...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Comparison of EPM and PSIAC models in GIS for erosion and sediment yield assessment in a semi-arid environment: Afzar Catchment, Fars Province, Iran
【24h】

Comparison of EPM and PSIAC models in GIS for erosion and sediment yield assessment in a semi-arid environment: Afzar Catchment, Fars Province, Iran

机译：GIS中用于在半干旱环境中评估侵蚀和沉积物产量的EPM和PSIAC模型的比较：伊朗法尔斯省Afzar集水区

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

This research was conducted in the Afzar sub-catchment area of Ghara-Aghaj River, a semi-arid region in SW Iran, using a Geographic Information System (GIS) to compare the Erosion Potential Method (EPM) and Pacific Southwest Interagency Committee (PSIAC) models in erosion-potential mapping and sediment-yield assessment. Data layers used in this study were generated from topographic maps, Landsat ETM~+ imagery, aerial photographs, field surveys and barometric and pluviometric data; factor-class evaluation was used to determine EPM and PSIAC parameters. A raster-based Geographic Information System (GIS) was applied to generate the erosion-severity and sediment-yield maps. Output data was verified by field observation and by comparison with a Global Assessment of Soil Degradation (GLASOD) map. Comparison of the EPM and PSIAC results with field observations and the GLASOD map showed that although the results of the two erosion potential maps correspond in most areas, the results of EPM model were not as reliable as the PSIAC in identifying areas with very high erosion potential. It is suggested the EPM model should be used for rapid mapping of erosion-potential in regions with limited data layers, but field verifications indicated that PSIAC results were the more reliable.
机译：这项研究是在伊朗西南半干旱地区加拉-阿加吉河（Afzar）小流域进行的，该地区使用地理信息系统（GIS）比较了侵蚀潜力法（EPM）和太平洋西南地区跨部门委员会（PSIAC） ）潜力模型和沉积物产量评估模型。本研究中使用的数据层来自地形图，Landsat ETM〜+影像，航空照片，实地调查以及气压和雨量数据。因子类评估用于确定EPM和PSIAC参数。应用基于栅格的地理信息系统（GIS）生成侵蚀度和沉积物产量图。通过实地观察并与全球土壤退化评估（GLASOD）图进行比较，对输出数据进行了验证。 EPM和PSIAC结果与野外观测结果和GLASOD图的比较表明，尽管两个侵蚀潜能图的结果在大多数地区都相对应，但EPM模型的结果在识别具有很高侵蚀潜能的区域时不如PSIAC可靠。 。建议使用EPM模型对数据层有限的区域进行腐蚀势的快速测绘，但现场验证表明，PSIAC结果更为可靠。

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