SR-1 : Crop water requirement field efficiencies and irrigation planning

Abstract

Design of irrigation systems and judicious application of irrigation water need reliable information on the consumptive use of various crops grown in the command area. In recent past, studies on scheduling of irrigation based on soil water status, plant water status, irrigation water availability etc. have been done to develop irrigation scheduling model for different crops under varying climatic conditions. The basic behind all such studies is to minimise various water loses involved in an irrigation process so as to increase irrigation efficiency.

A review of different research works done at national in:: international levels in the fields of crop water requirement, field efficiency and irrigation planning is presented this report. On the basis of the present review work the following research aspects have been identified in the report :

(i)To find appropriate formula of evapotranspiration computation for an area by doing comparison between experimental methods and empirical formulae.

(ii)Irrigation scheduling for various crops based on solution of Richards equation.

(iii) Determination of water application points in a field to minimise problem of non- uniform distribution of irrigation water.

(iv) Selection of cropping pattern for a particular region depending upon the carrying capacities of canals in that region.

(v) Development of instrumentation for irrigation scheduling.

(vi) Selection of irrigation method for a Particular crop to get maximum irrigation efficiency.