(i) On the apron of spillway model built to a scale of 1 : 25, a hydraulic jump of 115 mm is formed and time required to open the spillway gate is 90 sec. If the discharge in the prototype spillway is 1200 cumec, then determine height of the jump in prototype, time in the prototype to produce the same surge effects in model and discharge over the model.

(i) On the apron of spillway model built to a scale of 1 : 25, a hydraulic jump of 115 mm is formed and time required to open the spillway gate is 90 sec. If the discharge in the prototype spillway is 1200 cumec, then determine height of the jump in prototype, time in the prototype to produce the same surge effects in model and discharge over the model.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Spillway design

A spillway is the overflow portion of the dam that carries the surplus discharge flow from the reservoir to the downstream, that is, it carries the flood water safely downstream, which is enough to be stored in that reservoir. Therefore, it acts as a safety valve for the dam because many failures of the dam arise due to the incorrect design of the spillway.

Question

(i) On the apron of spillway model built to a scale of 1 : 25, a hydraulic jump of 115 mm
is formed and time required to open the spillway gate is 90 sec. If the discharge in the
prototype spillway is 1200 cumec, then determine height of the jump in prototype,
time in the prototype to produce the same surge effects in model and discharge over
the model.

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