| 基于RS与GIS的茂县地区干旱河谷范围变化监测 |
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| 引用本文： | 周颖智,魏江龙,邵怀勇.基于RS与GIS的茂县地区干旱河谷范围变化监测[J].测绘与空间地理信息,2016(1):38-40. |
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| 作者姓名： | 周颖智 魏江龙 邵怀勇 |
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| 作者单位： | 成都理工大学地球科学学院地学空间信息技术国土资源部重点实验室,四川成都,610059 |
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| 基金项目： | 国家自然科学基金项目(41302282)；四川省科技厅项目应用基础计划项目(2014ZR0145)；中国地质调查局地质调查项目(12120115061801)；教育部高等学校博士点基金项目(20115122120007)；四川省教育厅重点基础研究基金项目(13ZA0059) |
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| 摘 要： | 以遥感(RS)和地理信息系统(GIS)为平台,选取茂县地区两期Landsat卫星影像,利用ENVI对影像数据进行监督分类,提取区域内植被覆盖图。利用Arc GIS结合茂县地区河谷分布图,界定出茂县地区两个时期内干旱河谷的分布范围。结果表明:整个茂县地区干旱河谷的范围呈缩减趋势,2005年干旱河谷面积457 619 400 m2,2015年干旱河谷面积为381 971 125 m~2,干旱河谷范围缩减了75 648 275 m~2。准确地界定出干旱河谷的范围变化,对指导川西地区生态环境综合治理以及西部广大山区的生态环境可持续发展战略的实施具有重要意义。
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| 关 键 词： | 干旱河谷 RS GIS 范围变化 |
Monitoring the Scope Changes of Dry Valleys in Maoxian Area Based on RS and GIS |
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| Abstract: | Use Remote Sensing ( RS) and Geographical Information System ( GIS) as the platform.Select two Landsat satellite images in Maoxian area as the data source.Apply ENVI to get the distribution of vegetation cover in Maoxian, from the supervised classifica-tion of satellite images.Combining with the valley distribution map of Maoxian, we can calculate the distribution range of dry river val-ley in two periods of Maoxian.The results indicate that:①The area of dry river valley in Maoxian area is reduced;②The area of the dry valley was 457 619 400 square meters in 2005, 381 971 125 square meters in 2015;③Totally ,area of the dry valley decreased by 75 648 275 square meters.Further, put forward reasonable suggestions by analyzing the causes of the dry valley to speed up ecological environment construction and promote sustainable development. |
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| Keywords: | dry valleys RS GIS scope change |
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