CROP WATER DEMAND ESTIMATION FOR FEW RABI CROPS USING CROPWAT 8.0 & AQUACROP 6.1 MODELS

The study shows that for both models crop water requirement and crop irrigation scheduling in Rabi season growing in study area (Allahabad, Karchana block) region. The daily ETc and monthly ETc is deferent through both model and net irrigation, total crop water requirement, gross irrigation are compensate the rabi season growing crops in study area Allahabad region. The study results CROPWAT 8.0 and AQUACROP 6.1 showed that daily ETc 0-4.50 and 0-6.0 mm/day. The CROPWAT 8.0, Total Crop Water Requirements for wheat 262 mm, Total Net Irrigation Requirement for wheat is 304.9 mm, & Total gross irrigation requirement for wheat 438.4 mm, for Barley CWR is 247.8mm, GIR 426.9, & NIR is 298.8 mm, for Mustard CWR is 217.4 mm and NIR 261.7 mm, & GIR 373.9 mm, CWR for pea 205.5 mm, NIR 264.5 mm, & GIR 426.9. The AQUACROP 6.1 model CWRs for wheat 536 mm, NIR 421.5 mm, & GIR 601.9 mm, for Barley CWRs 533 mm, NIR 300.8 mm, & GIR 429.7 mm, CWRs for Mustard 446 mm, NIR 339.5 mm, & GIR 513.0 mm, CWRs for Pea 593 mm, NIR is 357.1 mm, & GIR 510.0 mm. Thesis study proved that CROPWAT 8.0 model is useful for calculating the crop water irrigation needs for the proper management of water resources.