River ecological runoff assessment method based on flow hydrograph

A process line and ecological technology, applied in data processing applications, instruments, complex mathematical operations, etc., can solve problems such as the inability to reflect the degree of runoff surplus and deficiency, the inconsistency of ecological runoff, and the lack of unified measurement, and achieve good reflection and strong correlation. Sex, the effect of reasonable logical relationship

Inactive Publication Date: 2021-07-23
HENAN UNIVERSITY
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Problems solved by technology

[0006] Aiming at the above defects of the prior art, the present invention provides a river ecological runoff evaluation method based on the flow process line to solve the inconsistency, non-uniform measurement and inability to reflect the runoff volume of the monthly, seasonal and annual ecological runoff in the prior art Technical Issues of Surplus and Deficit Levels

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  • River ecological runoff assessment method based on flow hydrograph
  • River ecological runoff assessment method based on flow hydrograph
  • River ecological runoff assessment method based on flow hydrograph

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Embodiment Construction

[0057] In order to show the purpose and technical solutions of the present invention more clearly, taking the Xiaolangdi Hydrological Station of the Yellow River as an example, the present invention will be further described in detail in conjunction with the accompanying drawings. The specific implementation steps are as follows figure 1 :

[0058] Step 1. Collect the yearly daily discharge data of the Yellow River Xiaolangdi Hydrological Station from the "Hydrological Yearbook of the People's Republic of China". Daily traffic data was collected from 1956-2015. Since the Xiaolangdi Reservoir was officially put into use at the end of 2001, the time series were divided into time series before the reservoir was built (1956-2001) and time series after the reservoir was built (2002-2015).

[0059] Step 2, based on the daily flow time series (1956-2001) of the 46 years before the establishment of the database, taking January 1st as an example, from the 46 data composed of the flow ra...

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Abstract

The invention discloses a river ecological runoff assessment method based on a flow hydrograph, and belongs to the field of ecological hydrology, and the IPC classification number of the river ecological runoff assessment method is E02B1 / 00. The evaluation method comprises the steps of obtaining a lower quartile flow hydrograph and an upper quartile flow hydrograph according to a hydrometric station year-by-year flow hydrograph, and defining monthly runoff calculated by the two flow hydrographs as monthly minimum ecological water demand and monthly maximum ecological water demand respectively, wherein the ratio of the runoff volume lower than the lower quartile flow hydrograph in each month to the minimum ecological water demand of the month is a monthly ecological deficit, and the ratio of the runoff volume higher than the upper quartile flow hydrograph in each month to the maximum ecological water demand of the month is a monthly ecological surplus; and the annual ecological surplus or the annual ecological deficit is the sum of all monthly ecological surplus or ecological deficit in the whole year. According to the method, the defects of an existing flow duration curve method are overcome, and the health condition of a river ecosystem can be better reflected.

Description

technical field [0001] The invention belongs to the field of ecological runoff analysis in hydrology, and in particular relates to a river ecological runoff evaluation method based on a flow process line, which belongs to a general water conservancy method, and its IPC classification number is E02B1 / 00. Background technique [0002] Ecological runoff is an important indicator for evaluating the health of river ecosystems. It includes ecological surplus and ecological deficit, which respectively reflect the surplus and deficit of river runoff compared with the normal required runoff. According to the time scale, it can be divided into annual ecological surplus and annual ecological deficit, seasonal ecological surplus and seasonal ecological deficit, monthly ecological surplus and monthly ecological deficit. The current ecological runoff assessment is based on the Flow Duration Curve (FDC), but this method has many shortcomings. [0003] First, the monthly ecological surplus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26G06F17/11
CPCG06Q10/06393G06Q50/26G06F17/11
Inventor 郭晓明郭彦苏磊曾贺马志瑾张宝森张晓华
Owner HENAN UNIVERSITY
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