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A method for identifying the start date of snowmelt runoff in Northeast China

An identification method and surface runoff technology, applied in data processing applications, predictions, instruments, etc., can solve the problems of insignificant flood disasters, numerous factors affecting snowmelt, and complex action mechanisms, and achieve the effect of efficient development and utilization

Active Publication Date: 2020-11-03
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0005] To sum up, on the one hand, due to the difficulty in segmenting snowmelt runoff, there are many factors affecting snowmelt and the mechanism of action is complex, and at the same time, snowmelt runoff has strong regional characteristics; Therefore, the research on snowmelt runoff, especially on the start date of snowmelt runoff is still a blank field

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  • A method for identifying the start date of snowmelt runoff in Northeast China
  • A method for identifying the start date of snowmelt runoff in Northeast China
  • A method for identifying the start date of snowmelt runoff in Northeast China

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Embodiment Construction

[0018] Such as figure 1 As shown, the identification method of the start date of snowmelt runoff in Northeast China includes the following steps:

[0019] (1) Segmentation of snowmelt runoff in the watershed: Combining the long series of daily-scale runoff data in the watershed, using the Eckhardt digital filter method, and using the sliding minimum method to calibrate the confluence parameters, segment surface runoff, underground runoff and their proportions to the total runoff; based on Snowmelt runoff production and confluence theory, the surface runoff obtained by dividing the runoff is regarded as snowmelt runoff;

[0020] (2) Identification of the start date of snowmelt runoff in the basin: drawing the total runoff process line and the base flow ratio process line in spring (March-April) respectively, analyzing the daily-scale time-course evolution trend of the two process lines, and counting the abrupt drop point of the base flow ratio Occurrence date; the dates of sev...

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Abstract

A method for identify that start date of snowmelt runoff in northeast China is disclosed, It can reasonably estimate the start date of spring snowmelt runoff, provide a basis for the construction of reliable and suitable snowmelt runoff forecasting model, and further scientifically and reasonably formulate reservoir operation scheme, which can not only ensure the demand of agricultural water supply and shipping water, but also reserve storage capacity for the later flood control, and realize the efficient development and utilization of water resources. The method comprises the following steps:(1) dividing the snowmelt runoff of a watershed; (2) identification of the start date of snowmelt runoff in the watershed; (3) Regularity calibration of snowmelt runoff start date in the watershed.

Description

technical field [0001] The invention relates to the technical field of hydrological forecasting, in particular to a method for identifying the start date of snowmelt runoff in Northeast China. Background technique [0002] Snowmelt runoff in spring in Northeast China is the main source of runoff in spring floods, and it is also the second concentrated water inflow period besides summer floods. This period coincides with the farming and planting season, and the demand for irrigation water is relatively large; at the same time, this period is also the period for navigation water use. Under the premise of reasonable speculation on the date of snowmelt runoff in spring floods, scientifically and rationally formulate a reservoir scheduling plan, which can not only ensure the demand for agricultural water supply and navigation water use, but also reserve storage capacity for later flood control, and realize efficient development and utilization of water resources. [0003] The com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02G06Q50/06
CPCG06Q10/04G06Q50/02G06Q50/06Y02A10/40
Inventor 李文龙李鸿雁韩臣田琳王力王进王艳波郑志
Owner STATE GRID CORP OF CHINA
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