Drought evaluation method for coupling distributed hydrological model and combining water deficit indexes

A distributed hydrology and moisture technology, applied in the field of drought assessment, can solve problems affecting the conversion process of drought water, affecting runoff, changing the water infiltration characteristics of surface soil, etc.

Inactive Publication Date: 2014-08-27
HOHAI UNIV
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Problems solved by technology

In addition, since many areas are currently undergoing rapid land use cover changes, it will inevitably have a significant impact on the process of watershed runoff. Will definitely affect the water conversion process in drought

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  • Drought evaluation method for coupling distributed hydrological model and combining water deficit indexes
  • Drought evaluation method for coupling distributed hydrological model and combining water deficit indexes
  • Drought evaluation method for coupling distributed hydrological model and combining water deficit indexes

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[0020]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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.

[0021] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understood...

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Abstract

The invention discloses a drought evaluation method for coupling a distributed hydrological model and combining water deficit indexes. The method aims to overcome defects of a physical mechanism and the defect that time and space comparability is weak in Palmer drought indexes, and carry out standardization on the Palmer drought indexes. By means of a Capra function, a multivariate combined distribution is achieved, a multivariable combined water deficit index fusing multi-time scale information is built to serve as a comprehensive index for monitoring and evaluating regional droughts. A variable infiltration capability distributed hydrological model based on a river basin grid unit is coupled to achieve comprehensive continuous monitoring and stimulation of the droughts. The method has advantages in presenting area distribution features of the droughts and change situations along with time, meanwhile, further changes of disaster situations can be forecasted and predicted according to meteorological information and river basin social and economic data.

Description

technical field [0001] The invention relates to a drought assessment method and belongs to the technical field of drought forecasting and early warning. Background technique [0002] In recent years, droughts have occurred frequently in northern my country, and the contradiction between supply and demand of water resources has become prominent. It is urgent to adopt effective methods to simulate, monitor and predict the occurrence, evolution process and influencing factors of drought under the background of climate change. The Yellow River Basin spans three climatic zones of the southern temperate zone, the middle temperate zone and the plateau climate zone, flows through 9 provinces, and has a drainage area of ​​795,000 km 2 , the terrain is complex and the ups and downs change drastically. The seasonal variation of temperature varies greatly, and the annual average temperature is high in the southeast and relatively low in the northwest. The winter is cold and dry, the s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCY02A90/10
Inventor 杨肖丽任立良马明卫刘懿袁飞孔浩童瑞林长清山红翠龚露燕沈鸿仁
Owner HOHAI UNIV
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