Bi Huaxing
Beijing Forestry University
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Publication
Featured researches published by Bi Huaxing.
Frontiers of Forestry in China | 2006
Bi Huaxing; Li Xiaoyin; Guo Mengxia; Liu Xin; Li Jun
The digital elevation model (DEM), an important source of information, is usually used to express a topographic surface in three dimensions and to imitate essential natural geography. DEM has been applied to physical geography, hydrology, ecology, and biology. This study analyzed digital elevation data sources and their structure, the arithmetic of terrain attribute extraction from DEM and its applications, and DEM’s error and uncertainty algorithm. The Hayachinesan mountain area (in northeastern Japan) was chosen as research site, and the focus was on terrain analysis and the impacts of DEM resolution on topographic attributes, analyzed using TNTmips GIS software (MicroImage, Inc., USA) and “Digital Map 25,000” (published by the Geographical Survey Institute of Japan in 1998). The results show that: (1) DEM is a very effective tool for terrain analysis: many terrain attributes (such as slope, aspect, slope type, watershed, and standard flow path) can be derived, and these attributes can be displayed with both image and attribute databases, with the help of GIS; (2) DEM resolution has a great influence on terrain attributes. The following details are shown: (a) DEM resolution has a significant effect on slope estimation: the average slope becomes smaller and the standard deviation becomes larger when DEM resolution changes from fine to coarse, and the different impacts of DEM resolution on different slope ranges can be classified into three gradient classes: 0–10° (underestimated slope), 10–35° (overestimated slope), and >35° (little impact on slope estimation); (b) DEM resolution has little effect on aspect estimation, but flat areas become larger when DEM resolution changes from fine to coarse; and (c) the quantity of hydrologic topography information declines as DEM resolution decreases.
International Journal of Agriculture and Biology | 2013
Xu Huasen; Bi Huaxing; Gao Lubo; Yun Lei; Chang Yifang; Xi WeiMin; Liao Wenchao; Bao Biao
Archive | 2013
Bi Huaxing; Gao Lubo; Xu Huasen; Bao Biao; Bi Chao; Cirenquxi; Pan Di
Procedia environmental sciences | 2011
Yun Lei; Gao Lubo; Bi Huaxing; Zhu Qingke; Wang Xiaoyan
Pakistan Journal of Agricultural Sciences | 2014
Xu Huasen; Bi Huaxing; Weimin Xi; R. L. Powell; Gao Lubo; Yun Lei
Journal of Northeast Forestry University | 2009
Yun Lei; Bi Huaxing; Ren Yi; Ma WenJing; Tian XiaoLing
Archive | 2017
Bi Huaxing; Xu Huasen; Cai Zhicai; Wang Dan; Chang Yifang; Duan Hangqi; Sun Yubu; Wang Xiaoxian; Wei Xiaoyan; Xiao Congying; Yang Xiaoqi
Ganhan Diqu Nongye Yanjiu | 2016
Wang Dan; Bi Huaxing; Xu Huasen; Chang Yifang; Cai Zhicai
Archive | 2014
Bi Huaxing; Zhu Yongjie; Huo Yunmei; Xu Huasen; Gao Lubo; Wang Xiaoxian; Wang Xiaoyan; Chang Yifang; Cirenquxi; Liao Wenchao
Procedia environmental sciences | 2011
Gao Lubo; Yun Lei; Ren Yi; Cui Zhewei; Bi Huaxing