Ecological flow optimization evaluation and discrimination method based on critical water depth

The invention provides an ecological flow optimization evaluation and discrimination method based on critical water depth. The method comprises the steps of determining ecological flow control index monitoring, evaluating a control section, establishing a control section ecological flow control information set, fitting a control section natural water level flow relation curve, performing downstream jacking water level division interval sensitivity analysis based on ecological flow control indexes, and drawing up a cluster of water level flow relation curves with the downstream jacking water level as a parameter. According to the method, the critical water depth of the reservoir tail oriented to the ecological flow index is deduced, and the ecological flow optimization evaluation and judgment method based on the critical water depth is used for improving the conciseness and applicability of the ecological flow evaluation method and providing technical support for enhancing the watershed water resource supervis