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Some Reflections of the Geographies of Socio-Economic Impact of the Kosi River Floods, 2008
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作者 Rituparna Bhattacharyya Muraree Lal Meena Suman Singh 《Journal of Earth Science and Engineering》 2013年第1期57-65,共9页
In India, floods remain a natural recurrent event of many major rivers of the sub-continent. Most frequently, it occurs during the "monsoon season" when precipitation remains very heavy and the natural watercourses ... In India, floods remain a natural recurrent event of many major rivers of the sub-continent. Most frequently, it occurs during the "monsoon season" when precipitation remains very heavy and the natural watercourses fail to accommodate excess water. The river Kosi, located in Bihar, India too bears a long history of annual floods and is often labeled as a "Sorrow of Bihar" due to its strange behavioural attributes and the extensive damage it causes as a result of severe flood inundation. The river Kosi is one of the megafans of the Gangetic plains. Geologic evidence demonstrates that the megafans are prone to devastating flood hazards. On August 18, 2008, the river Kosi burst through its banks to flow into a channel it had abandoned more than 200 years ago, drowning towns, numerous villages and rendering over a million homeless and many were reported to have died. The research is an attempt to reflect on the geographies of socio-economic impact of the Kosi flood, 2008. For this, the research uses a holistic approach. The findings suggest that the rescue and rehabilitation operation continue in the post flood region. However, operations were significantly delayed as the result of inept bureaucratic process and insufficient funding. The final sections draw together, the threads of analysis and suggest suitable measures, so that the floods of such magnitude can be managed better in near future. 展开更多
关键词 FLOOD river kosi geographies of socio-economic impact holistic approach management.
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围岩应力理论力学在马鹿塘水电站二期工程的应用
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作者 何树明 周华冰 《云南水力发电》 2014年第6期18-21,76,共5页
地下洞室围岩稳定与否,关键取决于洞室开挖后的应力重分布问题。如果开挖后存在致命性的应力重分布,则对工程的影响将是灾难性的,即使可以处理,但对以后工程运行也存在严重的隐患。因此,对岩体地应力的研究、评价洞室围岩的稳定性,对决... 地下洞室围岩稳定与否,关键取决于洞室开挖后的应力重分布问题。如果开挖后存在致命性的应力重分布,则对工程的影响将是灾难性的,即使可以处理,但对以后工程运行也存在严重的隐患。因此,对岩体地应力的研究、评价洞室围岩的稳定性,对决定工程方案是否成立以及确定相应的开挖和支护处理措施具有指导意义。 展开更多
关键词 马鹿塘水电站 地应力 应力重分布 科西课题 弹性应变 抗压强度 水力致裂法
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科西河跨境流域水旱灾害与防治 被引量:9
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作者 胡桂胜 陈宁生 +1 位作者 Narendra Khanal 韩大为 《地球科学进展》 CAS CSCD 北大核心 2012年第8期908-915,共8页
科西河流域是恒河的一个重要支流,地跨中国、尼泊尔和印度3个国家,流域面积7.15万km2,流域具有世界上最大的高差(从海拔8 848 m的珠穆朗玛峰到海拔60 m的恒河平原),最为完整的气候、土壤和植被带谱。流域发育有罕见的多类型水旱灾害,主... 科西河流域是恒河的一个重要支流,地跨中国、尼泊尔和印度3个国家,流域面积7.15万km2,流域具有世界上最大的高差(从海拔8 848 m的珠穆朗玛峰到海拔60 m的恒河平原),最为完整的气候、土壤和植被带谱。流域发育有罕见的多类型水旱灾害,主要有冰湖溃决、洪水、干旱、水土流失等。通过实地调查这一代表性跨界流域的水文、气象、地质、地貌、土壤植被和区域社会经济等基本特征并结合已有的研究资料,揭示流域冰湖溃决、洪水、干旱等水旱灾害的特征和时空发育规律。流域冰湖溃决灾害集中于科西河流域上级支流,灾害损失巨大,并由于溃决洪水的侵蚀,沿途链状滑坡泥石流灾害发育;洪水灾害主要集中于流域下游,在相对较高标准的防洪体系中,洪水灾害是自然因素和人为因素相结合产生的,并造成流域水土流失严重;干旱灾害范围大,年内持续时间长,并且由于人口增加和生态退化进一步严重化。最后,依据流域水旱灾害特点,提出一系列减灾策略与措施。 展开更多
关键词 科西河 跨界流域 冰湖溃决 洪水 干旱
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