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首页> 外文会议>Asian conference on remote sensingACRS >Mapping Land Subsidence of Krishna - Godavari Basin using Persistent Scatterer Interferometry Technique
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Mapping Land Subsidence of Krishna - Godavari Basin using Persistent Scatterer Interferometry Technique

机译：使用持久散射体干涉测量技术绘制克里希纳 - 戈达瓦里盆地的映射

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摘要

SAR Interferometry (InSAR) is a technique by which a wide area can be mapped for surface deformation. The conventional InSAR technique has limitations due to baseline restriction, atmospheric phase delay and temporal decorrelation. Persistent Scatterer Interferometry (PS1) technique is an advanced InSAR technique, and it mitigates the atmospheric phase delay effect and geometric decorrelation to a large extent by utilizing a stack of interferograms and gives time series deformation with high accuracy. Extraction of oil and natural gas from underground deposits leads to land subsidence. The East coast of Andhra Pradesh (AP) state in Krishna-Godavari basin is most likely to be affected by this phenomena because of extraction of oil and natural gas from its underground reservoirs for the last two decades. In this paper, an attempt is made to know how the urban cities in this region are affected due to land subsidence using PSI technique. For this, two coastal test areas are selected and ALOS-1 PALSAR datasets from 2007 to 2011 comprising of 11 and 13 scenes are processed using PSI technique. Although the area predominantly agriculture, small villages, towns and cities provide adequate Persistent Scatterers (PS). From the results, land deformation rates of different cities in test area are observed. The subsidence rate of Palakollu town is -20 mm/year and Kakinada city is around -14 mm/year. Narsapur town is showing 4mm/year upliftment because it has more prospect of groundwater recharge from river Godavari.
机译：SAR干涉测量法（INSAR）是一种技术，可以将宽面积映射到表面变形。传统的insar技术由于基线限制，大气相延迟和时间去相关性而具有限制。持久散射者干涉测量法（PS1）技术是一种先进的INSAR技术，并且通过利用一堆干涉图来减轻大气相延迟效应和几何去相关性，并以高精度地提供时间序列变形。从地下沉积物中提取油和天然气导致土地沉降。克里希纳 - 戈达瓦里盆地的东海岸（AP）国家最有可能受到这种现象的影响，因为过去二十年来从其地下水库中提取石油和天然气。在本文中，试图了解如何由于使用PSI技术的土地沉降而受到该地区的城市的影响。为此，选择了两个沿海测试区域，并使用PSI技术处理了来自2007年至2011年的2007年至2011年的Alos-1 Palsar数据集。虽然该地区主要是农业，小村庄，城镇和城市提供足够的持久散射体（PS）。从结果中，观察到测试区域不同城市的土地变形率。 Palakollu镇的沉降率为-20毫米/年，Kakinada City大约为-14毫米/年。 Narsapur镇正在展示4毫米/年升高，因为它具有更多地下水从河东河河河流充值前景。

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