CN-121998453-A - Comprehensive investigation and causal mechanism analysis method for ecological geological conditions of stony desertification areas of medium and high mountains

CN121998453ACN 121998453 ACN121998453 ACN 121998453ACN-121998453-A

Abstract

The invention discloses a comprehensive investigation and causal mechanism analysis method for ecological geological conditions in a stony desertification area of a medium-high mountain, and belongs to the technical field of ecological environment monitoring. The method comprises the steps of fusing multisource remote sensing with historical geological, soil and climate data to construct an regional ecological geological factor data set, adopting spatial clustering and topography analysis to optimize sample layout, collecting lithology, soil, vegetation and other multidimensional ecological geological parameters on site, combining multi-temporal remote sensing with socioeconomic data, quantifying human activity intensity, building a human activity-ecological disturbance-geological response dynamic model, comprehensively decomposing quantitative contributions and interactions of power factors by using a geostatistics model, a geographic weighted regression model and a structural equation model to judge stony desertification causes, reconstructing stony desertification space-time expansion processes based on a GIS platform, inducing main control factors and forming a discrimination index and a prediction model. The method can scientifically reveal the main control mechanism of the stony desertification of the medium mountain, and provides scientific basis for ecological management and risk early warning of stony desertification areas.

Inventors

CHEN QINGSONG
LI YIYING
LI QIANQIAN
ZHANG YU
YIN LINHU
Gao Xujiao
SHI JIALIANG
ZHU JIANENG
LIU JING
WANG YIYUE
LI RUI
TU CHUNLIN
HUANG AN
SHI YU
Tao Lanchu
LIU ZHENNAN
YANG JINGUO
Cun Dexin
JIANG XIN
HE CHENGZHONG
MA YIQI

Assignees

中国地质调查局昆明自然资源综合调查中心

Dates

Publication Date: 20260508
Application Date: 20260120

Claims (7)

1. A comprehensive investigation and causal mechanism analysis method for ecological geological conditions in a stony desertification area of a medium and high mountain is characterized by comprising the following steps: Collecting multisource remote sensing data and historical geology, soil and climate data of a mountain area in a target, and establishing an area ecological geological factor data set; Adopting a spatial clustering and topography analysis method, selecting points and laying sample areas of representative ecological geological units for different lithology, slope directions and vegetation coverage; At the selected sample site position, lithology, weathering degree, soil thickness, water content and vegetation structure ecological geological parameters are obtained to form a multidimensional original data matrix; Combining multi-temporal remote sensing, ground investigation and socioeconomic data, dynamically evaluating the human activity intensity of an area, and establishing a dynamic relation model of human activity-ecological disturbance-geological response; Carrying out multi-source convergence on the natural ecological geological parameters and the human activity disturbance data, comprehensively quantifying the quantitative contribution and interaction of various dynamic factors based on a geostatistical and geographic weighted regression and structural equation modeling method, and realizing stony desertification cause judgment; And (3) inputting a dynamic factor model by utilizing a GIS platform, reconstructing a stony desertification space-time expansion process by combining historical time sequence data, identifying and summarizing a main control ecological geological cause mechanism, and outputting a discrimination index system and a predictive model in a targeted manner.
2. The method for comprehensively investigating and analyzing the cause mechanism of the ecological geological conditions of the stony desertification area of the medium and high mountain according to claim 1, wherein the method for establishing the regional ecological geological factor data set comprises the steps of carrying out space registration and rasterization fusion on the regional ecological geological factor data set and geological, soil and climate field investigation data through radiation correction, atmospheric correction, geometric correction and wave band registration; and calculating the ecological geological factors of the ground surface exposure NDVI, the soil humidity, the gradient, the lithology type and the annual average precipitation, and finishing ecological geological condition classification and stony desertification risk pre-judgment by adopting a random forest method.
3. The method for comprehensively investigating ecological geological conditions and analyzing the mechanism of origin in the stony desertification area of the medium and high mountain according to claim 1, wherein the spatial clustering and terrain analysis method is characterized in that lithology, slope direction, vegetation coverage, soil thickness and earth surface bare index factors are used as multidimensional characteristics based on ecological geological factor distribution data, the pixels of the research area are subjected to unsupervised grouping through a spatial clustering algorithm, terrain analysis and accessibility constraint screening patterns are combined, and maximum spatial dispersibility optimization is adopted.
4. The method for comprehensively investigating ecological geological conditions and analyzing the mechanism of origin in the stony desertification area of the medium and high mountain according to claim 1, wherein the multidimensional raw data matrix is characterized in that a standardized investigation sample area is arranged on site, the soil thickness is measured by combining geological drilling, and the water content of the soil is measured by adopting a Time Domain Reflectometry (TDR) or a portable soil rapid analyzer; and obtaining canopy coverage and average vegetation height through plant canopy instrument or unmanned aerial vehicle photography, collecting soil and vegetation samples for laboratory physicochemical and physiological attribute analysis, and recording central point GPS information by all sample site parameters.
5. The method for comprehensively investigating and analyzing the causal mechanism of the ecological geological conditions of the stony desertification area of the medium and high mountain according to claim 1, wherein the method is characterized in that a dynamic relation model of human activity-ecological disturbance-geological response is established, the human activity intensity and the ecological disturbance are dynamically monitored by utilizing multi-temporal remote sensing images, ground investigation and socioeconomic statistics, and the land utilization/coverage type and the remote sensing change index are quantified; And combining ground investigation information and social statistical data to model the space and time distribution of human activity intensity, and quantitatively analyzing the geological environment response of the stony desertification region through dynamic monitoring of ecological disturbance factors and a three-dimensional time sequence model of human activity-ecological disturbance-geological response.
6. The method for comprehensively investigating ecological geological conditions and analyzing the causative mechanism of the stony desertification region of the medium and high mountain according to claim 1, wherein the stony desertification causative judgment comprises the steps of carrying out space unified registration and scale standardization on natural ecological geological parameters and human activity disturbance data to form a multi-source data grid matrix, and analyzing a space structure by adopting a half variance function; and (3) quantitatively decomposing the direct, indirect and interactive effects among the natural factors, the human disturbance factors and the stony desertification response by introducing a structural equation model, and analyzing the coupling mechanism of the stony desertification power system.
7. The method for comprehensively investigating ecological geological conditions and analyzing the causative mechanism of the stony desertification region of the medium and high mountain according to claim 1, wherein the process for reconstructing the stony desertification space-time expansion comprises the steps of inputting multi-factor weight and spatial distribution parameterization by utilizing a GIS platform and inverting stony desertification distribution and ecological geological and socioeconomic time sequence data by combining remote sensing; and constructing a stony desertification lattice point cell state space, dynamically reconstructing stony desertification space-time process by adopting a space regression and simulation method, identifying a main control factor by principal component analysis and sensitivity analysis, and constructing a stony desertification discrimination index system and a predictive model.

