14 KnowHow i 2010 i 3 15 KnowHow i 2010 i 3 HenK jAn VAn essen nijhuis pompen bv has receive D an or Der from fish flow innovations to supply a fish-frien Dly pump to waternet, the water authority for the amster Dam area . w hen in opera- tion, this pump will allow 100 percent of the eels an D at least 97 percent of the fish to pass through it unharme D. t hese results were obtaine D During a practical test hel D un Der the supervi

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