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Accession number;03A0395301
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| Title;A Study on Relation between Performance and Shapes of Labyrinth Weirs with Sharp Crests |
| Author;
TSUNESUMI NAOTO
(National Agricultural Res. Organization (NARO), JPN)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.224;PAGE.275-283(2003)
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| Figure&Table&Reference;FIG.10, TBL.3, REF.10 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;In this study, we proposed discharge coefficient formulas of labyrinth weirs with sharp crests, including them of high density or quasi-rectangular shapes, based on hydraulic experiments. And we examined effects of these labyrinth weirs from discharge coefficient per unit width (Cwr) and unit discharge per volume (q/v) to these of straight weirs. From the results, it became clear that labyrinth weirs with quasi-triangular and high density shape has advantage on the condition of small dam spillways in which longitudinal length of labyrinth weirs are limited. Vertical aspect ratio (W/P) is less than 2 and apex ratio (A/W) is 0.0765 in the labyrinth weirs. Unit discharge of the labyrinth weirs is about 3.9-6.6m3/s/m at the maximum on the condition of small dam spillways in which head (H) is less than 0.8m and head to crest height ratio (H/P) is 0.3-0.5. (author abst.) |
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