Мы проводили натурные наблюдения на Яйвинской ГРЭС и на нескольких водозаборах поменьше. Эта информация представляет коммерческий интерес, она не публикуется. Многое зависит от рыбозащитных сооружений и объёма отбираемых вод. Надо уточнить вопрос или дополнительные сведения указать

В общем интересует конкретно сколько гибнет рыб при прохождении через гидроагрегаты ГЭС. Данные о гибели ВБР от воздействия Нижегородской ГЭС у меня есть. Хотелось бы увидеть какой ущерб наносят другие ГЭС хотя бы ориентировочно в тоннах

Depends evidently on whether a fish stairs has been built as well or not. A nice example can be visited on the Columbia river in Oregon (US), where fish inlcuding five salmon species are counted continuously as well when they make their way up the dam fishstairs.

Obvious solution no? And one gets information on the fish population and evidenlty no dead salmon in dam turbines. The US has a heart for its salmon species. Moreover the stealhead salmon can only be fished by an indian tribe along the river. Hence, the Indian tribe earns a good living fishing and selling the stealhead salmon, whci I can assure you is a delicassy even with wodka.

Great no?

Frank

While the below paper does not directly relate to large rivers and hydroelectric dams, it is worth considering impacts on larval stages. E.g. this paper found that based on flow, between 42 and 100% of drifting larval shrimp (which do exactly the same thing as larval fish) were entrained into a water abstraction structure associated with a low-head dam. Modelling the impact over 30 years, the structure was thought to be responsible for the deaths of between 27-76% of all larvae every day. I imagine the exact same thing is happening at other water abstraction structures such as irrigation withdrawals and larger dams.

Benstead et al. 1999. Effects of a low-head dam and water abstraction on migratory tropical stream biota. Ecological Applications 9: 656-668. 

The loss of fish in hydroelectric projects has been little studied in South America, and even in North America where it is considered a priority, the reports are scarce and controversial (Agostinho et al. 2007). Additionally, information on these events

is treated in a "stealthy", which hampers open discussion to understanding and

mitigate the problem. 

In the link below you can find some experiments with Mekong fish.

http://wle-mekong.cgiar.org/portfolio-item/mk15-optimising-fish-friendly-criteria-for-incorporation-into-the-design-of-mini-hydro-schemes-in-the-lower-mekong-basin/

Огромное спасибо коллеги за обстоятельные ответы

A shitload... 

Water powerplant is basically a huge fish grinder...