The Chao Phraya River is the main river of the country Thai. Caused by a combination of the two main tributaries from the North is the river ping and Nan River at Tambon Pak Nam Pho, Amphoe mueang Nakhon sawan of Nakhon sawan province. Via sing buri, Ang thong, sing buri province of Ayutthaya, uthai Thani. Pathum Thani, Nonthaburi, Bangkok the Thai Gulf before Pak Nam sub-district zone between the end of home. Tambon bang Pu Muang Samut prakan. Amphoe Phra Samut Chedi of Samut prakan