🏞️⬆️⬇️🌊

#tidal estuary #tidal river #water level change #ebb and flow #tide cycle #estuary dynamics

🌊📉📈🛶

#lockage #water level change #boat elevation #lock chamber #filling lock #emptying lock #vessel transit

🚢⬆⬇️🚢

#canal locks system #water level change #ship elevation #gatun locks #miraflores locks #ship lift

🛶↕️💧

#canal boat lift #boat lock #water level change #inland navigation #boat elevator

🛥️🧱↕️💧

#canal lock #boat lift #water level change #lock gates #navigation lock #waterway engineering #canal system

🚢🔒⬆️

#canal lock #shipping canal #barge transport #water level change #lock gate

🏖️↕️🌊

#tide cycle #high tide #low tide #shoreline #coastal zone #littoral zone #water level change