The rapid increase in irrigated land in Haryana State (India) during the last two decades has destabilized regional water and salt balances. Field experiments in Hisar indicated possibilities of halting this imbalance by alternative water management interventions. Water and salt balances were analysed with the transient moisture-solute transport model SWAP. Model simulations were performed for all agro-climatic zones in Haryana. A decision-support system around the SWAP model was developed to guide water managers in making decisions on canal water allocations. The analysis indicated that the total utilizable water resources are sufficient, but that a redistribution at State level is required.
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