| 孟加拉国Bhanugach西部保育林用地类型变化(英文) |
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| 作者单位： | [1]Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh [2]Bangladesh Space Research and Remote Sensing Organization （SPARRSO）, Agargaon, Sher-e Bangla Nagar, Dhaka 1207, Bangladesh [3]Forest Policy Laboratory, Department of Forest Science, Faculty of Agriculture, Shinshu University, 399-4598 Nagano-Ken, Japan [4]Department of Geology and Mining, Rajshahi University, Rajshahi-6000, Bangladesh [5]Department of Civil and Environmental Engineering, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh |
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| 摘 要： | 应用遥感和地理信息系统调查了孟加拉国Sylhet林业分局所辖的Bhanugach西部保育林从1988年到2006年间用地类型的变化。应用了监督和非监督两种方法,用全球定位系统搜集了地面控制点。地理信息系统软件制成地图。结果表明,植被覆盖从1988年的1826hm2大幅地降低到1996年的1714.85hm2,随着协同管理措施的实施,植被覆盖自1996年后逐年增长到2006年的1847.83hm2。在没有其他类型的用地转变成裸地的情况下,裸地变化与植被覆盖间成反比。18年间水体面积从1988年的307.67hm2增加到1996年379.53hm2,96-97年间略有下降,1997年以后直到2006年基本保持不变。本文还提出了将遥感技术和地理信息系统应用于用地类型变化及地理信息系统数据库创建的一些建议。
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| 关 键 词： | 土地利用 地理信息系统 森林 孟加拉国 亚洲 |
Evaluation of land-use pattern change in West Bhanugach Reserved Forest,Bangladesh, using remote sensing and GIS techniques |
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| Authors: | Md Abdul Halim Abdus Shahid Mohammad Shaheed Hossain Chowdhury Mst Nazmun Nahar Md Shawkat Islam Sohel Md Jahangir Nuruddin Masao Koike |
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| Abstract: | A study was conducted to investigate the land-use pattern change over a period of 18 years (1988-2006) by using remote sens-ing and Geographical Information System (GIS) technologies,in the West Bhanugach Reserved Forest,a hill forest,in Sylhet Forest Divi-sion of Bangladesh. The images were processed using ERDAS Imagine software. Both supervised and unsupervised approaches were ap-plied and ground control points were collected using a GPS. Maps were prepared using GIS software. Results showed that vegetation cover drastically decreased from the year 1988 to 1996 (1 826 ha to 1 714.85 ha),but increased gradually from the year 1996 to 2006 (1 714.85 ha to 1 847.83 ha) due to the initiation of co-management practice involving local communities. Change in bare land was in-versely proportionate to the amount of vegetation cover changes unless any other land-uses were converted into bare land. The area of water bodies increased from the year 1988 to 1996 (307.67 ha to 379.53 ha),but decreased from the year 1996 to 1997,then remained in-variabile from the year 1997 to 2006. Some recommendations were also made for applying the RS and GIS techniques to study the land-use pattern change in the Bhanugach Reserved Forest and to create a GIS data base for the study area. |
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| Keywords: | land-use remote sensing Geographical Information System West Bhanugach Reserved Forest Bangladesh |
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