Duties and responsibilities of the Royal Irrigation Department according to the Ministerial Regulation Organizing the Royal Irrigation Department, Ministry of Agriculture and Coorperatives B.E. 2554 include:
1. Implementation of activities aimed at achieving, collecting, storing, controlling, distributing, draining or allocating water for agricultural, energy, household consumption or industrial purposes under irrigation laws, ditch and dike laws and other related laws.
2. Implementation of activities related to prevention of damages from water; safety of dams and appurtenant structures; safety of navigation in commanded areas and other related activities that may not be specified in annual plan.
3. Implementation of land consolidation for agriculture under the Agricultural Land Consolidation Act.
4. Implementation of other activities designated by laws or properly assigned by Cabinet or Minister.