Sarychev火山活动对马图阿岛领土时空变化的影响

Q4 Earth and Planetary Sciences Geodeziya i Kartografiya Pub Date : 2023-07-20 DOI:10.22389/0016-7126-2023-996-6-42-49
A. Verkhoturov
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引用次数: 0

摘要

活跃火山活动区的特点是许多环境成分发生了重大变化,对经济发展具有潜在的危险。这项工作的目的是评估Sarychev峰火山活动导致的马图阿岛领土的空间和时间变化。作者分析了1972年至2022年的一系列陆地卫星照片。基于合成图像(NIR-SWIR-RED)对海岸线的空间动力学进行了研究。在植被转化研究中,采用了归一化相对指数(NDVI)的时间序列。对马图阿岛面积变化的时间过程、NDVI在其范围内的最大值和平均值进行了分析,并绘制了研究区域的时空转换示意图。Sarychev峰火山相对罕见和强烈的喷发导致马图阿岛发生了重大变化,这主要影响植被覆盖状态和地貌结构的调整。这是一个相对快速的演替,特别是在火山沉积物厚度几十厘米以内的地区。火山碎屑物质的堆积使该岛的空间增加了0.87平方公里,但在13年的时间里,海洋使0.52平方公里变得模糊。研究表明了活跃火山活动区内领土的危险和转变性质,在解决与经济发展、地籍评估和安排这些土地监测有关的问题时必须考虑到这一点。
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Assessing spatial and temporal transformation of Matua Island territory caused by the activity of Sarychev Peak volcano
Areas of active volcanism are characterized by significant transformation of many environmental components and are potentially dangerous at economic development. The purpose of the work is to assess spatial and temporal transformation of Matua Island territory caused by activity of Sarychev Peak volcano. The author analyzes a series of Landsat satellites photos from 1972 to 2022. The spatial dynamics of the coastline was studied based on synthesized images (NIR-SWIR-RED). In the research of vegetation transformation, a time series of normalized relative index (NDVI) was used. The time course analysis of changing Matua Island area, maximum and average values of NDVI within its limits, and a sketch map of spatial and temporal transformation of the research territory were made. Relatively rare and strong eruptions of Sarychev Peak volcano lead to significant changes of Matua Island, which mainly affects the state of the vegetation cover and restructuring of the relief. There is a relatively rapid succession, especially in the areas where thickness of volcanic deposits has not exceeded for several tens of centimeters. Accumulation of pyroclastic material caused an increase in the space of the island by 0,87 km2, but 0,52 km2 was blurred by the sea during 13 years. The research shows the nature of the danger and transformation of the territories in zones of active volcanism, which must be taken into account at solving issues related to economic development, cadastral assessment and arranging these lands monitoring.
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来源期刊
Geodeziya i Kartografiya
Geodeziya i Kartografiya Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
0.60
自引率
0.00%
发文量
73
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