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首页> 外文期刊>Journal of arid environments >Sinkholes induced by uncontrolled groundwater withdrawal for agriculture in arid Saudi Arabia. Integration of remote-sensing and geophysical (ERT) techniques
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Sinkholes induced by uncontrolled groundwater withdrawal for agriculture in arid Saudi Arabia. Integration of remote-sensing and geophysical (ERT) techniques

机译：干旱的沙特阿拉伯因不受控制的地下水抽取而导致的污水池。遥感与地球物理（ERT）技术的集成

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摘要

Recently, an increasing number of sinkholes related to cavernous karst bedrock has been documented in the Kingdom of Saudi Arabia (KSA). One of the most hazardous areas is Al Jouf region, with an average annual rainfall below 35 mm. Here, crop fields irrigated with groundwater have experienced a very rapid expansion. Limited hydrogeological data indicate that the over-exploitation of the aquifers with very low recharge have caused a decline of around 50 m in the groundwater level. Landsat images acquired in 2002, 2015, and 2018 were utilized to automatically map and assess the expansion of agricultural activities in the area, as a proxy for groundwater withdrawal. The data indicate a rising expansion rate, from 57 km(2)/yr in the period 2002-2015, to 123 km(2)/yr during the 2015-2018 interval. The recent sinkhole spate is attributed to the growth of irrigated crops and the associated groundwater level decline, as supports the temporal and spatial correlation. It is proposed that the water level drawdown entails an increase in the effective weight of the roof of relict cavities formed in the past. This interpretation is substantiated at a specific sinkhole investigated by ERT. The geophysical investigation provides information of the position of the underlying cavity and indicates that its roof has been affected by buoyancy loss related to the anthropogenic water level decline.
机译：最近，沙特阿拉伯王国（KSA）记录了与海绵状岩溶基岩有关的更多的下陷。最危险的地区之一是Al Jouf地区，年平均降雨量低于35毫米。在这里，用地下水灌溉的农田迅速发展。有限的水文地质数据表明，补给量非常低的含水层的过度开采已导致地下水位下降了约50 m。利用2002年，2015年和2018年获取的Landsat图像自动绘制地图并评估该地区农业活动的扩展，以作为地下水抽取的代理。数据表明，增长率从2002-2015年的57 km（2）/年上升到2015-2018年的123 km（2）/年。最近的下沉坑涌浪归因于灌溉作物的生长和相关的地下水位下降，为时空相关提供了支持。提出了水位下降使得过去形成的文物空腔的屋顶的有效重量增加。这种解释在ERT研究的特定污水坑中得到证实。地球物理调查提供了下腔的位置信息，并表明其顶板已受到​​与人为水位下降有关的浮力损失的影响。

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  • 来源
    《Journal of arid environments》 |2020年第6期|104132.1-104132.12|共12页
  • 作者

  • 作者单位

    Saudi Geol Survey Appl Geol Sect Geohazard Dept POB 54141 Jeddah 21514 Saudi Arabia|Sohag Univ Fac Sci Geol Dept Sohag Egypt;

    Saudi Geol Survey Appl Geol Sect Geohazard Dept POB 54141 Jeddah 21514 Saudi Arabia;

    Univ Zaragoza Earth Sci Dept E-50009 Zaragoza Spain;

    Saudi Geol Survey Geophys Survey Dept POB 54141 Jeddah 21514 Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Geophysics; Human-induced sinkhole; Agriculture; Aquifer over-exploitation; KSA;

    机译：地球物理学;人为造成的污水坑;农业;含水层过度开发;卡萨;
  • 入库时间 2022-08-18 05:18:00

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