The Department of Irrigation and Small Scale Hydropower is established under the Ministry of Agriculture and Forestry, with a view to manage the water source development (irrigation and small hydropower, flood protection and drainage systems in agricultural areas). Main tasks of the Department of Irrigation and Small Scale Hydropower are: to study and implement strategies and policies, to establish rational watershed development structures based on existing both surface and underground natural streams, to survey and determine areas for irrigation and small scale hydropower in accordance with the potentials of each area or region, to use foreign and international funds to develop the effectiveness of irrigation and small hydropower as established by the Ministry of Agriculture and Forestry. Parts II, III and IV regulate, respectively, the main duties, the organizational structure and the work system of the Department of Irrigation and Small Scale Hydropower.