In the course of long-term operation hydroelectric units, they are subject to wear and tear, which negatively affects power generating capacity station. The existing repair technology provides restoration geometric dimensions impeller chamber hydraulic unit using an austenitic cladding layer. However, this is characterized by occurrence cracks delamination deposited layer during post-repair ope...

Studies on helminthfauna of marsh deer Blastocerus dichotomus Illiger, 1815 are rare, although helminthic diseases are an important cause of mortality in these animals. Fifteen male and female adult marsh deer from Sergio Motta's hydroelectric power station flooding area at Paraná River which died during the capture and quarantine procedures, between 1998 and 1999, were necropsied. Three tremat...

Many water resources systems are characterized by multiple objectives. For multiobjective optimization, typically there can be no single optimal solution which can simultaneously satisfy all the goals, but rather a set of technologically efficient noninferior or Pareto optimal solutions exists. Generating those Pareto optimal solutions is a challenging task and often difficulties arise in using...

This paper presents a profit-based model for short-term hydro scheduling adapted to pool-based electricity markets. The objective is to determine a feasible operation of a set of coupled hydro units belonging to a small or medium-size hydroelectric company. The company is assumed to be price-taker, and therefore, market prices are considered exogenous variables and modeled via scenarios. In ord...

The Karahnjukar dam spillway is the spillway for the Halslon reservoir, the main reservoir for the 690 MW Karahnjukar Hydroelectric Project in East Iceland. The spillway consist of a 140 m long overflowing weir with a capacity of 2250 m3/s which discharges into a side channel, followed by a 450 m long chute. The chute terminates at a canyon edge where the jet drops some 100 m into a narrow gorg...

Abstract This work seeks to discuss the conception of affected and reconfiguration territory social lives with observation analysis two communities not considered by Jirau HPP: that small Village Penha. The research is characterized as theoretical-descriptive, based on issues related occurrence impacts construction operation hydroelectric plants, fieldwork was performed non-participant observat...

Hydropower represents approximately 20% of the world’s energy supply, is viewed as both vulnerable to global climate warming and an asset to reduce climate-altering emissions, and is increasingly the target of improved regulation to meet multiple ecosystem service benefits. It is within this context that the recent decision by the United States Federal Energy Regulatory Commission to reject stu...

This paper presents an constructive neural network model for seasonal streamflow forecasting. This Surface water hydrology is basic to the design and operation of the reservoir. A good example is the operation of a reservoir with an uncontrolled inflow but having a means of regulating the outflow. If information on the nature of the inflow is determinable in advance, then the reservoir can be o...

This paper presents an efficient and reliable swarm intelligence-based approach, namely elitist-mutated particle swarm optimization EMPSO technique, to derive reservoir operation policies for multipurpose reservoir systems. Particle swarm optimizers are inherently distributed algorithms, in which the solution for a problem emerges from the interactions between many simple individuals called par...

This paper presents an overview of the effects of electric power generation and transmission on indigenous communities in Brazil. According to data from FUNAI (the Brazilian government's Board of Indian Affairs), there are 156 cases of direct impact, present or future, of the electric power sector on Indian settlements geographically distributed throughout Brazil, 65% of which are located in th...