Description

Comprehensive investigation and causal mechanism analysis method for ecological geological conditions of stony desertification areas of medium and high mountains Technical Field The invention belongs to the technical field of ecological environment monitoring, and particularly relates to a comprehensive investigation and causal mechanism analysis method for ecological geological conditions in a stony desertification area of a medium and high mountain. Background Stony desertification is a typical ecological environment problem in karst regions, and is manifested by surface vegetation destruction, soil loss and bare rock area expansion, which form serious threats to regional ecological safety and sustainable development. The traditional stony desertification monitoring and cause analysis method mainly relies on field investigation and static remote sensing interpretation, is difficult to comprehensively describe the spatial heterogeneity and dynamic evolution mechanism of the stony desertification process, and has insufficient analysis of the space-time influence on human activity interference factors. With the progress of spatial information technology such as remote sensing and Geographic Information Systems (GIS), the acquisition and processing capacities of multi-source high-resolution data are obviously improved, and a new approach is provided for dynamic monitoring, quantitative analysis of a driving mechanism and process simulation of stony desertification. Meanwhile, the comprehensive application of the methods such as geostatistical analysis, spatial regression, structural equation model and spatial simulation is helpful for revealing the coupling mechanism of natural ecological geological elements and human activity disturbance in the formation and evolution of stony desertification, and the identification precision and prediction capability of the main control factors are improved. However, the prior art still has the problems of low integration level, insufficient space scale adaptability, limited space-time analysis granularity and the like in the aspects of multi-source data integration, dynamic mechanism analysis, simulation prediction and the like, and development of a new technology system for multi-factor and multi-scale stony desertification dynamic modeling and risk discrimination is needed to support the decision making requirements of stony desertification region scientific treatment and ecological restoration. Disclosure of Invention The invention aims to solve the technical problems of insufficient multi-source data integration capability, unclear dynamic factor coupling mechanism, limited space-time dynamic reconstruction and risk discrimination precision and the like in the existing stony desertification monitoring and process simulation, realize the space-time evolution process accurate simulation and main control mechanism identification of the stony desertification area ecological geological system under multi-factor driving, and provide scientific and quantitative technical support for regional stony desertification prevention and control and ecological restoration. In order to achieve the purpose, the invention is realized by adopting the following technical scheme that the method comprises the following steps: Collecting multisource remote sensing data and historical geology, soil and climate data of a mountain area in a target, and establishing an area ecological geological factor data set; Adopting a spatial clustering and topography analysis method, selecting points and laying sample areas of representative ecological geological units for different lithology, slope directions and vegetation coverage; At the selected sample site position, lithology, weathering degree, soil thickness, water content and vegetation structure ecological geological parameters are obtained to form a multidimensional original data matrix; Combining multi-temporal remote sensing, ground investigation and socioeconomic data, dynamically evaluating the human activity intensity of an area, and establishing a dynamic relation model of human activity-ecological disturbance-geological response; Carrying out multi-source convergence on the natural ecological geological parameters and the human activity disturbance data, comprehensively quantifying the quantitative contribution and interaction of various dynamic factors based on a geostatistical and geographic weighted regression and structural equation modeling method, and realizing stony desertification cause judgment; And (3) inputting a dynamic factor model by utilizing a GIS platform, reconstructing a stony desertification space-time expansion process by combining historical time sequence data, identifying and summarizing a main control ecological geological cause mechanism, and outputting a discrimination index system and a predictive model in a targeted manner. In one scheme, the regional ecological geological factor data set is established by perfor