To stabilise yields against variations in moisture availability, irrigation is the often the most common adaptation response . Projections indicate a potentially substantial increase in irrigation water requirements . Increasing agricultural water demand is driven by various factors, including population growth, increased irrigated agriculture, cropland expansion and higher demand for bio-energy crops for mitigation . Depending on underlying assumptions and the constraints on water resources implemented in the global agricultural models, irrigation water requirements are projected to increase two- to three-fold by the end of the century . While the combined effects of population and land use change as well as irrigation expansion account for the significant part of the projected increases in irrigation water demand by the end of the century, around 14% of the increase is directly attributed to climate change  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report