Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
Results
Site specific irrigation requirement of major crops was determined based on data availability
for future scenarios, Hargreaves and Samani (1985) method was used instead of FAO Penman-
Monteith method (Allen et al., 1998) for ETo calculation. Crop water requirement was
estimated for pigeon pea, kharif maize, rabi maize and groundnut. The ensemble data of CMIP
5.0 corresponding to two emission scenarios RCP 4.5 and RCP 6.0 was used. During the base
line period, the irrigation requirement of pigeon pea, kharif maize, rabi maize and groundnut
varied spatially from 87.9 mm to 267.2 mm, 32.7 mm to 189.9 mm, 306.1 mm to 373.6 mm,
and 28.4 mm to 155.7 mm respectively, by 2030s under RCP 4.5, for pigeon pea, kharif maize,
rabi maize and groundnut, it is expected to vary from -10.7 to 7.6 %, -29.8 to 17.5%, 1.5 to 3.6
% and -5.9 to 3.0 % respectively. For RCP 6.0, for pigeon pea, kharif maize, rabi maize and
groundnut, it is expected to vary from -9.3 to 12.7 %, -28.3 to 17.9%, 1.2 to 3.5 % and -4.2 to
3.5 % respectively. According to the results, climate change has a considerable impact on the
sustainability of the prevailing cropping system in Krishna Basin.
104 | Page Resilience through land and water management interventions, water management and governance