Artist Reference: Roni Horn
The artist did quite a lot of work related to water and nature, while her works are very poetic and minimal.
Library of Water http://www.libraryofwater.is/landing.html
Still Water (The River Thames for Example) http://whitney.org/WatchAndListen/Tag?context=photography&play_id=30
Dialogue with FelixGonzalez-Torres http://www.guggenheim.org/new-york/exhibitions/past/exhibit/3155
Some research from the past: