This is an interesting paper addressing various species of submersed plants and the effects of water current on them.
http://estuariesandcoasts.org/journal/ESTU2001/ESTU2001_24_1_1_17.pdf
Regards,
Tom Barr
http://estuariesandcoasts.org/journal/ESTU2001/ESTU2001_24_1_1_17.pdf
Regards,
Tom Barr