A Comprehensive Analysis Method of Spatio-temporal Distribution of Environmental Variables
A technology of environmental variables and spatio-temporal distribution, applied in instrumentation, informatics, etc., can solve the problems of lack of analysis methods and quantitative indicators, lack of spatio-temporal distribution trends, and inability to dig out effective information, so as to improve the accuracy of spatio-temporal prediction
Active Publication Date: 2021-02-09
HUAZHONG AGRI UNIV +1
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Problems solved by technology
This hinders the application and promotion of the method
[0006] (2) Lack of consideration of spatiotemporal distribution trends: At present, most of the research and applications are based on spatiotemporal discrete measurement points for spatiotemporal modeling and prediction
[0007] (3) Lack of spatio-temporal uncertainty analysis methods: In spatial geostatistics, uncertainty analysis and mapping can obtain the probability spatial distribution map of the research object exceeding or not exceeding a certain threshold, which is an important field in some fields (such as environmental pollutant threshold warning) focus of attention
However, there is still a lack of research in this area at home and abroad
[0008] (4) More spatio-temporal analysis methods and quantitative indicators are needed: the space-time cube data obtained based on spatio-temporal interpolation still lacks sufficient analysis methods and quantitative indicators, and more effective information cannot be mined
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[0060] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0061] The definition of the space-time random field is as follows: Define the space-time random field Z(p)={Z(s,t)|s∈S,t∈T}, where S∈R 2 , representing the space domain, usually S={s 1 ,s 2},s 1 ,s 2 Used to represent spatial geographic coordinates; T∈R, representing the time domain. For example, under the framework of the Kriging method, the cadmium content z(p i ), p i =(s i ,t i ), i=1,...,n, if you want to predict the soil heavy metal cadmium at the spatio-temporal position p 0 =(s 0 ,t 0 ) at the content value z(p 0 ). Here, suppose z(p i ) is a realization of the space-time random field Z(p).
[0062] Implementation of Step S1
[0063] Under the condition of stationary assumption (intrinsic assumption), the spatiotemporal empirical variogram of the spatiotemporal geographic attribute residual part R(p)=R(s,t) can be express...
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The invention discloses a comprehensive analysis method for the temporal and spatial distribution of environmental variables. Firstly, the experimental variation function values on each temporal and spatial lag are calculated, and the theoretical variation function model is fitted; Estimate the geographic attribute value of the unmeasured spatio-temporal location; establish the quantitative relationship between the environmental variable value and the regional location, form the trend body of the spatio-temporal distribution of the environmental variable value, and obtain the Kriging prediction result based on the spatio-temporal trend; propose a variety of spatio-temporal uncertainty assessments Methods; Finally, evaluate the temporal and spatial distribution of environmental variables intuitively. The present invention fully considers the characteristics of the temporal and spatial structure and continuity of environmental variables, and fully simulates and analyzes the temporal and spatial distribution characteristics of environmental variables from multiple angles of modeling, prediction, trend analysis, uncertainty analysis, and temporal and spatial analysis. Regional environmental assessment and relevant departments' spatio-temporal decision-making and auxiliary analysis provide a methodological basis.
Description
technical field [0001] The invention relates to the technical field of resource ecological environment modeling and evaluation, in particular to a comprehensive analysis method for temporal and spatial distribution of environmental variables. Background technique [0002] The ecological and environmental attributes of resources (such as soil water and salt, heavy metal content, atmospheric particulate matter concentration, etc.) generally have temporal and spatial correlations, which are manifested in the structure of spatial distribution and the continuity of changes over time. At present, with the development of monitoring means and equipment, it is possible to continuously monitor and measure the environmental attributes of regional resources, and it is possible to obtain multi-period environmental variable data. Based on these data, obtaining the spatio-temporal distribution characteristics of the researched object and mining more information contained in it is to explor...
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IPC IPC(8): G16Z99/00
Inventor 杨勇郭明武黄巍傅佩红林承达李浩
Owner HUAZHONG AGRI UNIV