 is then utilized to construct theadditional curves in Figure II.5.9. Figure II.5.9 nowshows the rating for the Black Canyon Dam spillwayfor gate intervals of 0.150 m. For intermediatevalues, straight-line interpolation is permissible.
Chapter 5. DISCHARGE RATINGS FOR MISCELLANEOUS HYDRAULIC FACILITIESII.5-7Table II.5.2. Head and discharge computations for drum gates in raised positionsSetReservoirelevation inmetresH in metres a Ratio H-YCoefficient C qH 3/2 in metres Q in m 3 /sec b1 2 3 4 5 6 7gate elevation 760.476; θ = + 34.88°A 761.390 0.305 0.048 2.131 0.168 6.99761.695 0.610 0.095 2.132 0.476 19.79762.000 0.914 0.143 2.130 0.874 36.33gate elevation 760.476; θ = + 23.43°B 760.781 0.305 0.048 2.122 0.168 6.97761.086 0.610 0.095 2.129 0.476 19.76761.390 0.914 0.143 2.127 0.874 36.27761.695 1.219 0.190 2.134 1.346 56.04762.000 1.524 0.238 2.137 1.881 78.44gate elevation 759.866; θ = + 14.22°C 760.171 0.305 0.048 2.036 0.168 6.68760.476 0.610 0.095 2.059 0.476 19.11760.781 0.914 0.143 2.070 0.874 35.31761.390 1.524 0.238 2.098 1.881 76.99762.000 2.134 0.333 2.120 3.117 128.90gate elevation 759.257; θ = + 6.13°D 759.562 0.305 0.048 1.915 0.168 6.29759.866 0.610 0.095 1.937 0.476 17.98760.171 0.914 0.143 1.971 0.874 33.61760.781 1.524 0.235 2.004 1.881 73.54761.390 2.134 0.333 2.043 3.117 124.20762.000 2.743 0.429 2.082 4.543 184.48gate elevation 667.207; θ = – 1.28°E 758.952 0.305 0.048 1.768 0.168 5.80759.257 0.610 0.095 1.812 0.476 16.82759.562 0.914 0.143 1.844 0.874 31.46760.171 1.524 0.228 1.905 1.881 69.91760.781 2.134 0.333 2.957 3.117 118.99761.390 2.743 0.429 2.004 4.543 177.63762.000 3.353 0.524 2.040 6.139 244.29gate elevation 758.0.98; θ = – 8.28°F 758.342 0.244 0.038 1.664 0.120 3.91758.647 0.549 0.086 1.711 0.406 13.56758.952 0.853 0.133 1.749 0.788 26.90759.562 1.463 0.229 1.828 1.770 63.12760.171 2.073 0.324 1.893 2.984 110.21760.781 2.682 0.419 1.937 4.393 166.02761.390 3.292 0.515 1.976 5.973 230.24762.000 3.901 0.610 2.007 7.706 301.66
Page 1:
QualityManagementFrameworkMANUAL ON
Page 4 and 5:
WMO-No. 1044© World Meteorological
Page 6 and 7:
ivmanual on stream gauging1.13.2 Fr
Page 8 and 9:
vimanual on stream gauging6.5.4 Par
Page 11:
PREFACEWith the adoption by the WMO
Page 16 and 17:
xivMANUAL ON STREAM GAUGINGкото
Page 18 and 19:
xviMANUAL ON STREAM GAUGINGse prese
Page 20 and 21:
xviiiMANUAL ON STREAM GAUGINGfreque
Page 23 and 24:
Chapter 1Discharge ratings using si
Page 25 and 26:
Chapter 1. Discharge ratings using
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62: Chapter 1. Discharge ratings using
Page 63: Chapter 1. Discharge ratings using
Page 66 and 67: II.2-2manual on stream gaugingcurre
Page 68 and 69: II.2-4manual on stream gaugingtabul
Page 70 and 71: II.2-6manual on stream gaugingDelta
Page 72 and 73: II.2-8manual on stream gaugingVELOC
Page 74 and 75: II.2-10manual on stream gaugingMEAN
Page 76 and 77: II.2-12manual on stream gaugingMorl
Page 78 and 79: II.3-2manual on stream gaugingafter
Page 80 and 81: II.3-4manual on stream gaugingsteep
Page 82 and 83: II.3-6manual on stream gaugingGAUGE
Page 84 and 85: II.3-8manual on stream gauging1.0DI
Page 86 and 87: II.3-10manual on stream gauging1.00
Page 88 and 89: II.3-12manual on stream gauging(ii)
Page 90 and 91: II.3-14manual on stream gaugingBy c
Page 92 and 93: II.3-16manual on stream gauging1413
Page 94 and 95: II.3-18manual on stream gauging5454
Page 96 and 97: II.3-20manual on stream gauginga se
Page 98 and 99: II.4-2manual on stream gauging4.2 T
Page 100 and 101: II.4-4manual on stream gaugingTable
Page 102 and 103: II.4-6manual on stream gaugingCOLUM
Page 104 and 105: II.4-8manual on stream gaugingDISCH
Page 106 and 107: II.4-10manual on stream gaugingScha
Page 108 and 109: II.5-2manual on stream gauging(iv)
Page 110 and 111: II.5-4manual on stream gaugingCrest
Page 114 and 115: II.5-8manual on stream gauging(cont
Page 116 and 117: II.5-10manual on stream gaugingh 1=
Page 118 and 119: II.5-12manual on stream gaugingdeve
Page 120 and 121: II.5-14manual on stream gaugingupst
Page 122 and 123: II.5-16manual on stream gaugingthat
Page 124 and 125: II.5-18manual on stream gauging(b)
Page 126 and 127: II.5-20manual on stream gaugingComp
Page 128 and 129: II.5-22manual on stream gaugingflow
Page 130 and 131: II.5-24manual on stream gaugingPres
Page 132 and 133: II.5-26manual on stream gaugingin o
Page 134 and 135: II.5-28manual on stream gaugingCond
Page 136 and 137: II.5-30manual on stream gaugingdisc
Page 138 and 139: II.5-32manual on stream gauging(ii)
Page 140 and 141: II.5-34manual on stream gaugingmaxi
Page 143 and 144: Chapter 6Analysis and COMPUTATION O
Page 145 and 146: Chapter 6. Analysis and COMPUTATION
Page 163 and 164:
Chapter 6. Analysis and COMPUTATION
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195:
show all

MANUAL ON STREAM GAUGING - E-Library - WMO

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?