Faculty of Natural Resources, Urmia University, Urmia, Iran.
IAE, Faculty of Education, Science, Technology and Mathematics, University of Canberra, Canberra, Australia.
Sci Rep. 2017 May 8;7(1):1523. doi: 10.1038/s41598-017-01796-z.
Early studies on sand dune movement and desertification in Iran have not always been convincingly demonstrated because of problems with the field-based measurements. In some areas where various land uses have been engulfed by aeolian sand dunes, desertification is clear, but in other less settled areas, it may not be so obvious. The objective of this study is to demonstrate encroachments of the Rigboland sand sea, central Iran, in its different directions and variable magnitude rates. Determining the rate and direction of the sand sea movements is critical for specifying which lands should be prioritized and quickly protected. The study has trialed a change detection technique which uses a Cross-Tabulation module to compare two available Landsat images over the Rigboland sand sea. This indicates that within a ten-year span (from 1988 to 1998) more than 200 ha/yr were added to the Rigboland sand sea, from the alluvial fan landforms in the eastern upstream, outer margins of the Rigboland sand sea. Coupled with GIS techniques, this type of analysis of the remote sensing (RS) images provides an effective tool for the monitoring and prognostication of sand dune movement and sand sea change.
早期有关伊朗沙丘移动和荒漠化的研究，由于实地测量存在问题，因此并不总是具有说服力。在一些不同土地用途被风沙掩埋的地区，荒漠化现象明显，但在其他不太稳定的地区，情况可能并不那么明显。本研究的目的是展示伊朗中部里格博兰沙漠的不同方向和不同幅度的扩张情况。确定沙丘运动的速度和方向对于确定哪些土地应该优先保护至关重要。本研究尝试了一种变化检测技术，该技术使用交叉制表模块比较了里格博兰沙漠的两幅可用 Landsat 图像。这表明，在十年的时间跨度内（1988 年至 1998 年），从里格博兰沙漠东部上游的冲积扇地貌，向里格博兰沙漠的外围边缘，每年增加了超过 200 公顷的沙丘。与 GIS 技术相结合，这种对遥感（RS）图像的分析为监测和预测沙丘移动和沙漠变化提供了有效的工具。
