...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Geography >Monitoring land cover changes in a newly reclaimed area of Egypt using multi-temporal Landsat data.
【24h】

Monitoring land cover changes in a newly reclaimed area of Egypt using multi-temporal Landsat data.

机译：使用多时态Landsat数据监控埃及新开垦区的土地覆盖变化。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Monitoring land cover changes using multi-temporal remotely-sensed data provides an effective and accurate evaluation of human impact on the environment. Agriculture is a key element of Egyptian social fabric and economy. The Egyptian government adopted policies aimed at extending cultivated lands near both fringes of the Nile delta. The Bustan 3 area, located in the desert region of the West Delta of Egypt, was targeted for reclamation in the 1990s, and occupies 341.27 km2. The main objective of this study was to monitor land cover changes in this area using multi-temporal Landsat images captured in 1984, 1990, 1999, 2004, and 2008. Temporal changes were determined using both a hybrid classification approach and normalized difference vegetation index (NDVI) in that time series. The hybrid classification results showed that this area involves four land cover classes: urban or built-up land, agricultural land, water, and barren land. From 1984 to 1990, the study area was barren land, but during the 1990s, reclamation processes produced remarkable changes in land cover. Assessment carried out on the produced thematic images indicates accuracies of 94.5%-100% were achieved. From 1999 to 2004, around 62% of the area experienced land cover change. The NDVI results indicate that the vegetated area increased after reclamation efforts were initiated. However, NDVI results were not fitted in 2008 as the accuracy assessment for the produced image during this period was only 77%. Generally, from 1984 to 2008, the Bustan 3 area of Egypt has experienced a transformation from 100% barren land to 79% agricultural land, as a result of successful land reclamation efforts.Digital Object Identifier http://dx.doi.org/10.1016/j.apgeog.2009.10.008
机译：使用多时相遥感数据监测土地覆盖变化，可以有效，准确地评估人类对环境的影响。农业是埃及社会结构和经济的关键要素。埃及政府采取了旨在扩大尼罗河三角洲两个边缘附近的耕地的政策。位于埃及西三角洲沙漠地区的Bustan 3地区在1990年代进行了垦殖，面积为341.27 km 2 。这项研究的主要目的是使用1984、1990、1999、2004和2008年拍摄的多时相Landsat影像监测该地区的土地覆盖变化。时变是使用混合分类方法和归一化差异植被指数确定的（ NDVI）。混合分类结果表明，该区域涉及四个土地覆被类别：城市或建筑用地，农业用地，水和贫瘠土地。从1984年到1990年，研究区域是贫瘠的土地，但是在1990年代，开垦过程使土地覆被发生了显着变化。对产生的主题图像进行的评估表明，达到了94.5％-100％的精度。从1999年到2004年，大约62％的地区经历了土地覆被变化。 NDVI结果表明，开垦努力开始后植被面积增加。但是，NDVI结果在2008年未得到拟合，因为在此期间生成的图像的准确性评估仅为77％。通常，从1984年到2008年，由于成功进行了土地开垦，埃及的Bustan 3地区经历了从100％的贫瘠土地转变为79％的农业土地的过程。Digital Object Identifier http://dx.doi.org/ 10.1016 / j.apgeog.2009.10.008

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号