Avetisyan, O. 2019. THE FORECAST OF CHANGE OF GROUNDWATER LEVEL IN THE ABSENCE OF DRAINAGE SYSTEM: (on the example of the Ararat Valley). Proceedings of the YSU C: Geological and Geographical Sciences. 53, 1 (248) (Apr. 2019), 40–43. DOI:https://doi.org/10.46991/PYSU:C/2019.53.1.040.