In the aftermath of hostilities in southern Ukraine and the ecological catastrophe precipitated by the “Kakhovskaya HPP dam” explosion, Ukraine's food security has been considerably jeopardized. There is an urgent requirement to replenish primary canals for irrigation in the liberated territories. Substantial filtration losses from these primary canals have resulted in groundwater inundation in many regional areas. Concurrently, a predicted escalation in water resource scarcity in this area looms. Given this backdrop, drainage runoff from irrigated territories might be envisioned as an ancillary water supply for irrigation or diverse economic endeavors post-requisite purification. This research seeks to provide a theoretical foundation for the techniques and quantification of filtration losses from primary canals, contemplating the potential interception of drainage water for its ensuing judicious utilization. Employing both numerical and analytical methodologies, filtration losses were computed, exemplified through the “Ingulets irrigation system” along the central canal's trajectory, prioritizing the sagacious employment of the region's water assets. The study culminates with proposals to refurbish post-conflict infrastructure, leveraging indigenous and contemporary anti-filtration materials to structure canal beds. This entails a comprehensive scientific rationale for design and technological adaptations during renovation endeavors. Such measures are poised to significantly ameliorate the region's ecological milieu and curtail unproductive water wastage, especially given the prevailing paucity of water resources for communal consumption.