In this article we will discuss about:- 1. Surface Irrigation Methods 2. Calculating Depth of Irrigation 3. Mathematical Models 4. Implements. Surface Irrigation Methods: These can be broadly classified as follows: 1. Wild flooding or uncontrolled flooding. 2. Controlled flooding, further classified as: (i) Border method, (ii) Check basin method or flat-bed method, and (iii) Basin method. 3. Furrow irrigation, [...]
In this article we will discuss about:- 1. Hydraulics of Borders 2. Unit Stream Approach 3. Evaluation of Border Irrigation. Hydraulics of Borders: The hydraulics of border irrigation consists in developing equations relating the flow phenomena. The fluid flow phenomenon of surface irrigation is a case of unsteady non-uniform and spatially varied open channel flow over a porous bed. It [...]
The choice of irrigation method should be based on the surface topography, soil characteristics, crop to be grown, irrigation source, depth of water application, labour requirement, level of technology and layout and management. The criteria to be adopted for selecting irrigation method are given in Table 13.4. The irrigation method generally adopted by the farmers in India is discussed below: [...]