Going to....The Gulf of Thailand East Coast - One Two Go Koh Samui: The Quick Guide to Koh Samui 2014 - page 103

TheGulfofThailandisrelativelyshallow:itsmeandepthis45m,andthemaximumdepth
only 80m. The main rivers which empty into the gulf are the Chao Phraya (including its
distributaryThaChinRiver),MaeKlongandBangPakongRiversattheBayofBangkok,
and to a lesser degree the Tapi River into Bandon Bay in the southwest of the gulf.