Landslide barrier dam breach depth measuring and calculating method and landslide barrier dam burst flood peak flow measuring and calculating method
A technology of peak flow and water flow, which is applied in the measurement and calculation of the characteristic indicators of the dam failure, the measurement and calculation of the peak flow of the landslide dam failure flood, and the measurement and calculation of the depth of the landslide dam failure. It can solve the problem of heavy calculation workload and high hardware equipment requirements , did not consider the impact of dam body erosion
Active Publication Date: 2021-01-05
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Problems solved by technology
This method has a large computational workload and high requirements for hardware equipment, and it is difficult to apply it in time at disaster sites other than specific disaster monitoring experimental sites.
In addition to this technology, the existing methods for calculating the peak discharge of dam burst floods are mostly based on historical...
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Embodiment 1
[0053] In October 2018, a landslide occurred somewhere on the Jinsha River in the upper reaches of the Yangtze River. The landslide blocked the river and formed a barrier lake. The failure of the landslide dam may cause harm to the downstream coastal residents and infrastructure such as transportation. In order to formulate an effective disaster prevention and mitigation plan, it is necessary to scientifically and reasonably calculate the peak discharge of the landslide dam failure flood.
[0054] Firstly, conduct on-site surveys to obtain basic survey data. The on-site investigation includes various surveying and mapping, measurement, and simulation experiment tests on the site of the torrent and debris flow channel where the project is located, as well as the acquisition of historical disaster records, as well as the acquisition of empirical data that can be used for reference.
[0055] The basic survey data include the median particle size of the dam material d 50 = 5.2mm,...
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The invention discloses a landslide weir dam breach depth measuring and calculating method and a landslide weir dam burst flood peak flow measuring and calculating method. Aiming at the defects in theprior art, the method for judging the erodibility of the water flow of the dam body of the landslide weir dam takes the median particle size of a dam body material as an index to quickly judge the erodibility degree of the water flow of the dam body. According to the landslide dam breach depth measuring and calculating method and the landslide dam breach bottom width measuring and calculating method, the specific calculation coefficient related to the dam body erosion characteristic is introduced into the measuring and calculating method, and the influence of the water flow erodibility of thedam on breach formation and evolution can be fully considered. According to the method for measuring and calculating the burst flood peak flow of the landslide weir dam, the burst peak flow is calculated by adopting a semi-analytical formula, and the calculation result is closer to a disaster field measurement value. According to the technical scheme, the calculation principle is scientific, therequired calculation amount is small, the requirements for data acquisition and calculation hardware are low, and the requirements for disaster prevention and reduction measures for quick response inlandslide dam formation and burst events can be fully met.
Description
technical field [0001] The invention relates to a method for measuring and calculating the characteristic index of a dam burst, in particular to a method for measuring and calculating the depth of a landslide dam burst and a method for measuring and calculating the peak flow rate of a landslide dam burst flood, belonging to the technical field of geological disaster monitoring and prevention, Technical field of emergency response to geological disasters. Background technique [0002] Under the action of disasters such as collapses, landslides, and debris flows, river valleys and mountains laterally block valleys, river valleys, or riverbeds to form barrier dams, resulting in the formation of barrier lakes due to backwaters in the upstream section. Barrier lakes are widely distributed around the world. Statistics show that the time from formation to failure of barrier dams is usually short, as short as 1 day and as long as 1 week. Therefore, since the formation of the barri...
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Login to view more IPC IPC(8): G06F30/28G06Q50/26
CPCG06F30/28G06Q50/26Y02A10/40Y02A50/00
Inventor 陈华勇王涛陈宁生邓明枫江耀陈剑刚游勇
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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