Abstract
The river ecosystem has the characteristics of the coexistence of clarity and ambiguity. The starting point of eco-friendly reservoir operation is to fully consider the ecological water requirements of the lower reaches of the reservoir, so it also has the characteristics of clarity and vagueness. The fuzzy theory is an excellent tool to realize the quantification of fuzzy concepts. In this paper, the variable set theory (VS) is introduced into the decision-making field of eco-friendly reservoir scheduling scheme optimization. Taking Ertan Hydropower Station as an example, the scheduling scheme optimization is carried out. To verify the effectiveness of the evaluation method, this paper compares and analyzes the evaluation results of the fuzzy set evaluation method and the composite fuzzy matter-element method. The results show that the variable fuzzy set method has the advantages of rigorous theory, a concise model, and simple calculation, and the decision result is reasonable and reliable. This research can provide new ideas for the decision-making research of engineering.
Highlights
Eco-Friendly Reservoir OperationReservoir scheduling is an important means for implementing flood control and disaster reduction, unified water resources management, and efficient use
This paper considers the transformation of the river ecological flow process into a reservoir discharge flow constraint, that is, the discharge flow of the reservoir in a specific period or when each period is greater than the set flow, and the health of the corresponding river ecosystem can be guaranteed
It is assumed that the natural runoff series before the construction of the reservoir is the most ideal state, and the closer the runoff process after the reservoir adjustment is to the natural flow process, the more favorable the river ecosystem
Summary
Eco-Friendly Reservoir OperationReservoir scheduling is an important means for implementing flood control and disaster reduction, unified water resources management, and efficient use. Reservoirs have played enormous economic and social benefits in many aspects, such as water supply, flood control, power generation, and irrigation. Eco-friendly reservoir dispatching is a reservoir dispatching method adapting to ecological requirements. This satisfies society’s primary demand for water resources and, at the same time, takes into account the river ecosystem’s demand for water resources. It achieves a win-win result of both ecological and economic benefits through adjusting and changing the reservoir’s dispatching mode [2]. The ecological target in reservoir operation can be set by controlling the ecological flow. The commonly used methods for setting ecological flow include the Tennant method [4], the Texas method [5], and the natural flow mode method [6]
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