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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Topographic changes of a supply-limited inland parabolic sand dune during the incipient phase of stabilization
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Topographic changes of a supply-limited inland parabolic sand dune during the incipient phase of stabilization

机译：稳定初期，有限供应的内陆抛物线沙丘的地形变化

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摘要

Topographic surveys on an inland parabolic sand dune over a six-year period provide insight into the effects of diminishing local sand supply on dune stabilization. During the interval (2003-2009) sparse vegetation cover (Psoralea lanceolata) increased despite drier than normal moisture conditions and steady wind power during the growing season. Whereas these climatic conditions are typically ascribed to sustaining or increasing dune activity, here they coincide with stabilization. Through the use of geographic information system (GIS) analysis of volumetric changes it is shown that the increase of P. lanceolata can be attributed to the reduction of local sand supply from two blowouts along the arms of the parabolic dune during the six-year period. These results show that climate is not the only control on dune activity in vegetated inland dunefields.
机译：对内陆抛物线沙丘进行了为期六年的地形调查，可洞悉当地沙土供应减少对沙丘稳定的影响。在此期间（2003年至2009年），尽管生长季节的水分条件比正常干燥和风力稳定，但稀疏的植被覆盖（Psoralea lanceolata）却有所增加。尽管这些气候条件通常归因于沙丘活动的持续或增加，但在这里它们与稳定相吻合。通过使用地理信息系统（GIS）对体积变化进行分析，结果表明轮叶假单胞菌的增加可归因于在六年期间沿抛物线沙丘的臂部两次井喷造成的局部砂供应减少。 。这些结果表明，气候并不是内陆植被沙丘地带沙丘活动的唯一控制。

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