THE EFFECTS OF SPAWNING FREQUENCY AND DENSITY OF INCUBATING EGGS ON EGG SURVIVAL RATES EGG IN RAINBOW

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MAHBOUBI SOUFIANI N.A.; FARHADIAN O.

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Journal: Journal of Water and Soil Science Year:2002 | Volume:6 | Issue:3 Page(s): 0-0

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Title

THE EFFECTS OF SPAWNING FREQUENCY AND DENSITY OF INCUBATING EGGS ON EGG SURVIVAL RATES EGG IN RAINBOW

Author(s)

MAHBOUBI SOUFIANI N.A. | FARHADIAN O. | Issue Writer Certificate

Keywords

STREAM FLOWQ3

Abstract

Of the many hydraulic structures developed by man, the weir is perhaps the olsest. Weirs are used for the measuremsnt of discharge and regulation of water flow. The most common types of weirs are broad- crested, sharp- crested, circular crested and cylindrical and ogee crest weirs. Advantage of the circular- crested and cylindrical weir compared to the other weirs include simplicity of design, stable overflow pattern, larger coefficient of discharge and the associated lower costs. In the present study, potential flow around a circular cylinder are adapted to determine the velocity distribution at the crest section and to develop a model for coefficient of discharge Cd for circular- crested weirs. These results were evaluated using present test data for three types of weir models, namely, cylindrical, semicylindrical and semicylindrical with different heights and also Dressier theory. The results of the study showed that the experimental velocity profile agree very well with the theoretical profiles for the range of the study. Also, the prediction of the velocity distribution over the weir crest crest using Dressier theory is alays less than the proposed model and measured data. The predicted values of coefficient of discharge Cd based on the proposed model agree well with Cd determined from discharge measurements. For the cylindrical model, the coefficient of discharge can be predicted from 7% and for the semicylidrical with different heights within ± 5%.

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APA: Copy

MAHBOUBI SOUFIANI, N.A., & FARHADIAN, O.. (2002). THE EFFECTS OF SPAWNING FREQUENCY AND DENSITY OF INCUBATING EGGS ON EGG SURVIVAL RATES EGG IN RAINBOW. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 6(3), 0-0. SID. https://sid.ir/paper/371639/en

Vancouver: Copy

MAHBOUBI SOUFIANI N.A., FARHADIAN O.. THE EFFECTS OF SPAWNING FREQUENCY AND DENSITY OF INCUBATING EGGS ON EGG SURVIVAL RATES EGG IN RAINBOW. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2002;6(3):0-0. Available from: https://sid.ir/paper/371639/en

IEEE: Copy

N.A. MAHBOUBI SOUFIANI, and O. FARHADIAN, “THE EFFECTS OF SPAWNING FREQUENCY AND DENSITY OF INCUBATING EGGS ON EGG SURVIVAL RATES EGG IN RAINBOW,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 6, no. 3, pp. 0–0, 2002, [Online]. Available: https://sid.ir/paper/371639/en

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