History of Mae Klong Irrigation Project
In B.E. 2508 (A.D.1965), Royal Irrigation Department received a royal permission to use the name of His Royal Highness Prince Vajiralongkorn to be
a name of Vajiralongkorn Diversion Dam. Later in B.E.2544 (A.D.1965), His Majesty the King graciously renamed this Dam to “Mae Klong Dam”
therefore; the name of the project was changed from “Vajiralongkorn Diversion Dam Operation and Maintenance Project” to “Mae Klong Dam Operation and Maintenance Project”.
Project Location: 96 Moo 1 Muang Chum sub-district, Tha Muang district, Kanchanaburi province with an area of 1,565 rai
Mission and Responsibility: To facilitate an irrigation aspect, supply water for domestic consumption, flood mitigation, fishery, transportation and
Main Objective: To divert and distribute water for cultivated area in both banks of the Mae Klong River
Diversion Dam: Diversion dam 117.50 m. long with 8 drainage openings of 12.50 m. wide each, controlled by a steel radial gate of 7.50 m. high, and complete with a superstructure over the whole width for installation of lifting devices and communication bridge, maximum discharge of 3,100 m3/sec.,
and afflux level at EL.+22.00 m. (MSL)
Navigation Lock: Navigation lock was constructed in the cut-off channel close to the right of the dam with one 12.50 m. opening for navigation, a lock
basin of 26.50 m. wide by 217.00 m. long, a bascule bridge connecting with the one over the head of the pier upstream, and concrete fender posts extending 100 m. from the main structure to prevent boats and rafts from being drawn by current to collide the dam.
Cut-Channel: Cut-channel was excavated to change the water course and direct water to flow through the Dam, total length of 1,650 m.
Earth Closure Dam: Earth closure dam was constructed at the bend of the river to change the course of the river to flow past the cut-off channel to the Dam, with dam height of 18.50 m., based width of 180 m. and crest width of 75.00 m., complete with feeder road and canal.
Feeder Canal: Feeder canal started from the cut-off channel upstream of the Dam to the junction regulator to supply water to both banks.
Left Main Canal (1L and 2L): Left main canal can distribute water to cultivated area covering 6 provinces e.g. Kanchanaburi, Suphanburi, Nakhon Pathom, Ratchaburi, Samut Songkhram and Samut Sakhon.
Right Main Canal (1R and 2R): Right main canal can distribute water to cultivated area in Kanchanaburi (Thamaka), Ratchaburi and Phetchaburi provinces.
Feeder Canal Head Regulator: Feeder canal head regulator was constructed close to the Dam to control the water discharged into the canal, complete with
6 drainage openings of 6 m. wide and 5 m. high each, operated by a steel radial gate of 5.30 m. high, with a superstructure of 4.50 m. wide for lifting devices and for vehicles.
Junction regulator: Junction regulator was constructed to distribute water to the cultivated area in the left bank, complete with 5 drainage openings of 6.00 m. wide by 5.00 m. high, operated by a steel radial gate of 5.30 m. high, and superstructure of 4.50 m. wide for lifting devices and for vehicles.
Irrigation Project Development in Future: using a computer to control the drainage openings system (already started)
Irrigation Water Management Status of Mae Klong Dam Operation and Maintenance Project: Mae Klong Dam receives the water from Srinakarin and Vajiralongkorn dams which drains the water according to an agreement between Royal Irrigation Department and Electricity Generating Authority of Thailand.
4 main activities of water use are as follows:
1. Using water for agricultural purpose in dry and wet seasons for service areas of Mae Klong river basin e.g. Kanchanaburi, Suphanburi, Nakhon Pathom, Phetchaburi, Samut Songkham and Samut Sakhon provinces. By supplying water to distribution canal for helping cultivated areas in downstream both left and right banks of Mae Klong River – wet season cultivated areas of approximately 460,000 rai, having water demand of 1,230 MCM. or 95 m3/sec. during July – November.
- Dry season cultivated area of approximately 440,000 rai, with water demand of 1,028 MCM. or 85 m3/sec. during February – May.
- Wet season cultivated area of approximately 1,910,000 rai, with water demand of 2,397 MCM. or 185 m3/sec. during July – November.
- Dry season cultivated area of approximately 1,713,000 rai, with water demand of 2,056 MCM. or 170 m3/sec. during February – May.
2. To feed canals in the Mae Klong River by releasing the water from Mae Klong Dam at least 70 m3/sec. or 2,207 MCM./year
3. To help the Tha Chin River, approximately 1,190 MCM./year by Thasan-Bangpla canal 50 m3/sec. or 788 MCM./year. and Jorakhe samphan canal
22 m3/sec. or 402 MCM./year.
