Ecological flow determination method considering lifting amount

Abstract

The invention provides an ecological flow determination method considering a lifting amount, and belongs to the field of environmental engineering. The method comprises the steps: collecting related data needed by the calculation of ecological flow; determining an ecological base flow; selecting an upper limit Qmax and a lower limit Qmin of the ecological base flow, and preliminarily determining an interval [Qmin, Qmax] of the ecological base flow; verifying the lower limit Qmin of the ecological base flow Q; calculating landscape wetland water demand B1, sediment transport water demand B2 anddilution self-purification water demand B3 of the three service objects; comparing the water demands of the three service objects, and determining a lifting amount S; finding out a minimum value anda maximum value to determine a lifting amount lower limit Smin and a lifting amount upper limit Smax of the interval; and combining the ecological base flow Q and the lifting amount S to comprehensively determine the ecological flow. According to the method, complex problems are simplified, and the ecological base flow is used as an evaluation target and is more direct and effective; in addition,the interval management of the ecological flow can reflect the natural attribute and the functional attribute of the ecological flow, and emphasizes the service attribute of people serving the ecology.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a method for determining ecological flow considering lifting amount. Background technique [0002] There is no ecological flow problem in rivers and lakes, because aquatic animals and plants grow naturally according to the habitats of rivers and lakes. However, for a long time, due to the increasing demand for water in and out of rivers and lakes, the water volume of rivers and lakes that natural ecosystems rely on has been continuously occupied, and the base flow is not enough, thus the so-called ecological flow problem has emerged. [0003] The two concepts related to ecological flow are ecological base flow and ecological water demand. Ecological base flow is the minimum flow required to maintain the basic shape and basic ecological functions of the river. The functional scope is the natural ecosystem, and the emphasis is on the continuous flow of the river...

AI Technical Summary

Problems solved by technology

[0005]At present, there are many controversies about the determination of ecological flow, and there are situations where the concept is not clear, and the relationship with ecological base flow and ecological water demand has not been clarified; , it is difficult to quantify the ecological water demand under different temporal and spatial distributions; the ecological flow is closely related to the ecological water demand, and the corresponding algorithms are too many and too chaotic. The required data cannot be obtained, and the parameters are difficult to determine. Most calculation methods obtain a value or a group of values ​​after considering many service objects, which cannot adapt to changes in time and space, water demand changes, and incoming water changes, and are difficult to use as the basis for assessment. Inconvenience to management

[0006]Due to the diversity of ecological service objects under different time and space distributions, it is difficult to quantify the ecological water demand, and the relevant departments are currently assessing according to the measured flow of the section. Guarantee the continuous flow of the river, but the discharge assessment standard of the determined section is too high, and the assessment is meaningless

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