To determine the measures and guidelines for flood alleviation on communities and commercial area of the city resulting from river flow through Nakhon Sithammarat Municipality. This is to protect the damages on public and private properties and the public utilities from the flood. If the damages cannot be avoidable, the measures shall be able to keep the damage to the minimum.

The services provided include :

• Study and analyze the drainage system and solve the flood problem.
  
  
• Propose and prioritize the measures and areas to be implemented for urgent or short-term and long-term implementation plans.
  
  
• Conduct the feasibility study of high-prioritized projects for the urgent implementation plan.
  
  
• Conduct the feasibility study of the work/project for the long-term implementation plan.
  
  
• Study and analyze the impact on the society, the organization and the environment and propose the appropriate mitigation measures for the short-term implementation projects together with the long-term implementation projects.
  
  
• Study and analyze the causes and factors that lead to the flood problem and the obstacle of the drainage in the overall picture of the study area and focus on the areas requiring urgent implementation.
  
  
• Study and analyze the flood protection capacity to cope with the runoff from various rivers, and the capacity to drain flooded water outside of the area under the existing situation together with the project under construction.
  
  
• Study and analyze the appropriate drainage and flood protection systems for the overall picture of the study area and the high-prioritized area to be implemented first.
  
  
• Feasibility design the feasible urgent implementation projects as a result of the feasibility study.