Citation: | XIU Liancun, ZHENG Zhizhong, YANG Bin, YIN Liang, GAO Yang, JIANG Yuehua, HUANG Yan, ZHOU Quanping, SHI Jianlong, DONG Jinxin, CHEN Chunxia, LIANG Sen, YU Zhengkui. 2021. Application of airborne hyperspectral imaging technology to the ecological environment protection of Jiangsu, Anhui and Zhejiang Provinces at Yangtze River Economic Belt[J]. Geology in China, 48(5): 1334-1356. doi: 10.12029/gc20210502 |
Airborne hyperspectral imaging is a fast and non-destructive detection technology, which has the characteristics of high spectral resolution, narrow and multiple bands and combination of spectrum and images. Domestic miniaturized airborne hyperspectral imagers mainly rely on importing, which are expensive. Moreover, it is difficult to import high-performance hyperspectral equipment, which restricts the promotion and popularization of hyperspectral technology in China. With the support of the national major instrument development project and the national key research and development plan, Nanjing Center for China Geological Survey successfully developed the light airborne hyperspectral imaging system SSMap with the push-broom miniaturized imaging spectrometer HMS400/1000 as the core components, and established the airborne hyperspectral remote sensing comprehensive survey technology methods and operation process, as well as formed a set of reliable ground object classification methods and spectrum quantitative inversion models of water and soil pollution. Based on the introduction of the basic principle of airborne hyperspectral imaging technology and the analysis of research status at home and abroad, taking the self-developed airborne hyperspectral imaging system SSMap as an example, combined with the requirements of the ecological environment in the Yangtze River Economic Belt, the operation methods, information extraction and investigation application of aerial hyperspectral remote sensing covering an area of 4500 km2 are discussed in detail. Through the demonstration of eco-environmental geological survey in Jiangsu, Anhui, Zhejiang and other regions of the Yangtze River Economic Belt, high quality airborne remote sensing data has been obtained, and a number of important survey results have been obtained. The results show that airborne hyperspectral imaging technology has broad application prospects in ecological environment investigation, water monitoring, land use and land quality evaluation. The home-made airborne hyperspectral imager with independent intellectual property rights reduces the procurement cost, promotes the popularization of airborne hyperspectral technology, serves the national major regional development strategy, and has significant economic and social benefits.
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Spectra data of VNIR(a) and SWIR(b)
Visible-near-infrared and short-wave infrared imaging spectrometer
The composition of the manned vehicle system (a) and the composition of the UAV system (b)
Helicopter (a) transport aircraft (b) fixed-wing UAV (c) and rotor UAV (d) flying platform
The installation of the manned vehicle system (a) and the UAV system (b)
Spectrum curves of several typical ground features
The integrating sphere diagram
Visible data radiometric calibration results
Radiometric calibration results of short-wave infrared data
Comparison of locust tree reflectance and ASD data
Diagram of IMU/GPS flight path
Flow chart of hyperspectral remote sensing image classification based on PCA and SVM
Planning of the flight areas and survey lines
The relative percentage of ground feature classification results
Distribution of hyperspectral remote sensing functional areas
Fine classification of hyperspectral remote sensing features
The comprehensive grade classification of surface water by hyperspectral remote sensing
Inversion and classification of total nitrogen (N) element concentration in surface water by hyperspectral remote sensing
Inversion and classification of total phosphorus (P) element concentration in surface water by hyperspectral remote sensing
Five-day biochemical oxygen demand (BOD5) inversion classification of surface water by hyperspectral remote sensing
Results of fine classification of ground features in wet area 1#
Results of fine classification of ground features in wet area 2#
Results of fine classification of ground features in wet area 3#
Shore-based stability evaluation
Diagram of flight path
Hyperspectral inversion results of element As in the Danyang area
Hyperspectral inversion results of element Cr in the Danyang area
Hyperspectral inversion results of element Cu in the Danyang area
Interpolation analysis diagram of measured soil element As in the Danyang area
Distribution of algae information (blue)
Comparison of the airborne hyperspectral Cr element inversion image (above) and the actual collected soil samples (below)
Comparison of the airborne hyperspectral Cu element inversion image (above) and the actual collected soil samples (below)
Hyperspectral remote sensing to identify the distribution of dust pollution(red area)in some mine in Guichi