伊朗东北部Kashmar Bardaskan平原地面沉降评价

IF 1 Q4 GEOSCIENCES, MULTIDISCIPLINARY
Hamidreza Saeeidi, G. Lashkaripour, M. Ghafoori
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引用次数: 1

摘要

干旱至半干旱气候国家农业和工业的发展以及人口的增加导致了地下水资源的更多开采,并导致世界不同地区的地面沉降。伊朗东北部的Kashmar Bardaskan平原几十年来的地下水过度开采导致该平原出现大量地面沉降。该平原被认为是干旱到半干旱地带,面临着负水平衡。平原的年平均降水量约为191毫米,蒸发率为3956毫米。根据平原的单位过程线,水位每年下降1.12米。在本研究中,使用干涉SAR技术(in-SAR)和Envisat ASAR和Sentinel-1的雷达图像确定了2003年至2017年一段时间内的沉降速度。InSAR时间序列分析结果表明,卫星视线中1200平方公里的区域正在下沉,不同速度为5至26厘米/年。结果表明,除了地下水位下降外,沉积物类型(细粒层)及其厚度等地下条件也会影响地面沉降的发生和量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of land subsidence in Kashmar-Bardaskan plain, NE Iran
The development of agriculture and industry and the increase of population in countries with arid to semi-arid climates have led to more harvesting of groundwater resources and as a result land subsidence in different parts of the worlds. Decades of groundwater overexploitation in the Kashmar-Bardaskan plain in the north-east of Iran has resulted substantial land subsidence in this plain. The plain is considered as an arid to semi-arid zone and facing a negative water balance. The average annual precipitation in the plain is around 191 mm and the evaporation rate is 3956 mm. According to the unit hydrograph of the plain, the annual decline of water level is 1.12 m. In this study, the velocity of subsidence has been determined using Interferometric SAR technique (In-SAR) and radar images of Envisat ASAR and Sentinel-1 for a time period from 2003 to 2017. The results of an InSAR time series analysis indicated that an area of 1200 km2 with different speeds of 5 to 26 cm/year in the satellite line of sight (LOS) is subsiding. The results showed that in addition to the decline of groundwater level, subsurface conditions such as sediments types (fine-grained layers) and their thickness also affect the occurrence and amount of land subsidence.
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来源期刊
Iranian Journal of Earth Sciences
Iranian Journal of Earth Sciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
1.40
自引率
12.50%
发文量
0
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