State-of-the-art analysis of irrigation water requirement

Abstract

Two ways of assessing irrigation water requirements are analyzed in the paper. The relationship between income and outcome water is reconstituted by the water balance equation, and the need for irrigation is determined. Besides of this equation, the needs for irrigation are determined by the CROPWAT model, on the basis of yield decrease of several crops grown on different types of soils. The main components of the water balance equation - effective rainfall and evapotranspiration - are also analyzed, to be used in the calculation of seasonal irrigation requirements.

U radu se obrađuje proračun potrebnih količina vode za navodnjavanje. Na osnovu jednačine vodnog bilansa uspostavlja se veza između prihoda i rashoda vode i određuju se potrebe za navodnjavanjem. Osim ove jednačine, u ovom radu se potrebe za navodnjavanjem određuju i pomoću proračuna padova prinosa gajenih useva na različitim vrstama zemljišta. Za ovaj slučaj u radu je primenjen model CROPWAT. U radu je, takođe, prikazan i savremen način određivanja efektivnih padavina i evapotranspiracije, kao glavnih komponenata vodnog bilansa, a u cilju proračuna potrebnih količina vode, tj. norme navodnjavanja.