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Comprehensive drought monitoring and evaluation method based on hydrological process

A hydrology and drought technology, applied in the direction of instruments, data processing applications, resources, etc., can solve the problems of inconsistent data interference, unable to objectively reflect the real state of regional drought, etc.

Pending Publication Date: 2022-01-04
INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C
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Problems solved by technology

At the same time, most of the existing studies do not consider the physical process of drought formation. Only extracting drought information from long-term observation data for analysis will be disturbed by data inconsistency, and cannot objectively reflect the true state of regional drought.

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  • Comprehensive drought monitoring and evaluation method based on hydrological process
  • Comprehensive drought monitoring and evaluation method based on hydrological process
  • Comprehensive drought monitoring and evaluation method based on hydrological process

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Embodiment Construction

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments.

[0058] A method for comprehensive drought monitoring and evaluation based on hydrological process, comprising the following steps:

[0059] S1: Distributed hydrological model construction, calibration and verification:

[0060] S11: Combined with the actual situation of the watershed in the study area, collect the DEM data, vector boundary files, land use data, soil type raster data and hydrometeorological long-sequence observation data in the study area, where the hydrometeorological long-sequence observation data includes precipitation data , temperature and humidity data and radiation data;

[0061] S12: The DEM data in S11 uses the digital elevation model to determine the watershed boundary, divide sub-watersheds, and gener...

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Abstract

The invention belongs to the field of hydrology and water resources, and particularly relates to a comprehensive drought monitoring and evaluation method based on a hydrological process. The method comprises the steps of S1, constructing, calibrating and verifying a distributed hydrological model; S2, carrying out edge distribution fitting; S3, constructing a comprehensive drought index SPERI; and S4, carrying out drought evolution analysis based on the comprehensive drought index SPERI. From the perspective of water circulation, the comprehensive drought index SPERI considering hydrological and meteorological factors is constructed by applying an SWAT model and a Copula function, and the comprehensive drought index SPERI has relatively strong physical significance and statistical basis, can sensitively capture the occurrence process of a drought event, and can truly and objectively reflect the evolution characteristics of regional drought. Meanwhile, identification and multivariable recurrence period analysis are performed on characteristic variables such as drought duration, intensity and peak value based on the index, so that powerful support can be provided for drought monitoring and evaluation.

Description

technical field [0001] The invention relates to the technical field of hydrology and water resources, in particular to a comprehensive drought monitoring and evaluation method based on hydrological processes. Background technique [0002] Drought is a phenomenon in which the supply and demand of water resources are unbalanced due to long-term water shortage. It has the characteristics of high frequency, wide range of influence and deep harm. In recent years, local and regional drought disasters have occurred year after year in my country, and the losses caused by them account for more than 50% of meteorological disasters. With global warming, extreme hydrological events such as drought occur frequently, and the abnormal water cycle process caused by human activities will also aggravate the impact of drought. Multiple driving factors make it difficult to capture the characteristics of drought duration and damage, and the research on the precise identification, measurement an...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/06393G06Q50/26
Inventor 李玮王文君吴英杰周泉成陈晓俊王怡璇全强尹航赵水霞张伟杰孙立新赵谦
Owner INST OF WATER RESOURCES FOR PASTERAL AREA MINIST OF WATER RESOURCES P R C
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