Method for establishing and analyzing drought index based on gravity satellite

A drought index and analysis method technology, applied in the interdisciplinary field, can solve the problems such as the drought index has not been reported, cannot well represent the overall situation of the region, and lacks the measured data of soil water content in the basin.

Inactive Publication Date: 2014-03-26
HOHAI UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) The Hydrological Drought Index (HDI) uses surface runoff, reservoirs, and river water levels to construct drought indicators. Due to the lack of measured data such as water content of watershed soil and groundwater depth, it cannot represent the overall situation of the region well.
H

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for establishing and analyzing drought index based on gravity satellite
  • Method for establishing and analyzing drought index based on gravity satellite
  • Method for establishing and analyzing drought index based on gravity satellite

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Control figure 1 , The present invention is based on GRACE gravity satellite data from January 2003 to December 2012, taking the disclosure of the continuous drought in autumn, winter and spring in Yunnan Province from 2009 to 2010 as an example to illustrate the implementation of the present invention:

[0063] Control figure 2 ,Such as figure 2 As shown in middle (a), the total land water signal retrieved from the unpreprocessed GRACE gravity satellite data is covered by band noise and high-order noise in the north-south direction. It is difficult to identify effective land water change signals. C obtained by satellite laser ranging observation 20 C of the GRACE gravity model 20 The terms are replaced; the fifth-order polynomial is used to perform polynomial fitting on the coefficients of each monthly gravity field model at least 8 times to remove the related errors of the higher-order terms; and the isotropic Gaussian smoothing filter with a smoothing radius of 200km i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for establishing and analyzing a drought index based on a gravity satellite. The method for establishing and analyzing the drought index based on the gravity satellite comprises the steps of preprocessing of observation data of the gravity satellite, extraction of the changing process of average total land water of an area, calculation of the spatial distribution of the total land water of the area, standardization processing of the total land water of the area, and calculation and analysis of the time sequence and spatial distribution of total water abnormal indexes of the drought index based on the gravity satellite. According to the method for establishing and analyzing the drought index based on the gravity satellite, the drought index established with the method can effectively reflect the seasonal and interannual changing rule of the total land water and scientifically disclose disaster causing process of a drought; a disaster-inducing mechanism of the duration of the drought is considered, the influence mechanism of the serious drought at the earlier stage on the disastrous situation at the later stage can be reflected effectively, and the problem of the scientific bottleneck of monitoring and evaluation of the drought in an area where data are insufficient or unavailable is solved.

Description

technical field [0001] The present invention relates to a method for constructing and analyzing drought index based on gravity satellite, in particular to a method for constructing a drought index that can reflect the impact of drought over time based on total land water retrieved from GRCAE gravity satellite data, belonging to gravity field observation and hydrology Study combined interdisciplinary technical fields. Background technique [0002] Drought is one of the major natural disasters that affect the sustainable development of society and economy in the world. It has the characteristics of long duration, wide range of influence, and multiple areas of influence. There is no unified standard for the definition and intensity classification of drought. Different drought indicators have their own advantages, disadvantages and applicability due to their construction purposes, hydrological input data and calculation methods. [0003] E.g: [0004] (1) The Standard Precipit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F19/00
Inventor 杨涛王超何祺胜师鹏飞王晓燕周旭东李振亚段衍衍李晓丽刘鹏
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap