Khlong

A khlong (also commonly spelled klong; , ) commonly refers to a canal in Thailand. These canals are spawned by the Chao Phraya, the Tha Chin, the Mae Klong Rivers, and their tributaries particularly in the low-lying areas of central Thailand. The Thai word "khlong" is not limited to artificial canals. Many smaller rivers are referred to as "khlongs", followed by the name of the stream.
Khlongs in Bangkok.
 there are 1,682 canals in Bangkok, totalling 2,604 kilometres in length. Nine canals are primary flood drainage conduits.
In years past, the Thai capital was crisscrossed by khlongs, and so gained the nickname, "Venice of the East". Khlongs were used for transportation, for floating markets, but also for sewage disposal. Today, most of the khlongs of Bangkok have been filled in, although the Thonburi side of Bangkok (covering areas west of Chao Phraya River) still retains several of its larger khlongs.
Khlong Saen Saep in central Bangkok is a significant thoroughfare in traffic-congested Bangkok's public transportation network.
Floating markets.
Traditional floating markets now exist mainly as tourist attractions. The best-known is the Damnoen Saduak floating market in Ratchaburi Province.