IF 1 Q3 GEOCHEMISTRY & GEOPHYSICS Geodynamics Pub Date : 2022-06-28 DOI:10.23939/jgd2022.02.005
V. Hlotov, M. Biala
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引用次数: 1

摘要

本文以乌克兰利沃夫地区Stebnyk为例,对土地利用/土地覆盖(LULC)变化进行了分析和监测,该地区是一个人为灾害影响增加的地区(其特征是由于从地下矿山开采钾盐和违反其保护规定而造成的喀斯特地陷)。开采过程中没有对地下挖掘进行回填,导致住宅区域和道路基础设施下方形成约3300万立方米的空隙,并可能成为未来山体滑坡/天坑的场所,威胁到整个地区的居民和景观生态系统。该研究基于Landsat 7号和8号卫星图像(分别于2002年2月和2019年12月拍摄)以及ETM+(增强型专题制图器)数据。采用最大似然法进行监督分类,识别并分析了四类土地上土地利用效率的时空变化。对植被指数NDVI进行了计算、分析和特征化,为进一步的监督分类提供依据。通过栅格图像滤波,提高了所得数据的精度。采用分类后比较方法分析了研究期间的LULC变化。结果表明,2002-2019年,全市建成区面积增加5.61%,森林面积和耕地面积分别减少2.77%和2.36%。水体面积变化最小(+0.37%)。对所进行分类的精度估计表明,基于RGB图像的分类比基于NDVI的分类更准确;过滤后的分类结果比未过滤的分类结果更准确。土地利用和土地利用监测促进区域、地方和国家的平衡发展以及领土规划,是乌克兰应用地球遥感数据的一个新领域。它允许评估地球成分系统的状态并预测它们的进一步变化。对人为活动的研究使预测危险的技术过程成为可能,从而避免或减少其后果。研究结果可作为进一步监测Stebnyk地区的基础。它们也将对研究地区的领土社区的和谐、可持续发展和土地管理有用。
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GEODYNAMICS
The article presents the analysis and monitoring of land-use/land cover (LULC) changes considering the case study of Stebnyk, Lviv region, Ukraine, as an area of increased anthropogenic hazard impact (characterized by the karst sinkholes creation which is the result of extracting the potassium salt from underground mines and the violation of their conservation). The extraction was carried out without backfilling the underground excavations, resulting in the void formation of about 33 million m3 lying under the residential sector and road infrastructure, and could potentially be the site of future landslides/sinkholes that threaten the inhabitants and landscape ecosystem of the region as a whole. The research is based on Landsat 7 and 8 satellite images (made in February 2002 and December 2019, respectively), and ETM+ (Enhanced Thematic Mapper) data. Supervised classification conducted by maximum likelihood method was used to identify and analyze the spatial and temporal LULC changes on the territory divided into four classes. Vegetation indices NDVI have been calculated, analyzed and featured for further supervised classification. The accuracy of the obtained data had been improved by raster image filtering. A post-classification comparison approach was used to analyze LULC changes over the research period. It was established that for the period 2002-2019 the built-up area has increased by 5.61%, and the areas of forests and fields have decreased by 2.77% and 2.36%, respectively. The area of water bodies has undergone the least changes (+0.37%). The accuracy estimation of carried out classifications showed that the classification based on RGB images is more accurate than the classification based on the NDVI; the filtered classification showed more accurate results for most classes, than the unfiltered one. LULC monitoring for balanced regional, local and national development, as well as territorial planning, is a new area of the application of the Earth remote sensing (ERS) data in Ukraine. It allows assessing the state of the geocomponents system and predicting their further changes. The study of anthropogenic activity makes it possible to predict dangerous technogenic processes and thus avoid or reduce their consequences. The results of the research can be used as a basis for further monitoring of the Stebnyk region. They will also be useful to territorial communities for harmonious, sustainable development and land management of the studied area.
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Geodynamics
Geodynamics GEOCHEMISTRY & GEOPHYSICS-
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33.30%
发文量
11
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GEODYNAMICS GEODYNAMICS GEODYNAMICS GEODYNAMICS GEODYNAMICS
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