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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Disastrous landslide episode of July 2005 in the Konkan plain of Maharashtra, India with special reference to tectonic control and hydrothermal anomaly
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Disastrous landslide episode of July 2005 in the Konkan plain of Maharashtra, India with special reference to tectonic control and hydrothermal anomaly

机译：2005年7月印度马哈拉施特拉邦康坎平原发生的灾难性滑坡事件，特别涉及构造控制和热液异常

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We report here the disastrous landslide episode of July 2005 that killed 190 people and gave rise to hydro-thermal anomaly. Field investigations were carried out to study the physical framework covering climatic, geologic, geomorphologic and seismologic information of the affected area. Structured interviews through an appropriately designed questionnaire were also conducted to collect first-hand information from the people who had witnessed the events and those who were involved in rescue operationto throw light on the causative factors responsible for the landslides and generation of hydrothermal anomaly. A meagre record available at the revenue and the police departments was also referred. It has been observed that all the landslides occurred within a short span of 20 h between 8 pm of 25 July and 4 pm of 26 July 2005. Majority of events took place speedily, but a few with a rumbling noise coupled with a phenomenon resembling lightening, releasing of dust and steam in the form of fountain leaving behind deep but narrow depressions that ultimately triggered the landslides. The temperature of muddy water was appreciably high in such cases. The data revealed that seismicity of the region has been responsible for developing fissures parallel to N-W to NNW-SSE trending fracture-controlled streams along which majority of landslides occurred following incessant rains. The genesis of hydrothermal anomaly developed at six places has been explained using dilatancy-diffusion model. The symptoms of slopeinstability observed before the episode at ten places indicate that sliding surfaces had already crossed geological threshold; as a result, landslides occurred without development of hydrothermal anomaly.
机译：我们在此报告2005年7月发生的灾难性滑坡事件，造成190人死亡，并引发了热液异常。进行了实地调查，以研究涵盖灾区气候，地质，地貌和地震信息的物理框架。还通过适当设计的调查表进行了结构化访谈，以收集目击者和参与救援行动的人员的第一手信息，以了解造成滑坡和热液异常产生的原因。收入和警察部门的记录也很少。据观察，所有滑坡发生在2005年7月25日晚上8点至2005年7月26日下午4点之间的短短20小时内。多数事件迅速发生，但少数事件发出隆隆声，并伴有闪电现象。 ，以喷泉的形式释放出灰尘和蒸汽，留下了深而狭窄的凹陷，最终引发了滑坡。在这种情况下，浑水的温度明显较高。数据显示，该地区的地震活动是导致裂缝形成的原因，该裂缝平行于西北至NNW-SSE趋势的裂缝控制流，在降雨不断后，大部分滑坡发生在该裂缝中。使用膨胀扩散模型解释了六个地方发生的热液异常的成因。在发生该事件之前在十个地方观察到的边坡失稳症状表明滑动表面已经超过了地质阈值。结果，没有发生热液异常而发生了滑坡。

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