"pond bottom"^^ . "The ground surface that lies beneath a pond."^^ . _:b1217299 . _:b1217298 . _:b1217300 . "ENVO:00000512"^^ . _:b1217297 . "pond bed"^^ . _:b1217299 _:b1217298 . "ENVO"^^ . _:b1217298 _:b1217297 . _:b1217297 . _:b1217300 . _:b1217297 . . _:b1217296 . . _:b1217300 . _:b1217296 . _:b1217296 _:b1217299 . _:b1217300 .