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山洪灾害调查评价技术在无资料小流域洪水预警中的应用 被引量:10
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作者 程曌 《水资源开发与管理》 2021年第2期73-76,共4页
山洪灾害分析评价技术解决了中小河流水文监测系统建设项目新建水位(水文)站无资料的小流域预警方案编制问题。本文以新建的黟县水位站为例,分析了流域暴雨洪水特性、推算了设计暴雨洪水,对控制河段的水位-流量关系、中心城区防洪标准... 山洪灾害分析评价技术解决了中小河流水文监测系统建设项目新建水位(水文)站无资料的小流域预警方案编制问题。本文以新建的黟县水位站为例,分析了流域暴雨洪水特性、推算了设计暴雨洪水,对控制河段的水位-流量关系、中心城区防洪标准进行了分析,推求了预警临界雨量,为城区防洪提供预警信息。 展开更多
关键词 山洪灾害分析评价 小流域 无资料水位站 预警临界雨量
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Outlining a stepwise,multi-parameter debris flow monitoring and warning system:an example of application in Aizi Valley,China 被引量:1
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作者 CHEN Ning-sheng Javed Iqbal TANO LI +5 位作者 HU Gui-sheng WANG Feng-niang YANG Cheng-lin DING Hai-tao HE Na WANG Tao 《Journal of Mountain Science》 SCIE CSCD 2016年第9期1527-1543,共17页
In recent years, the increasing frequency of debris flow demands enhanced effectiveness and efficiency of warning systems. Effective warning systems are essential not only from an economic point of view but are also c... In recent years, the increasing frequency of debris flow demands enhanced effectiveness and efficiency of warning systems. Effective warning systems are essential not only from an economic point of view but are also considered as a frontline approach to alleviate hazards. Currently, the key issues are the imbalance between the limited lifespan of equipment, the relatively long period between the recurrences of such hazards, and the wide range of critical rainfall that trigger these disasters. This paper attempts to provide a stepwise multi-parameter debris flow warning system after taking into account the shortcomings observed in other warning systems. The whole system is divided into five stages. Differentwarning levels can be issued based on the critical rainfall thresholds. Monitoring starts when early warning is issued and it continues with debris flow near warning, triggering warning, movement warning and hazard warning stages. For early warning, historical archives of earthquake and drought are used to choose a debris flow-susceptible site for further monitoring. Secondly, weather forecasts provide an alert of possible near warning. Hazardous precipitation, model calculation and debris flow initiation tests, pore pressure sensors and water content sensors are combined to check the critical rainfall and to publically announce a triggering warning. In the final two stages, equipment such as rainfall gauges, flow stage sensors, vibration sensors, low sound sensors and infrasound meters are used to assess movement processes and issue hazardwarnings. In addition to these warnings, communitybased knowledge and information is also obtained and discussed in detail. The proposed stepwise, multiparameter debris flow monitoring and warning system has been applied in Aizi valley China which continuously monitors the debris flow activities. 展开更多
关键词 Debris Flow Monitoring system Warning system Aizi Valley Rainfall threshold
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