仁寿县植被覆盖度的空间分布特征  

Spatial Distribution Characteristics of Vegetation Coverage in Renshou County

作　　者：柴良建 刘福贵 肖琬蒙 赵安玖[2] 

机构地区：[1]四川荥经林业有限责任公司,雅安荥经625200 [2]四川农业大学林学院,成都温江611130

出　　处：《四川林勘设计》2017年第2期50-56,共7页Sichuan Forestry Exploration and Design

摘　　要：文章利用四川省仁寿县2011年的TM影像,通过提取影像的NDVI值,基于像元二分模型估算仁寿县的植被覆盖度并分析其空间分布特征,然后运用DEM数据,分析高程、坡度、坡向对植被覆盖度的影响。结果表明:(1)植被覆盖度的空间分布特征主要受高程和坡度影响,植被覆盖度分布较高的区域主要在高程小于600m、坡度为0°~25°的区域内,坡向因子的影响较小;(2)研究区植被覆盖状况总体较好,且具有明显的空间异质性。植被覆盖度空间分布较高的区域主要在山脉附近,在人口密度较大,经济较发达的中南部地区及龙泉山以西植被覆盖相对较低,仁寿县县城是整个仁寿县植被覆盖最低的地区。研究结果为仁寿县的生态环境监测体系、区域建设和开发中的环境质量综合考核提供了科学、准确、定量化的评价依据。This paper used the TM images of Renshou County in Sichuan Province in 2011 to extract the NDVI value of image pixel, estimated the vegetation cover- age of Renshou County and analyzed its spatial distribution characteristics based on dimidiate pixel model, and analyzed the effect of elevation, gradient, slope direc- tion on vegetation coverage using the DEM data. The results showed that ： （ 1 ） The spatial distribution characteristics of vegetation coverage were mainly affected by elevation and gradient and less affected by aspect. The vegetation coverage was higher in the area of less than 600m, gradient within the area of 0~ ~ 25~. （2） The vegetation coverage in the study area was generally good, and had obvious spatial heterogeneity. The spatial distribution of high vegetation coverage areas mainly in the mountains, and the lower vegetation coverage areas mainly in the west of Longquan mountains and the central and southern regions which had the large population density and the developed economic. The vegetation cover of the county town was the lowest in the whole Renshou County. The results could pro- vide a basis for the scientific, accurate and quantitative evaluation on ecological environment monitoring system, and the subsequent area construction and develop- ment of environmental quality comprehensive assessment in Renshou County.

关 键 词：植被覆盖度 NDVI 空间分布 

分 类 号：S157.1[农业科学—土壤学]