lagarfossvirkjun hydropower station dam on lagarfljot river, iceland. brown glacial water tumbling from the dam

barrier bridge brown cascade concrete dam ecology electricity energy environment flood gates flow gate glacial glacier hydroelectric hydroelectricity hydropower iceland icelandic industry lagarfljot lagarfoss lagarfossvirkjun lake landscape large mountain nature plant power generation station renewable reservoir river rock source stream supply sustainability system travel tumbling water waterfall iceland dam