Pasak Jolasid Dam opens 7 gates for heavy rain prep

Khaosod•Society•6d ago

Reader Briefing

Pasak Jolasid Dam opened all seven spillway gates on September 30, 2026, to manage water levels exceeding 100% capacity.

•Pasak Jolasid Dam opened all 7 gates on September 30, 2026, after water levels reached 106.80% of normal capacity.
•Water discharge will increase daily to 400 cubic meters per second until October 2, 2026.
•The Thai Meteorological Department predicts heavy rain in lower Northern Thailand, Central Thailand, and Lop Buri province from October 3–6.
•Areas downstream of Rama 6 Dam, specifically Tha Ruea District in Phra Nakhon Si Ayutthaya, are advised to monitor the situation.

•Pasak Jolasid Dam currently holds 930.78 million cubic meters of water, representing 106.80% of its normal storage capacity.
•Pasak Jolasid Dam opened all 7 spillway gates on September 30, 2026, for the first time this year to accelerate water drainage.
•Water is flowing into Pasak Jolasid Dam at over 550 cubic meters per second, or 47.54 million cubic meters per day.
•Water discharge from Pasak Jolasid Dam will be increased daily to 400 cubic meters per second until October 2, 2026.
•The Thai Meteorological Department forecasts a monsoon trough over lower Northern Thailand, Central Thailand, and Lop Buri province between October 3–6, leading to heavy rain.
•The increase in water discharge is expected to raise the water level of the Pasak River by approximately 1.00–1.50 meters.
•Residents along the Pasak River and risk areas, particularly in Tha Ruea District, Phra Nakhon Si Ayutthaya, are warned to monitor government news closely.
•Irrigation Office 10 and Pasak Jolasid Dam will continue to monitor rainfall and inflow to manage water and reduce impacts on residents.

Full article content is available on the original source.

Pasak Jolasid Dam(เขื่อนป่าสักชลสิทธิ์)ℹ️

A dam in Phatthana Nikhom District, Lop Buri Province, currently discharging water beyond capacity.

Pasak River(แม่น้ำป่าสัก)ℹ️

The river expected to see a water level increase of 1.00–1.50 meters.

Rama 6 Dam(เขื่อนพระราม 6)

A dam downstream of which residents must monitor water levels.

Tha Ruea District, Phra Nakhon Si Ayutthaya(อ.ท่าเรือ จ.พระนครศรีอยุธยา)

An area identified as needing surveillance due to rising water levels.

Phatthana Nikhom District, Lop Buri Province(อ.พัฒนานิคม จ.ลพบุรี)

The location of Pasak Jolasid Dam.

Pasak Jolasid Dam Water Transmission and Maintenance Project(โครงการส่งน้ำและบำรุงรักษาเขื่อนป่าสักชลสิทธิ์)

The organization responsible for opening the 7 spillway gates at Pasak Jolasid Dam.

Thai Meteorological Department(กรมอุตุนิยมวิทยา)ℹ️

The agency that predicted a monsoon trough and heavy rain from October 3–6.

Irrigation Office 10(สำนักงานชลประทานที่ 10)

The office monitoring rainfall and inflow to manage water for Pasak Jolasid Dam.