Bangkok Khlongs and canals - A khlong also commonly spelled Klong is the Thai word for a canal. These canals are fed by the Chao Phraya, the Tha Chin, the Mae Klong Rivers and tributaries. Once upon a time Bangkok was crisscrossed by canals and so gained the name Venice of the East. The khlong canals were used for transportation and floating markets. Most of the khlongs of Bangkok have been filled in and converted into roads, which has resulted in Bangkok's famous flooding after the monsoons as water cannot flow properly into the Gulf of Thailand. The canals and the Chao Phrya River have long been transportation artery for a vast network of ferries, water taxis, longtails and express commuter boats. More than 15 boat lines operate on the river and canals of the city.