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A Two-Dimensional Runoff Reduction Method for Separation of Human Activity Effects

A technology of human activities and runoff, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of not considering the indirect impact of runoff, inconsistent formation mechanism, etc., achieve fast calculation speed, reduce calculation cost, and calculation accuracy high effect

Active Publication Date: 2017-02-15
LANZHOU UNIVERSITY
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Problems solved by technology

However, in watersheds strongly affected by human activities, the formation mechanism of the measured runoff values ​​measured before and after the change of the underlying surface conditions is inconsistent due to the impact of human activities on the underlying surface of the watershed. Consider this indirect impact of human activities on runoff

Method used

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  • A Two-Dimensional Runoff Reduction Method for Separation of Human Activity Effects
  • A Two-Dimensional Runoff Reduction Method for Separation of Human Activity Effects
  • A Two-Dimensional Runoff Reduction Method for Separation of Human Activity Effects

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[0082] Analyze the indirect and direct impacts of human activities on runoff in the watershed according to the above method, and obtain the restored natural runoff. The present invention takes the 47-year runoff reduction (1957-2003) above the Zhangjiashan Hydrological Station of the Jinghe River as an example, analyzes the impact of human activities on the underlying surface conditions of the watershed through the new method proposed by the present invention, and obtains the impact of human activities on the runoff The amount of indirect impact of human activities on runoff, and by constructing a human activity-runoff system whose underlying surface conditions meet the consistency requirements, determine the direct impact of human activities on runoff, thereby calculating the total impact of human activities on runoff, and obtaining the restored natural track flow.

[0083] For the results, see respectively figure 2 , image 3 , Figure 4 .

[0084] figure 2 It is a ma...

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Abstract

The invention discloses a two-dimensional runoff restoration method for separating the influences of human activities. The two-dimensional runoff restoration method comprises the following steps: firstly, constructing a boundary-pansystems binary automaton model; secondly, determining input, output and internal state elements of a human activity-basin underlayer system; thirdly, calculating the influence quantity of the human activities on basin underlayer conditions; fourthly, obtaining indirect influence quantity of the human activities on the runoff; fifthly, determining input, output and internal state elements of a human activity-runoff system meeting the consistency of the underlayer conditions; sixthly, solving direct influence quantity of the human activities on the runoff on the basis of the constructed system analytic method for separating direct influences of the human activities on the runoff; seventhly, calculating natural runoff volume meeting the consistency of the basin underlayer conditions according to the calculated indirect influence quantity of the human activities on the runoff and the direct influence quantity of the human activities on the runoff. The two-dimensional runoff restoration method has the advantages of simpleness, easiness for operation, high calculation speed, high precision, and comprehensive and scientific calculation result.

Description

technical field [0001] The invention relates to the field of runoff reduction methods, in particular to a two-dimensional runoff reduction method for separation of human activities. Background technique [0002] The restoration calculation of measured runoff is the first work to be done in water resources evaluation and engineering design at home and abroad at present. The purpose of restoration is to make the calculation results of river runoff basically reflect the natural conditions and make the data series consistent so that The frequency analysis was carried out by mathematical statistics method. For a long time, the work of water volume restoration has been to "restore" the natural "background" state of water resources in the basin by deducting the impact of human activities hidden in the measured hydrological elements, that is, the unity of "measurement-reduction". static mode. However, the traditional restoration method only considers the direct impact of human act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 李勋贵魏霞
Owner LANZHOU UNIVERSITY
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