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《Mountain Research》 2014-03
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Calculating Surface Area of Forest Vegetation and Distribution Characters of Damaged Forest in Baoxing of Sichuan,China

ZENG Zhen;LUO Huaibin;FAN Jianrong;LIU Fei;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Conservancy;University of Chinese Academy of Sciences;South - Central Investigation and Planning Institute of State Forestry Administration;Sichuan Remote Sensing Geomatics Institute;  
The forest in Baoxing of Sichuan,China is crucial for preserving biodiversity and ecosystem stability of the county. In order to calculate the surface area of forest and to analyze the damage of vegetation caused by the earthquake,this thesis obtained the information about pre-disaster forest vegetation types based on SPOT remote sensing images. Based on the geology significance of surface roughness,the surface area of different forest vegetation types had been calculated and the differences between the surface area and projected area had been analyzed. The information of damaged forest vegetation was acquired by aircraft images after disaster. The distribution characters of the damaged forest vegetation had been analyzed. The results show that the total surface area of forest in Baoxing County is 3 019. 48 km2. The area of conifer forest accounts for the most of the total forest vegetation area( 40. 54%),and second largest area belongs to shrubbery and broad-leaved forest Their surface area are both more than 19% of the projected area. The vertical differentiation of the forest is obvious. The altitude from low to high roughly distributed the economic forest,bamboo forest,broad-leaved forest,conifer and shrubbery. The elevation range area where is distributed lots of conifer and shrubbery has large differences between the surface area and projected area. The collapse and landslide caused by Sichuan Lushan earthquake mainly damaged the conifer forest,broad-leaved forest and shrubbery which distributed in the elevation of 1 000 ~ 2 000 m,slope of 35° to 45°. Among them,the damaged area of shrubbery is largest and that of the conifer forest is smallest. When the slope reached above 35°,the difference between two kinds of area for shrubbery and broad-leaved forest increased quickly. Area difference analyzing and damaged analyzing for forest vegetation in Baoxing County can guide the ecosystem restoration after the disaster.
【Fund】: 国家自然科学基金(41340001)“4·20芦山地震次生山地灾害应急考察和减灾对策”~~
【CateGory Index】: S717
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