Atlantic salmon is one of the most widely known migratory fish species whose populations have declined because of hydropower installations. Attempts have been made to preserve salmon stocks in regulated rivers by building fishways for adult fish migrating upstream, but downstream migration of salmon smolts has been almost totally ignored. Instead, captive breeding programmes and extensive stock...

1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing Jinagsu 210098, China 2 UNESCO Division of Water Sciences, 1 Rue Miollis, 75732 Paris Cedex 15, France State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan Hubei 430072, China 4 Huibei Irrigation Experiment Station, Kaifeng Henan 475100, China E...

Penstock, a closed conduit, is an important component of hydropower projects. Various optimum design of penstock. These methods are either based on friction loss in the penstock. These formulae formulae available for penstock design have been compared the optimum design of penstock based on minimizing developed method, diameter and annual cost of penstocks out and reduction in annual cost of pe...

Dams provide water supply, flood protection, and hydropower generation benefits, but also harm native species by altering the natural flow regime and degrading aquatic and riparian habitat. Restoring some rivers reaches to free-flowing conditions may restore substantial environmental benefits, but at some economic cost. This study uses a systems analysis approach to preliminarily evaluate remov...

BACKGROUND Reservoirs created by damming rivers are often believed to increase malaria incidence risk and/or stretch the period of malaria transmission. In this paper, we report the effects of a mega hydropower dam on P. falciparum malaria incidence in Ethiopia. METHODS A longitudinal cohort study was conducted over a period of 2 years to determine Plasmodium falciparum malaria incidence amon...

The sediment flux through Himalayan rivers directly impacts water quality and is important for sustaining agriculture as well as maintaining drinking-water and hydropower generation. Despite the recent increase in demand for these resources, little is known about the triggers and sources of extreme sediment flux events, which lower water quality and account for extensive hydropower reservoir fi...

The investment in small hydropower plants requires the analysis of hydrological, technical, operational, budgetary, economical and financial aspects. The analysis of each possible configuration demands the joint action of several technicians, consuming substantial time and money. During initial design of the project, simplified procedures are usually adopted which may compromise the quality of ...

Operational policy for hydropower dams must balance energy generation goals with environmental impacts under federal regulation, such as the Endangered Species and the Clean Water Acts. Multiple impoundments, reservoirs, outlet structures, and stochastic weather patterns complicate decision making to minimize impacts on downstream ecosystems. Currently, hydropower management to meet water quali...