Seasonal Effects of Hydropeaking on Growth,Energetics and Movement of Juvenile Atlantic Salmon (Salmo Salar)

The performance and movements of juvenile Atlantic salmon Salmo salar exposed to variable water discharge (simulating hydropeaking) but with a stable water‐covered area were studied in six experimental stream channels, both during the winter and summer. Thirty fish were stocked into each channel, and the growth, body fat and movements of the fish were followed for about 2.5 months in each season. During the winter, no effect of hydropeaking was documented on performance or movement. In the summer, fish experiencing hydropeaking had lower body mass, lower body fat, and higher movement rates than the control fish. In general, effect sizes were small, and the rapid and frequent changes in water discharge and water level in the present study had small effects on the performance of juvenile Atlantic salmon. The cumulative long‐term effect at the population level is unknown, but a reduced growth rate of 10% and a reduction in body fat of 16% in the hydropeaking experiments in the summer might to some extent translate into increased smolt age and lower overwintering survival. Copyright © 2014 John Wiley & Sons, Ltd.     

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山美水电站3号机组上导轴承旋转油槽盖板磨损毁坏原因分析及处理措施

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向家坝水电站二次设备安装质量控制

水电站二次设备安装工程在机电安装工程中占有重要地位,本文结合向家坝机电安装工程管理实践,介绍了质量管理组织体系建设、图纸审查、设备检验、安装调试、专业间技术协调、推行尾工项目列清单和抓好工程质量验收与评定等质量控制的经验做法。     

水轮发电机组的状态监测和故障诊断

水轮发电机组是水电厂的核心设备之一,其运行状态的稳定性与安全性直接关系到水电厂的安全。本文在分析水轮发电组振动机理、监测内容及典型故障的基础上,对水轮发电组的状态监测和故障诊断系统进行了阐述。     

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