Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) walking on mud dam wall. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) (T27) walking on bund / dam wall trail. Kanha National Park, Central India. Camera trap image.

Alan Williams / Dam of Lake Vyrnwy reservoir, water flowing down dam wall following heavy rainfall, surrounded by forest. Llanwddyn, Montgomeryshire, Powys, Wales, UK. June 2019.

Steven David Miller / Lake Argyle reservoir dam wall and outflow, aerial view. Reservoir dammed in 1971 for Ord River Irrigation Scheme. The Kimberley, Western Australia. 2017.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) tigress (T27) with one of the three sub-adult female cubs, passing over dam wall. Tourist in safari vehicle watching from other side of pond. Kanha National Park,...

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) with one of the three sub-adult female cubs, passing through dam wall. Tourist in safari vehicle watching from other side of pond. Kanha National Park, Central In...

Ashley Cooper / Lake Eucumbene in the Snowy Mountains showing low water levels, during drought which lasted from 1996-2011 Lake Eucumbene, New South Wales, Australia, February 2010.

Ashley Cooper / Lake Eucumbene in the Snowy Mountains with very low water level during the drought which lasted from 1996-2011. New South Wales, February 2010.

Ashley Cooper / Lake Eucumbene in the Snowy Mountains with very low water level during the drought which lasted from 1996-2011. New South Wales, February 2010.

Ashley Cooper / Lake Success near Porterville, Bakersfield is at 7% capacity during severe drought, California, USA October 2014.

Ashley Cooper / Overspill, standing high and dry at the Hoover Dam on Lake Mead, following a four year long drought. Nevada, USA, September 2014.

Ashley Cooper / Intake towers for the hydro plant on the Hoover Dam, Lake Mead, Nevada, USA. The lake is at a very low level due to the four year long drought. September 2014.

Ashley Cooper / Lake Isabella near Bakersfield, at less than 13% capacity during the 2012-2017 California drought. California, USA, September 2014.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought. Border of Nevada and Arizona, USA.

Ashley Cooper / The Hoover Dam and Lake Mead hydro electric plant, which is at very low levels following a four year drought

Steven David Miller / Sandstone cliffs along Upper Ord River, below the Ord River dam wall, Kununurra, Western Australia, July 2010

Rick Tomlinson / Kariba Dam, Zimbabwe is located approximately halfway down the Zambezi River. The dam was surrounded by controversy, both environmentally and socially, it is an impressive monument to man's engineerin...

Theo Allofs / Bengal Tiger (Panthera tigris tigris) lying on dam wall cooling off during the heat of the afternoon in April during the dry season, India

Robert Thompson / Drystone wall with dam wall of Silent Valley Reservoir in background, surrounded by mountains of Slieve Bearnagh, Ben Crom, Slieve Binnian, Slieve Lamagan and Slieve Commedagh. Mourne Mountains, Count...

Graham Eaton / Broken dam wall of Llyn Eigiau, breached on 2nd November 1925 flooding the village of Dolgarrog and killing 16 people. Snowdonia National Park, Wales, UK. August 2019.

Milan Radisics / Wall of dam, built around abandoned pond used for the disposal and stacking of phosphogypsum in Huelva, Southern Spain. Phosphogypsum is a radioactive by-product in the manufacture of phosphoric acid,...

Graham Eaton / The dam wall of Llyn Eigiau, that was breached on 2 November 1925 flooding the village of Dolgarrog and killing 16 people. Dolgarrog, Snowdonia National Park, Wales, UK, August