Space-time dynamics of deforestation in Brazilian Amazonia

被引：133

作者：

Alves, DS ^{[1
]}

机构：

[1] Inst Nacl Pesquisas Espaciais, Div Proc Imagens, BR-12227010 Sao Jose Dos Campos, Brazil

来源：

INTERNATIONAL JOURNAL OF REMOTE SENSING | 2002年 / 23卷 / 14期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1080/01431160110096791

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

Deforestation maps derived from Landsat Multi-Spectral Scanner (MSS) and Thematic Mapper (TM) imagery were used to analyse spatial patterns of deforestation in the 1970s and the 1991-1997 period in Brazilian Legal Amazonia. Nearly 90% of the deforestation has occurred within 100 km from major roads established under federal development programmes. Clearings larger than 50 ha and 200 ha accounted, respectively, for 74% and 50% of the total deforestation in the 1991-1997 period. Results show that more intense deforestation has been concentrated over some regions, leading to the continuous enlargement of forest clearings and contributing to aggravate deforestation impacts in such areas.

引用

页码：2903 / 2908

页数：6

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