To evaluate the furrow irrigation system, rate of advance and recession are observed as in case of border strips. However, the ring infiltrometer data will not be applicable to furrows as in case of furrows, only a part of the soil is exposed to the water. The intake rate in the furrows is determined either by the ponding method or [...]
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 approaches for estimating crop water requirements were based upon transpiration ratio and depth-interval-yield data. Transpiration ratio is the quantity of water required to produce a unit amount of dry matter. Some considered dry matter to be the weight of the shoot while others considered it as the weight of the economic produce of the crop. This ratio was considered [...]