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首页> 外文期刊>Big Earth Data >Identification and temporally-spatial quantification of geomorphic relevant changes by construction projects in loess landscapes: case study Lanzhou City, NW China
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Identification and temporally-spatial quantification of geomorphic relevant changes by construction projects in loess landscapes: case study Lanzhou City, NW China

机译：黄土景观建设项目对地貌相关变化的识别和时空定量化：以西北地区兰州市为例

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摘要

Sustainable development of urban areas demands, among others,a holistic approach for identification and monitoring of environ-mental changes caused by human activities. In this study, thehuman-made impact on the geo-environment is studied throughthe application of the change detection study based on PrincipalComponent Analysis on Landsat imageries and comparison of thedigital elevation models taken at different times. The analysis is setup to identify and quantify the anthropogenic geomorphologicalchanges in the loess landscape in Lanzhou city, Northwest China.Since 2002 Lanzhou has been undergoing a rapid economic devel-opment associated with construction boom. Due to limited flatbuilding ground in the narrowed Yellow River Valley and subse-quent expansion into the surrounding loess mountains, massiveearthworks are conducted for reclamation of the suitable buildingground. The results of the change detection analysis show thatapproximately 10% of the semi-natural study area correspondingto 35 km 2 has been reshaped by leveling and terracing since 1994.In particular, the geomorphology was significantly changed inthese and adjacent areas. For the single developing areaTaipingyang, a moving volume of up to 57 million m 3 was roughlyestimated.
机译：城市地区的可持续发展，除其他外，要求采用一种整体方法来识别和监测人类活动引起的环境变化。本研究通过应用基于Landsat影像主成分分析的变化检测研究并比较不同时间获取的数字高程模型，研究了人为对地球环境的影响。该分析的建立是为了识别和量化西北地区兰州市黄土景观的人为地貌变化。自2002年以来，兰州正经历与建筑业繁荣相关的快速经济发展。由于狭窄的黄河谷中的平坦建筑地面有限，随后又扩展到周围的黄土山脉，因此进行了大规模的土方工程，以回收合适的建筑地面。变化检测分析的结果表明，自1994年以来，大约35％2的半自然研究区域已通过找平和梯田整形，特别是在这些和邻近区域的地貌发生了显着变化。对于单个开发区太平洋，估计的移动量最大为5700万立方米。

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