Global scenarios for climate change indicate changes in air temperature, precipitation and hence runoff in Norway. The predicted impacts will vary between regions, and will strongly affect running waters and their ecosystems. The frequency and magnitude of events like floods, droughts, high erosion, sub-surface and surface water interchange, ice formation and ice break-up will be altered as well as changes in mean conditions. New hydrological regimes will lead to changes in physical processes in regulated rivers and their ecosystem.

Climate changes giving altered hydrological regimes will also cause changes in the operation of hydropower systems. Climate change impacts must always be considered together with any hydro operational changes when studying physical processes and ecosystem impacts in regulated rivers. The feedback and inter-correlation of climate change and regulation need to be analyzed carefully.

Articles:

• Climate change effects on discharge, hydropower production, water temperature, ice conditions and their impact on Atlantic salmon in the regulated Orkla river in Norway - Abstract
• Climate change effects on discharge, hydropower production, water temperature, ice conditions and their impact on Atlantic salmon in the regulated Orkla river in Norway - Introduction

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Powerpoint presentations:

• Climate change impacts on hydrology, hydropower production, physical processes and fish population in a regulated river in Norway
• Climate change effects on natural runoff, hydropower production and regulated discharge in a regulated river in Norway
• Climate change effects on physical conditions and their impact on Atlantic salmon in a regulated river in Norway
• Climate change effects on discharge, hydropower production, water temperature, ice conditions and their impact on Atlantic salmon in the regulated Orkla river in Norway

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