Dr. Bokun Yan Profile

Dr. Bokun Yan

at AGRS

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Publications (6)

Proceedings Article | 12 March 2021 Paper

Multi-period dynamic evaluation of soil loss in loess area

Yanni Ma, Yichuan Li, Xian Zhang, Junchuan Yu, Rongyuan Liu, Bokun Yan, Fuping Gan, Xinfeng Dong, Na Li, Yi Guo, Juan Bai

Proceedings Volume 11763, 117637S (2021) https://doi.org/10.1117/12.2587481

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The loess area is located in the middle and upper reaches of the Yellow River Basin. This area has a large area of ecologically sensitive areas and fragile areas, and it is the region with the most serious soil erosion in the country. A lot of loess is attached to the surface of the loess area, the vegetation is relatively sparse, and the seasonal rainfall is obvious. Therefore, the amount of soil erosion is large, which has a significant impact on the soil fertility of the loess area. At the same time, a large amount of soil erosion poses a huge challenge to environmental protection in the middle and lower reaches. Therefore, the problem of soil erosion is a key phenomenon that needs attention in the loess area. This paper takes the loess area of Tongwei-Zhuanglang area in Gansu Province as the research object, uses the multi-year remote sensing image classification data as the background (2000, 2005, 2010, 2015), combined with meteorological data (this data is released according to CRU The global 0.5° climate data set and the high-resolution climate data set for China released by CNERN were generated by the Delta spatial downscaling scheme in the Loess Plateau area), soil data, and soil parameter data (source 1 from the second soil census: 1 million Chinese soil maps), topographic data (DEM), vegetation coverage data, and the use of an improved universal soil loss equation (RULSE) model to carry out soil erosion in the region for many years (2000, 2005, 2010, 2015) Strength information extraction and classification. Contrast and analyze the degree of soil erosion in the area for many years, and evaluate the local soil erosion prevention measures. Studies have shown that from 2000, 2010, and 2015, the degree of soil loss gradually decreased, and the total amount of soil loss gradually decreased. However, due to the abnormally reduced precipitation in 2005, the soil erosion was generally low, which was an abnormal situation. Overall, soil erosion has continued to decrease in recent years, and the effects of soil and water conservation have been remarkable.

Proceedings Article | 12 March 2021 Paper

Comparison of GaoFen-5 hyperspectral and airborne hyperspectral imagery: case study of Gossan identification in Subei area

Junchuan Yu, Yichuan Li, Bokun Yan, Rongyuan Liu, Yanni Ma, Fuping Gan, Liang Zhang

Proceedings Volume 11763, 117635J (2021) https://doi.org/10.1117/12.2587248

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Proceedings Article | 12 March 2019 Paper

Progress and prospectives on engineering application of hyperspectral remote sensing for geology and mineral resources

Xinfeng Dong, Bokun Yan, Fuping Gan, Na Li

Proceedings Volume 11023, 110232Y (2019) https://doi.org/10.1117/12.2521828

KEYWORDS: Minerals, Remote sensing, Geology, Bidirectional reflectance transmission function, Atmospheric corrections, Iron, Data processing, Hematite

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Proceedings Article | 24 November 2008 Paper

Atmospheric correction of hyperspectral data using MODTRAN model

Yuanliu Xu, Runsheng Wang, Shengwei Liu, Suming Yang, Bokun Yan

Proceedings Volume 7123, 712306 (2008) https://doi.org/10.1117/12.815552

KEYWORDS: Atmospheric corrections, Reflectivity, Data modeling, Atmospheric modeling, Sensors, Atmospheric sensing, Absorption, Data corrections, Atmospheric optics, Aerosols

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Proceedings Article | 24 November 2008 Paper

Experiment study on quantitative retrieval of mineral abundances from reflectance spectra

Bokun Yan, Shengwei Liu, Runsheng Wang, Xiaofang Guo, Weidong Sun

Proceedings Volume 7123, 712303 (2008) https://doi.org/10.1117/12.815549

KEYWORDS: Minerals, Reflectivity, Scattering, Deconvolution, Calcite, Radiative transfer, Remote sensing, Particles, Light scattering, Quartz

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Proceedings Article | 15 August 2007 Paper

Estimating hydrocarbon content using hyperspectral remote sensing at Qaidam Basin, China

Pan Hu, Qingjiu Tian, Zhong Guan, Bokun Yan

Proceedings Volume 6752, 675224 (2007) https://doi.org/10.1117/12.760770

KEYWORDS: Reflectivity, Absorption, Statistical analysis, Error analysis, Soil science, Statistical modeling, Remote sensing, Hyperspectral imaging, Data modeling, Methane

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Showing 5 of 6 publications

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