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<br />c:c <br />Cl) <br />...., <br />(;',J <br /> <br />c <br /> <br />CON1ENTS <br /> <br />Xl <br /> <br />&ctfflfl <br />58. Determination ofsize of percolation model.................................... <br />'59. Comparison of percolation model and electric analogy results. . . . . . . . . . . . . . . . . . . <br />60. COmputation of pressures from flow net results. . . . . . . . . . . . . . , . . . . . , . . . . . . . . . . . <br />61. Quantitative relations for flow under the dam. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> <br />Po., <br />79 <br />79 <br />80 <br />80 <br /> <br />CHAPTER VI-SEDIMENTATION STUDIES <br /> <br />SEDIMENT PROBLEMS OF THE RESERVOIR AND ALL-AMERICAN <br />CANAL HEADWORKS <br /> <br />61. The Montrose Imperial Dam model. .............. ....... .....,'. .... ........ 87 <br />63. Model rests qualitative only. ..... ............................ ,... '.... ...... 87 <br />64. Sediment deposits in the reservoir. ................. ,-,...................... 90 <br />65. Effect of river approach direction on intake conditions. . . . . . . . . . . . . . . . . . . . . . . . . 94 <br />66. Investigation of trashrad:: and tra.ining dike lay-outs........................... fJ7 <br />67. Groins on upstream spillway apron......................................... . 99 <br /> <br />PROBLEMS OF THE All-AMERICAN CANAL DESILTING WORKS <br /> <br />68. Scope of the investigations. .... ...... ....... ....... .... ..... ................ 102 <br />69. Inlet channel alinement. . . ............................................. 102 <br />70. Bypass and influent gate structures. . . . ........... _........................... 102 <br />71. Sediment removal in sluicingc~a.nael......................................... 103 <br /> <br />SEDIMENT SCRAPER INVESTIGATIONS <br /> <br />72. Purpose oE the investigations. ...............................;............... 105 <br />73. Tests on normal scrapers.................................................... 105 <br />74. Tests on diagonal scrapers................................................... 106 <br /> <br />STUDY OF INFLUENT SLOTS <br /> <br />75, Purpose ofstudy,. . . , ,...."."...,...............".,....,................ 107 <br />76. The model tests............................................................ 109 <br />77. Results oEtests.... ... ... .... ............. ... .... ..... ... ............. ...... 109 <br /> <br />CHAPTER VII-STUDY OF THE GILA CANAL HEADWORKS <br /> <br />78. Problems of the control suuctures. . . . . . <br />79. The ball check valves................. <br /> <br />113 <br />117 <br /> <br />CHAPTER VIII-CANAL STRUctURES <br /> <br />INTRODUCTION <br /> <br />80. Types of canal structures investigated............................... ... ...... 121 <br /> <br />CHUTES, WASTEWAYS, .AND RIVER CROSSINGS <br /> <br />81. Siphon Drop turn-out ani'chute. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 121 <br />82. The Pilot Knob wasteway...,............................................... 123 <br />83. Tests on the control gate structure. of Pilot Knob wasteway. . . . . ... ............ 126 <br />84. Tests on chute aod stilling pool of Pilot Knob wasteway. . . . . . . . . . . . . . . . . . . . . . . 129 <br />8S. Forruna wasteway.......................................................... 132 <br />86. The New River crossing. ....... ........ .... ........... .... ..... ............ 134 <br />87. The Alamo River crossing................................................... 138 <br />