Multi-elasticity quantitative segmentation method for driving factors influencing runoff changes

A driving factor and quantitative segmentation technology, applied in the direction of measuring devices, instruments, surveying and navigation, etc., can solve the problems of difficult acquisition, non-negligible correlation, and few radiation data stations, so as to achieve extremely easy acquisition, eliminate correlation, The effect of reducing computational cost

Active Publication Date: 2017-08-22
HOHAI UNIV
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Problems solved by technology

However, radiation data stations are few and difficult to obtain, and the c

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  • Multi-elasticity quantitative segmentation method for driving factors influencing runoff changes
  • Multi-elasticity quantitative segmentation method for driving factors influencing runoff changes
  • Multi-elasticity quantitative segmentation method for driving factors influencing runoff changes

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Embodiment Construction

[0031] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] Such as figure 1 As shown, it is a flow chart of a method for quantitative segmentation of multi-elasticity to runoff change driving factors of the present invention, including the following steps:

[0033] (1) Basic data collection: collect long-term (generally more than 40 years) hydrometeorological data (precipitation, maximum temperature, minimum temperature, average relative humidity, average wind speed, and sunshine hours) in the watershed. flow in years).

[0034] (2) Combined with the daily maximum temperature, minimum temperature, average relative humidity, average wind speed, and sunshine hours, the Penman-Montieth formula is used to calculate the dail...

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Abstract

The invention discloses a multi-elasticity quantitative segmentation method for driving factors influencing runoff changes. The method comprises the following steps: collecting long-term hydro-meteorological data of a river basin; calculating potential evaporation amount and actual evaporation amount; then calculating parameters representing basin characteristics by using a single-parameter Budyko equation; analyzing the change extent of each hydro-meteorological variable of the basin relative to a long-time average annual value; calculating the elasticity of runoff relative to seven driving factors; determining the abrupt change point of annual runoff process, wherein a period before the abrupt change point is a reference period and a period after the abrupt change point is a changing period; and analyzing the contribution rates of the seven driving factors to the runoff changes based on the elasticity coefficients of the hydro-meteorological variables and the differences of the hydro-meteorological variables in the changing period relative to the hydro-meteorological variables in the reference period. According to the invention, a climate elasticity process is applied to multi-elasticity analysis of the influence of rainfall, highest temperature, lowest temperature, wind speed, sunlight, relative humidity and basin characteristics on runoff changes based on the changes of hydro-meteorological elements of the basin, so the influence of each driving factor on the runoff changes is quantitatively identified. The method has good applicability and is more comprehensive and more scientific in calculated results.

Description

technical field [0001] The invention relates to a method for quantitatively segmenting the driving factors of multi-elasticity changes in runoff, and belongs to the technical field of hydrology and water resources applications. Background technique [0002] Runoff is an important part of the surface hydrological cycle. As one of the earliest forms of water resources available to humans, its change process has attracted people's attention long ago. In recent years, environmental changes characterized by climate change and strong human activities have led to significant changes in river runoff in many river basins in China and around the world. Especially for our country, under the background of rapid social and economic development and the coexistence of water resource shortages and floods and droughts, the significant decline in the runoff of the Haihe River, the Yellow River and the Liaohe River in northern my country has a significant impact on the sustainable use of water...

Claims

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Application Information

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IPC IPC(8): G01C13/00
CPCG01C13/00
Inventor 王卫光邹珊邢万秋丁一民董青郑佳重
Owner HOHAI UNIV
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