river
río
spring (natural source)
manantial
riverbed
lecho
basin
cuenca fluvial
to flow into…
desembocar en…
tributary
afluente
bank (of a river)
orilla, ribera
current, stream
corriente
downstream (adv)
río abajo
upstream (adv)
río arriba
inundation
inundación
flooding
riada
to overflow
desbordarse
to flood
inundar
shallows (shoal)
bajo arenoso
rapids
rápido
dam
presa
canal
canal
reservoir
lago artificiale
sluice, lock
esclusa
water body (pond etc)
cuerpo de agua
swamp, bog
pantano
marsh
ciénaga
whirlpool
remolino