地理科学 ›› 2014, Vol. 34 ›› Issue (1): 103-109.doi: 10.13249/j.cnki.sgs.2014.01.103

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红壤区植被覆盖变化及与地貌因子关系——以赣南地区为例

李恒凯1,2(), 刘小生2, 李博1, 李发帅1   

  1. 1.中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083
    2.江西理工大学建筑与测绘工程学院, 江西 赣州 341000
  • 收稿日期:2013-03-29 修回日期:2013-05-11 出版日期:2014-01-10 发布日期:2013-08-16
  • 作者简介:

    作者简介:李恒凯(1980-),男,湖北安陆市人,博士研究生,讲师,主要研究方向为环境遥感。E-mail: giskai@126.com

  • 基金资助:
    国家自然科学基金项目(编号:41261093;41101322);江西省教育厅科技课题(编号:GJJ13405;GJJ13424)资助

Vegetation Coverage Variations and Correlation with Geomorphologic Factors in Red Soil Region: A Case in South Jiangxi Province

Heng-kai LI1,2(), Xiao-sheng LIU2, Bo LI1, Fa-shuai LI1   

  1. 1.College of Geoscience and Surveying Engineering, China University of Mining & Technology (Beijing), Beijing 100083,China
    2.Faculty of Architectural and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou,Jiangxi 341000,China)
  • Received:2013-03-29 Revised:2013-05-11 Online:2014-01-10 Published:2013-08-16

摘要:

以HJ卫星CCD影像为数据源,计算和分析赣南2008和2011年植被覆盖演变和空间分布特征及与地貌因子关系。结果表明:红壤区域植被覆盖度与高程在2008、2011年相关系数分别为0.946 1、0.954 5,具有强正相关性;植被退化主要集中在高植被覆盖区域, 100~300 m高程、1~5°坡度、306~360°坡向范围分别占总退化面积的88.84%,88.41%,30.73%;50~150 m高程、13°以下坡度和27°坡度以上区域为退化最剧烈区域。量化了植被覆盖与地貌因子的关系,为红壤区域环境治理和监测提供科学依据,具有一定的实用价值。

关键词: 红壤区, 植被覆盖, 时空变化, 地貌因子

Abstract:

HJ-CCD images being a data source, this paper calculated and analyzed the c change characteristics and spatial distribution about the vegetation in south Jiangxi regions in 2008-2011 by using the dimidiate pixel model based on NDVI, and DEM terrain elevation data were adopted to extract geomorphologic factors, and analyze the relationship between the elevation, slope, aspect and vegetation cover and vegetation degradation. The results show that it has a strong positive correlation between vegetation cover and elevation in the red soil region, the correlation coefficient is respectively 0.946 1 and 0.954 5 in 2008 and 2011.Vegetation degradation is mainly concentrated in the high vegetation coverage area, from the geomorphologic distribution of degradation area of view, it accounted for 88.84% of the total degraded area between 100 m and 300 m elevation range, 88.41% of the total degradation area between 1° and 5°slope range, the degradation area distribution from 306° to 360° slope range accounted for 30.73% of the total degradation area, it shows vegetation degradation is mainly concentrated in the region of low slope and low elevation, vegetation degradation is more serious in shady slop. From the geomorphologic distribution of vegetation degradation degree of view, the regions which the elevation range is from 50 m to 150 m, the slope is of less than 13° or more than 27° are the most violent regions of vegetation degradation, the degradation degree of shady slop is stronger than sunny slop. This study quantifies the relationship between vegetation cover and topography factors, provides a scientific basis for environmental management and monitoring in the red soil region, and has some practical value.

Key words: red soil region, vegetation coverage, spatial-temporal variations, geomorphologic factors

中图分类号: 

  • TP79