barcis artificial lake drained of water, italy

barcis lago di lake january italy europe winter artificial reservoir water birds ducks geese wildlife habitat environment waterfowl wildfowl pordenone friuli venezia giulia friulivenezia dam hydroelectric energy power electricity production routine maintenance drained empty mountains alps alpine engineering work basin upkeep hydraulic mud silt bed floor construction countryside rural brown travel val cellina friulian dolomites valley european union eu river rivulet stream dolomiti friulane natural park site outside outdoors outdoor aprilis north east south eastern southern italian nature dry valcellina