The 4th Meeting of the Indo-French project ANR ATCHA (Accompanying The adaptation of irrigated agriculture to climate CHAnge) was held at INRA Montpellier SupAgro, campus de la Gaillarde, France, from November 4 to 7, 2019. The meeting gathered 30 participants from Montpellier, Rennes, Toulouse, Avignon and Bangalore. The meeting was followed by a field visit of OMERE CZO.