https://www.stockholmresilience.org/research/research-news/2019-10-25-hidden-treasures-beneath-the-surface-water.html
Ditches, fishponds, weirs, reservoirs, fish ladders, and irrigation channels harbour unexplored...
Little research has been done on the untapped potential and unintended consequences of human-made water bodies like ditches, fishponds, weirs, reservoirs, fish...
fish laddersirrigation channelsditchesfishpondsweirs