4. To supply water to Metropolitan Waterworks Authority for helping consumption in Bangkok amount 45 m3/sec.
Mae Klong Dam is the most important dam in Mae Klong River Basin Development Project, covering an area of 3 million rai in Suphan Buri, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkham and Samut Sakhon provinces. The Dam 117.50 m. wide, 1,650 m. long, upstream area of the Dam has beautiful scenery.
Mae Klong River Basin Being a Plenty of the Western Region
Mae Klong River Basin is in the western region of Thailand and close to Thailand-Myanmar border by Thanon Thongchai – Tanaosri mountain ranges where separates two countries; and it is a headwater of Mae Klong River in Tak and Kanchanaburi provinces. Moreover, there are 2 tributaries originating in these mountain ranges, the first tributary in Tak province called “Khwae Yai or Khwae Sri sawat” and the other one in Kanchanaburi province called “Khwae Noi or Sai Yok Noi”. The Khwae Yai and the Khwae Noi flow and join together at Pakprak sub-district in Kanchanaburi province where the Mae Klong river is formed. After that, the Mae Klong river flows through Kanchanaburi, Ratchaburi and Samut Songkham provinces with a length of 132 km. and watershed area of 30,836 km2 or 19.27 million rai, approximately.
Development of Mae Klong river basin is considered to be the river basin having a perfect irrigation system and 2 major water sources: Srinakarin Dam in Sri Sawat district and Vajiralongkorn Diversion Dam in Thong Pha Phum district in Kanchanaburi province. Both dam can store the water amount of 26.605 MCM. by Mae Klong Dam in Tha Muang district, lifting the water for distribution to the cultivated area, covering all downstream areas of Mae Klong river basin. It makes the areas plenty and fertile, and a better living of farmer and sustainability.
Regional Irrigation Office 13 is located at Mae Klong Dam in Muang Chum sub-district, Tha Muang district, Kanchanaburi province and is a functioning office in Mae Klong river basin area under Royal Irrigation Department, its duty and responsibility as follows:
1. Implementation on distributing and draining water for agricultural, domestic consumption, industrial purposes and others
2. Implementation on constructing of small and medium scale irrigation projects, royal initiative project and other activities designed by the Department
3. Operation and maintenance of irrigation structures
4. Prevention and solving of water shortage, flood and water quality problems in watershed area
1. Provincial Irrigation Offices
Provincial Irrigation Offices are responsible for water allocation, operation and maintenance of medium scale irrigation projects and special projects through providing supplementary water sources to prevent drought, flood and water quality problems both in irrigated area and outside irrigated area, having a responsible area of approximately 17,151,293 rai under 4 provincial irrigation offices: Kanchanaburi, Nakhon Pathom, Ratchaburi and Samut Songkham Irrigation Offices.
2. Operation and Maintenance Projects
Operation and Maintenance Projects are responsible for collecting, storing, controlling and allocating water from Mae Klong Yai Dam for beneficial area, covering 4 provinces e.g. Kanchanaburi, Nakhon Pathom, Ratchaburi and Samut Songkham, totaling 3,260,900 rai, 11 Operation and Maintenance Projects as follows: Damnoen Saduak, Nakhon Chum, Nakhon Pathom, Kamphaeng Saen, Ratchaburi Right Bank, Ratchaburi Left Bank, Bang Len, Songpeenong, Phanom Thuan, Thamaka, and Mae Klong dam.
Important Water Resources Development Project
Mae Klong Yai Irrigation Project consists of a headwork of Mae Klong Diversion Dam receives the water from 2 water sources: Srinakarin Dam with storage capacity of 17,745 MCM.; Vajiralongkorn Dam with storage capacity of 8,860 MCM. The both dam drains the water to Mae Klong Dam for activities in irrigation aspect amount 9,800 MCM./year as the following details:
1. Supplying water for cultivation and domestic consumption in wet season, 2,500 MCM.
2. Supplying water for cultivation and domestic consumption in dry season, 2,500 MCM.
3. Controlling salinity and preventing wastewater, not less than 2,000 MCM./year
4. Supplying water for domestic consumption, cultivation, wastewater treatment for Tha Chin River in Suphanburi, Nakhon Pathom and Samut Sakhon provinces, 1,500 MCM.
5. Supporting Metropolitan Waterworks Authority’s mission, 600 MCM.
In addition, Regional Irrigation Office 13 has the responsible projects as follows: 8 medium scale irrigation projects with storage capacity of 131.48 MCM. and projects area of 114,300 rai; 223 small scale irrigation projects with storage capacity of 56.74 MCM. and projects area of 285,000 rai; as well as 58 electric pumping stations with service area of 137,500 rai, covering 2 provinces: Kanchanaburi and Ratchaburi.