Bangkok Flood Plan: High-Budget Projects Not Yet Started

Thansettakij•Economy•22d ago

Reader Briefing

Major high-budget flood diversion projects for Bangkok remain unconstructed or recently approved despite engineering solutions being known since 2012.

•Plans 1, 2, 3, and 4 for Bangkok water drainage and diversion have a combined budget of over 480,000 million baht.
•Plans 1, 2, 3, and 4 were either recently approved by the Cabinet in September 2026 or are still under study.
•Plan 7, which began in 2019, has been extended until 2030.
•Engineering solutions regarding floodways and drainage efficiency have been known since 2012.

Overview

•Plans 5, 6, 8, and 9 are completed projects with low budgets.
•Plans 1, 2, 3, and 4 have a combined budget of over 480,000 million baht, nearly 500,000 million baht.
•Plans 1, 2, 3, and 4 received Cabinet approval in September 2026 or are still in the study phase.
•Plans 1, 2, 3, and 4 have not yet started construction.
•Plan 7 started in 2019 and has been extended to 2030.
•Thailand has known the engineering requirements for floodways and drainage efficiency since 2012.
•Engineering solutions since 2012 include the need for floodways, improved east-west drainage, and serious land-use planning for water retention areas.

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Key Entities

Place

Bangkok(กทม.)ℹ️

The area targeted for protection by flood drainage and diversion plans.

Chao Phraya Basin(ลุ่มเจ้าพระยา)

The basin where flood solution plans are being implemented.

Thailand(ประเทศไทย)ℹ️

The country that has known the engineering answers for flood management since 2012.

Organization

Cabinet(ครม.)

The body that approved Plans 1, 2, 3, and 4 in September 2026.