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首页> 外文学位 >Modeling and classifying variable width riparian zones utilizing digital elevation models, flood height data, digital soil data and National Wetlands Inventory: A new approach for riparian zone delineation.
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Modeling and classifying variable width riparian zones utilizing digital elevation models, flood height data, digital soil data and National Wetlands Inventory: A new approach for riparian zone delineation.

机译：利用数字高程模型，洪水高度数据，数字土壤数据和国家湿地清单对可变宽度河岸带进行建模和分类：河岸带划分的新方法。

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摘要

Riparian zones are dynamic, transitional ecosystems between aquatic and terrestrial ecosystems with well defined vegetation and soil characteristics. Development of an all-encompassing definition for riparian ecotones, because of their high variability, is challenging. However, there are two primary factors that all riparian ecotones are dependent on: the watercourse and its associated floodplain. Previous approaches to riparian boundary delineation have utilized fixed width buffers, but this methodology has proven to be inadequate as it only takes the watercourse into consideration and ignores critical geomorphology, associated vegetation and soil characteristics. Our approach offers advantages over other previously used methods by utilizing: the geospatial modeling capabilities of ArcMap GIS; a better sampling technique along the water course that can distinguish the 50-year flood plain, which is the optimal hydrologic descriptor of riparian ecotones; the Soil Survey Database (SSURGO) and National Wetland Inventory (NWI) databases to distinguish contiguous areas beyond the 50-year plain; and land use/cover characteristics associated with the delineated riparian zones. The model utilizes spatial data readily available from Federal and State agencies and geospatial clearinghouses. An accuracy assessment was performed to assess the impact of varying the 50-year flood height, changing the DEM spatial resolution (1, 3, 5 and 10m), and positional inaccuracies with the National Hydrography Dataset (NHD) streams layer on the boundary placement of the delineated variable width riparian ecotones area. The result of this study is a robust and automated GIS based model attached to ESRI ArcMap software to delineate and classify variable-width riparian ecotones.
机译：河岸带是水生和陆地生态系统之间动态，过渡的生态系统，具有明确的植被和土壤特征。由于河岸生态交错带的高度可变性，因此要开发一个涵盖面广的定义具有挑战性。但是，所有河岸过渡带都依赖两个主要因素：河道及其相关的洪泛区。以前的河岸边界划定方法已经使用了固定宽度的缓冲区，但是这种方法已被证明是不够的，因为它仅考虑了水道，而忽略了关键的地貌，相关的植被和土壤特征。与以下其他先前使用的方法相比，我们的方法具有以下优势：ArcMap GIS的地理空间建​​模功能；沿水道的更好的采样技术可以区分50年的洪泛区，这是河岸交错带的最佳水文描述；土壤调查数据库（SSURGO）和国家湿地清单（NWI）数据库，以区分50年后平原以外的连续区域；以及与划定的河岸带相关的土地利用/覆盖特征。该模型利用了可从联邦和州机构以及地理空间交换所获得的空间数据。进行了准确性评估，以评估更改50年洪水高度，更改DEM空间分辨率（1、3、5和10m）以及国家水文数据集（NHD）流图层对边界位置的位置误差的影响划定的可变宽度河岸生态交错带面积。这项研究的结果是附加到ESRI ArcMap软件的强大，自动化的，基于GIS的模型，用于描绘和分类可变宽度的河岸生态交错带。

著录项

  • 作者

    Abood, Sinan A.;

  • 作者单位

    Michigan Technological University.;

  • 授予单位 Michigan Technological University.;
  • 学科 Geodesy.;Remote Sensing.;Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 111 p.
  • 总页数 111
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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