Ecological operation study coupling hydrological regime and fish demand
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Abstract:
To solve the prblem of the dwindling fish resources in the lower reaches of the Fengman reservoir, we conducted the study on hydrological regime suitable for fishes on the basis of satisfying the minimum ecological water demand. We selected hydrological regime indicators that changed severely and were suitable for fishes, and used them to establish an ecological integrity function. Using the proposed function as the ecological objective, we established a multi-objective optimal scheduling model. Results showed that this model could improve ecological integrity by at least 48% . The memberships of flow rising rate and high flow pulse number increased by 0.112 and 0.261 respectively. The flow rising rate was well improved in dry years. The high flow pulse number was improved greatly in dry years and slig htly in wet years. This model can significantly improve the ecological integrity , and can provide a reference for the watershed with fish restoration tasks.
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