EXPERT SYSTEM FOR MANAGING SPRINKLER IRRIGATED NEW RECLAIMED LAND

Abstract

Accurate estimation of actual crop evapotranspiration (ETa) as a parameter of irrigation scheduling is very critical for efficient use of limited irrigation water resources. The aims of this investigation were to build an expert system for selection and design of center pivot system irrigation under different field conditions, study the effect of coefficient of uniformity (CU) and distribution uniformity for center pivot irrigation system, study the effect of the precise estimation of daily actual crop evapotranspiration (ETa) on maximizing yield and improved water use efficiency. A rule-based program named CPISM-ES (Center Pivot Irrigation System Management- Expert System) was coded and compiled using python-3.7.2 language. The program was verified using ready-to-use software programs (cropwat-8 and climwat 2) for estimating the daily reference evapotranspiration and a spreadsheet named the (FAO56Ax8.xls) introduced by FAO-56 for estimating the irrigation water management parameters. It also was validated by carrying out a field experiment at site :-El Salhyia and Wadi El-Natrun (11.2 m above sea level, 30,35°N,30,26°E) (55 m above sea level, 30.9°N, 29.7°E), was obtained from several different sources. The irrigation expert system aims to provide the farmers by the irrigation expertise to determine the exact water needed at exact time according to the crop requirements and the environmental factors which effect factors. The experiment included the following factors: a) obtaining climatic data from a weather station b) estimation crop evapotranspiration) coefficient of uniformity (CU) and distribution uniformity for center pivot irrigation system