TITLE:
Simultaneous Effect of Convergence and Reducing Slope of Chute Construction on the Economic of the Plan and Cavitation Index (Case Study: Daharan Dam)
AUTHORS:
Hesam Ghodousi, Amir Mahdi Abedini
KEYWORDS:
Cavitation, Chute Structure, WS77 Model, Latitudinal Convergence of Chute
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.7,
July
28,
2016
ABSTRACT: The Daharan Dam, like other dams, is subject to concrete surface wear or
cavitation in the chute structure. This article looks into the concurrent
effects of decreasing the chute angle and slope profile changes from a single
slope to a double slope and the simultaneous latitudinal convergence of the
chute structure on the cavitation index and the economy of project. In order to
perform this research, the geometric specifications were collected of the dam,
and the chute structure as well as those of a flood with a return period of
1000 years, which make up the basis of the spillway design. Taking advantage of
the numerical WS77 model, different modes were simulated with a single slope,
double slope with fixed latitude, double slope with latitudinal convergence,
and the cavitation index and the excavation volumes for each option were calculated.
The results indicated that a decrease in slope led to a rise in the cavitation
index to over 1.2 and that the convergence of the chute structure positively
affected the increase in the cavitation index.