This preview shows page 1. Sign up to view the full content.
Unformatted text preview: stations, which resulted in better utilisation of existing power
Hydropower generation can vary substantially from one year to
another, depending on precipitation and inflow. Precipitation levels vary
between regions, between seasons and between years. Inflow is high
during the spring thaw, but normally decreases during summer and towards
autumn. Autumn floods generally result in an increase before the onset of
winter, when inflow is normally very low. The spring flood comes later in
inland regions and in the mountains than near the coast and in lowland
areas. Precipitation varies substantially from year to year and is more than
twice as high in the wettest years as in the driest ones.
Many power plants can store water in reservoirs and are referred to
as reservoir power plants. The reservoirs allow water to be retained in flood
periods and released in drought periods, typically in the winter. Water is
collected in the reservoirs when inflow is high and consumption low.
Normally, water will be drawn off during autumn and winter, when electricity
demand is the highest. In spring and summer, electricity...
View Full Document
This document was uploaded on 03/30/2014.
- Summer '14