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Using a geographical information system (GIS) to investigate long-term spatial and temporal changes along Guyana's coastline.

机译:使用地理信息系统(GIS)调查圭亚那海岸线上的长期时空变化。

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摘要

The Demerara Coast of Guyana consists of different physio-graphical environments continuously responding to direct wave action, wave induced littoral currents, coastal water-levels and most significantly to the propogation and migration of mudbanks-mudflats. These coastal environments have been changing continuously, determined by a process of accretion and erosion linked to the presence of large along-shore west migrating mudbanks-mudflats. This study utilises a ‘Geographical Information System’ to identify, map and monitor the spatial and temporal changes in the coastline. The objective of the study is to determine erosion/accretion patterns at different segments along the coastline of Demerara in Guyana. Data used for the study were 45 and 50 + Guyana Datum (GD) contour positions, along fixed profile survey sections that numbered 86 sections, between the periods of 1941 to 1987. Nine five-year span time-periods are established to determine net positional change between contours, total accretional and erosional areas and volume estimates to examine accretional and erosional patterns. (Abstract shortened by UMI.)
机译:圭亚那的德梅拉拉海岸由不同的自然地理环境组成,不断响应直接的波浪作用,波浪引起的沿海水流,沿海水位,最重要的是对泥滩-滩涂的繁殖和迁移产生响应。这些沿海环境一直在不断变化,这是由与沿岸西移的大量泥滩-滩涂的存在有关的增生和侵蚀过程所决定的。这项研究利用“地理信息系统”来识别,绘制地图并监控海岸线的时空变化。该研究的目的是确定圭亚那Demerara海岸线沿线不同段的侵蚀/积聚模式。该研究使用的数据为1941年至1987年之间沿固定剖面调查部分(分别为86个部分)的45和50 +圭亚那基准面(GD)轮廓位置。确定了九个五年跨度时间段来确定净位置在等高线,总增生和侵蚀面积以及体积估算值之间进行更改,以检查增生和侵蚀模式。 (摘要由UMI缩短。)

著录项

  • 作者

    Karki, Rajesh.;

  • 作者单位

    University of Windsor (Canada).;

  • 授予单位 University of Windsor (Canada).;
  • 学科 Physical Geography.
  • 学位 M.A.
  • 年度 2002
  • 页码 140 p.
  • 总页数 140
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然地理学;
  • 关键词

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