Mountain Jungle Intakes?Design and Model Study

by Jaro J. Vocadlo, Shawinigan Lavalin Inc, Montreal, Que, Can,
F. E. Parkinson, Shawinigan Lavalin Inc, Montreal, Que, Can,
Y. Y. Kwan, Shawinigan Lavalin Inc, Montreal, Que, Can,

Document Type: Proceeding Paper

Part of: Water Power '87


Nine intakes of various sizes and designs supply water to the two high head power plants in the Sungai Piah Hydroelectric Development in Malaysia. The intakes are located on steep mountain streams in tropical jungle, and must operate with infrequent maintenance. Acceptable performance requires that they exclude floating debris, bedload and suspended sediment larger than 0. 25 mm. Entrained air bubbles would be eliminated downstream in the drop shafts. Two layouts representative of the key design concepts were selected for hydraulic model testing. Diversion capacity is 3. 3 m**3/s in the intermediate sized structures. The side stream intake includes a skimmer wall, a scour channel with sluice outlet, and excluder wall, a catch basin, and a V-shaped settling basin leading to an outlet box and the drop shaft. Flood flows are released over a concrete weir and a sediment removal sluice. The paper describes the design concepts of the two selected layouts and the model testing procedures which provided improved hydraulic efficiency and generated performance data.

Subject Headings: Water intakes | Hydraulic models | Hydraulic design | Hydro power | Power plants | Hydraulic structures | Mountains | Malaysia | Asia

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