Technical Notes on On-Farm Water Management

1. Basic knowledge for on-Farm water management. 1.1 Introduction. 1.2 Concept of on-farm water management. 1.3 Irrigation roles in rice cultivation. 1.4 Water balance. 1.5 Water requirements. 1.5.1 Presaturation. 1.5.2 Normal growth period. 1.6 Rotational irrigation. 2. Planning, design and construction of pilot farms. 2.1 Introduction. 2.2 Planning concept. 2.2.1 different methods of on-farm development. 2.2.2 Size of field block. 2.2.3 Provision of on-farm canals. 2.2.4 Provision of farm road. 2.3. Layout planning of on-farm facilities. 2.3.1 General. 2.3.2. Premilinary survey and study. 2.3.3 Layout of field canals. 2.3.4 Review of layout planning 2.3.5 Surveying. 2.4. Design of on-farm facilities. 2.4.1 Design water discharges. 2.4.2 Hydraulic design conditions. 2.4.3 Design of on-farm facilities. 2.5 Construction. 2.5.1 Procedures of construction work. 2.5.2 Construction supervision. 2.5.3 Land levelling in pilot farm no.3. 3. Water management trial. 3.1 Water management criteria. 3.1.1 Necessity of criteria. 3.1.2 Proposed criteria. 3.1.3 Target of water management trial. 3.2 Routine work of water management trial. 3.2.1 Proposed procedures. 3.2.2 Prerequisite conditions of water management trial. 3.2.3 Required frequency of the water management trial. 3.3 Water management trial in each pilot farm. 3.3.1 Pilot farm no.1. 3.3.2 Pilot farm no.2. 3.3.3 Pilot farm no.3. 4. Maintenance of pilot farms. 4.1 General. 4.2 Inspection patrol. 4.3 Maintenance work. 4.3.1 Regular work. 4.3.2 Emergency work. 4.4 Maintenance of Batas. 4.4.1 Roles of batas and inlet/ outlet. 4.4.2 Fixed route of water flow. 4.4.3 Maintenance of batas. 4.4.4 Maintenance of inlets/outlets.