Monitoring of the water and salt balance of the Bakbakty rice irrigation system under reuse of collector-drainage water for irrigation
DOI:
https://doi.org/10.51301/ejsu.2025.i3.06Keywords:
water and salt balance, irrigated lands, drainage systems, collector-drainage water, salinity, water qualityAbstract
This study presents the methodology, approach, and results of calculating the components of water and salt balances based on three years of field research on the reuse of collector-drainage water in the Tasmurun area of the Bakbakty irrigation system, under arid and low-water conditions typical for water-demanding rice fields. Balance calculations were based on data from in situ observations with active involvement of local farmers, ensuring data reliability. The water balance showed a slight negative discrepancy ranging from 0.4-0.6% in 2022 and 0.001-0.02% in 2023-2024, confirmed by groundwater level monitoring and maps. The salt balance showed a slight accumulation, with values from +0.016 to +0.29 t/ha in field No. 2 and +0.049 to +0.089 t/ha in field No. 4. Seasonal salt increases were linked to leaching regimes and the dominance of easily soluble salts, posing no threat to land reclamation status.
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