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首页> 外文期刊>Ocean & coastal management >Detection and analysis of shoreline changes using geospatial tools and automatic computation: Case of jijelian sandy coast (East Algeria)
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Detection and analysis of shoreline changes using geospatial tools and automatic computation: Case of jijelian sandy coast (East Algeria)

机译：使用地理空间工具和自动计算来检测和分析海岸线变化：吉吉连沙质海岸（阿尔及利亚东部）的案例

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摘要

Analysis and understanding of coastline variability and coastal erosion-accretion trends are important for scientists and local decision-makers for orienting regulation and decisions concerning coastal planning. This study focuses on the detection and analysis of historical changes in shoreline position of the Bay of Jijel (East -Algeria) occurred between 1960 and 2014. Shoreline changes along the Bay of Jijel were studied from multi-dated aerial photographs (1960, 1973 and 1988) and Quick-bird satellite image (2014). The correction of aerial photographs and satellite image was carried out using the remote sensing tools and Geographic Information System "GIS". To attain our objective, the study area was divided into three sectors for analysis: (1) the beaches of Jijel, Tassoust in the western sector, (2) the central area encompasses beaches of El Kanar, El Mzair and SidiAbdelaziz, (3) the eastern sector contains the beaches of El Djnah and Beni Belaid. Net rates changes of shoreline position in time were calculated from several statistical methods End Point Rates (EPR), Linear Regression Rates (LRR) and Weighted Linear Regression (WLR). These net rates of coastline changes have been calculated, also, on three intervals of times (1960-1973, 1973-1988 and 1988-2014) and on a period (mid-centennial) of 54 years (1960-2014). The result shows that the study area is almost stable between 1960 and 1973 with a rate of change equal to 0.072 miyear. This rate of change, has negatively increased during episodes time 1973-1988 and 1988-2014, with average values of 0.125 miyear and 0.85 miyear, respectively. Over a mid-secular period, the coast has experienced an average net rate global of changes equal to 0.459 m/year. This recession Of the coastline' is due to the combined action of the cumulative effects of stormy climate of the coast and various human actions on the Jijelian coastal strip. (C) 2016 Elsevier Ltd. All rights reserved.
机译：对于科学家和当地决策者来说，分析和理解海岸线变化和沿海侵蚀增加趋势对于制定有关沿海计划的法规和决策非常重要。本研究的重点是检测和分析1960年至2014年之间吉耶尔湾（东-阿尔及利亚）海岸线位置的历史变化。吉耶尔湾沿岸的海岸线变化是通过多幅航拍照片（1960年，1973年和1988年）和“快鸟”卫星影像（2014年）。使用遥感工具和地理信息系统“ GIS”对航空照片和卫星图像进行校正。为了达到我们的目标，将研究区域分为三个部分进行分析：（1）西部地区塔吉斯特的吉耶尔海滩，（2）中心地区包括El Kanar，El Mzair和SidiAbdelaziz的海滩，（3）东部地区有El Djnah海滩和Beni Belaid海滩。海岸线位置的净汇率随时间的变化是根据几种统计方法得出的：端点汇率（EPR），线性回归率（LRR）和加权线性回归（WLR）。这些海岸线变化的净速率也以三个时间间隔（1960-1973年，1973-1988年和1988-2014年）和54年的周期（百年中期）（1960-2014年）进行了计算。结果表明，研究区域在1960年至1973年之间几乎是稳定的，变化率等于0.072英里。这种变化率在1973-1988年和1988-2014年期间均呈负增长，平均值分别为0.125英里和0.85英里。在世俗中期，沿海地区的全球平均净变化率为0.459 m /年。海岸线的衰退是由于沿海暴风雨气候的累积影响和吉吉连沿海地带的各种人类活动共同作用的结果。 （C）2016 Elsevier Ltd.保留所有权利。

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