COMPUTER AIDED DIAGNOSTIC ANALYSIS OF AN IRRIGATION SYSTEM

Abstract

The Diagnostic Analysis (DA) of irrigation system involves analyses of variety of field experiment/survey data. These require reference to charts/tables, mathematical functions and going through lengthy and repeatitive calculations. Advances in technology have incorported tremendous capabilities into personal computers (P.C.$). These can be used for storage of calibration charts/tables,mehamatical functions, instructions/specifications. Therefore, their use make these analyses much easier, less time consuming, accurate and uniform. The use of P.C.s is becoming very common now-a-days and these are available ea! sily Th;_~.~sz~aon—has en up to develop P.C. based comprehensive computer programs, which can be effectively used in diagnostic study of an irrigated agricultural system. This study covers the development and use of following computer programs: 1. Agroclimatic classifications based on selected methods and determination of relevant soil properties. 2. Programming application using flow measuring devices (Parshall Flume, Cutthroat Flume, H-Flumes, Rectangular Sharp crested weir, Circular sharp crested orifice, non-modular type pipe-outlet) and current meter observations.These devices / methods were selected on the basis their popularity. } 3. Steady state water loss computation in irrigation channel by Ponding Method. 4. Evaluation of performance of irrigation method by Advance-Recession Method. 5. Preparation of otational water distribution schedule of a%chaklunder study and comparing its existing schedule with the computed schedule. 6. Determination of irrigation water requirements (monthly, mean,peak) for a given cropping pattern. Potential evapotranspiration is evaluated using Blaney Criddle, Modified Penman, Radiation, Jensen, Christianen Methods and crop co-efficients on the basis of FAO procedures. 7. Evaluation of resource use efficiency using Cobb-Doglus function for economic analysis the system. Recommendations have been made for further work.