Natural resources and the environment

Water resources

Based on hydrology, the water resources in Chumphon are collectively called the first part of the river basin on the eastern coast of southern Thailand. It is composed of short rivers and canals that originate in the western mountain ranges, such as Tanao Sri Mountain Range, and run into the Gulf of Thailand. These river branches and river basins are:

Main river branches

  • Klong Tha Tapao River Branch
    It is a short river originating in the western mountain ranges in Prachuap Khiri Khan Province, running through Tha Sae and Mueang Districts of Chumphon Province into the Gulf of Thailand at the Chumphon River Delta. The total length of the main river, and its branches is around 867 kilometers. The average water mass through the year is 1,440 cubic meters. The overall water quality is classified as standard quality for surface water (type 3) which is suitable to the living of aquatic animals. Heavy metals are found in many areas, which include lead, mercury, chromium, and cadmium, but in small amounts. But the level of Coliform bacteria is quite high, since the river runs through community areas, where waste water contaminates the river water. Mainly, people use the river water for the agriculture and industry. Only where the river does not run through the residential areas, then it is used for consumption and recreation.
  • Klong Chumphon River Branch
    The river originates from the mountain range in Park Jun Subdistrict, Kra Buri District, Ranong Province, running eastwards to Baan Don Samor, through Wang Phai Subdistrict, Baan Khun Krathing, Tak Dad Subdistrict of Chumphon Province. Its length is around 50 Kilometers, and the river has water in all seasons.
  • Klong Sawi-Tako River Branch
    The river originates from the mountain in La-un Neur Subdistrict, La-un District, Mueang District of Ranong Province. The river runs northwards, then turns eastwards into Sawi District, through Khao Thalu Subdistrict, Nasak, Thung Raya, Sawi, Na Poh, Pak Preak, Tha HIn, and then into the sea at Daan Sawi Subdistrict, Sawi District. Its length is around 75 kilometers, and the river has water in all seasons.
  • Klong Lang Suan River Branch
    The river originates in Chumphon and Surat Thani Provinces, and runs through Phato and Lang Suan District of Chumphon Province into the Gulf of Thailand at the Lang Suan River Delta. The total length of Lang Suan River and its branches is around 497 kilometers. The overall water quality is classified as standard quality for surface water (type 3) which is suitable to the living of aquatic animals. When the river runs through the residential area, the water quality is slightly lower. These areas are Phato Sanitary District and Lang Suan Sanitary District where the level of contamination and the quantity of zinc and coliform bacteria is higher than in other areas due to waste water from the residential areas. Mostly, the water is used for the agricultural purpose. At the river source and its end, people use the water for fishery and aquatic animal breeding, recreation and water transportation.
  • Klong Lamae River Branch
    The river originates in Phato Subdistrict, Phato District, and runs eastwards into the sea in Lamae Subdistrict, Lamae District. It is around 36 kilometer long and has water in all seasons.

The minor river branch

  • Rap Ro River Branch
    The river originates in Tanao Sri Mountain Range, at the Thai-Burmese border in the northwest of Pathio District, and runs southwards through the mountains to Tha Sae District. Then it runs eastwards through Rup Roh District, Tha Kharm, and merges with Tha Sae River Branches at Na Kra Tam District, to become Tha Ta Phao River. The total length is around 72 kilometers, and it has water throughout the year.
  • Tha Sae River Branch
    The river originates in the mountain range in Bang Saphan District, Prachuap Khiri Khan Province, and runs through Sa-lui, Kuring, Tha Sae, Na Kradarn, Tha Sae District. It merges with Rup Ror River and together becomes Tha Ta Phao River. The total length is around 77 kilometers, and it has water throughout the year.
  • Sawi Thao Canal
    The canal originates in Thung Raya Subdistrict, Sawi District, and runs eastwards through Na Poh Subdistrict, and then turns to the northeast through Park Praek Subdistrict, then runs into the sea at Wisai Tai Subdistrict, Sawi District. The total length is around 30 kilometers, and it has water throughout the year.
  • Tako Canal
    The canal originates in Lang Suan District, and runs through Thung Tako, Thung Takrai, Park Tako Subdistrict. The total length is around 120 kilometers, and it has water throughout the year.