Reconstruction method of ancient barrier event based on deposition-landform evidence chain

Abstract

The invention relates to the technical field of water disaster prevention, in particular to a reconstruction method of an ancient barrier event based on a deposition-landform evidence chain, and the reconstruction method comprises the following steps: obtaining data information, analyzing and sorting data, confirming barrier lake parameters, simulating reconstruction data, and comparing and analyzing to obtain a result. The invention provides a practical and effective ancient barrier event reconstruction method capable of obtaining a real and reliable result, the scale and the age of the ancient barrier event are comprehensively judged from the perspective of a deposition-landform evidence chain by means of multiple evidences, the reliability of the reconstruction result is ensured, the correct understanding of people on historical disasters is improved, the method disclosed by the invention reveals the regional long-time series major disaster catastrophe history and law, and lays a solid foundation for scientifically predicting the activity trend of future barrier disasters and accurately identifying and predicting giant barrier events.

Description

Technical field [0001] The present invention relates to the field of flood prevention prevention, and is a reconstruction method based on deposition-derived evidence chain. Background technique [0002] The campi incident is a lake formed by landslides, glaciers, ice and volcanic lava, and with the increase of the upstream water storage, the complete process of buffer is often caused seriously in the mountainous area. In the early morning of October 17, 2018, there were 5.4 × 106m3 ice-debris flow-mudslides in Gala Village, Tibet Milin County, Tibet, Tibet, Tibet, clogged Yarlu Hutu, the water storage capacity of about 1.5 × 108m3, More than 6,000 people and downstream areas, and the Lhasa-Linzhi Railway built is also threatened. However, due to the low frequency of the dam, the observation data and historical record are scarce, the formation mechanism and the risk evolution law is difficult. Only accurately recognize the disaster history of regional major cash events, can scient...

AI Technical Summary

Problems solved by technology

[0003] Since damming events mostly occur in the alpine and canyon areas with active geological surface processes, the sedimentary and geomorphic evidences are often strongly transformed in the later period, and the preservation is not complete. Huge discrepancies in reconstruction results

For example, because the collapse of the Jishixia barrier lake in the upper reaches of the Yellow River may be related to the demise of the Lajia site, this ancient barrier lake has been studied the most, and a lot of OSL and 14C dating have been carried out, but different scholars have reconstructed its formation The age ranges from more than 10,000 years to 4,000 years. Some believe that the flood peak reached 400,000 to 500,000 m3 / s, while some studies believe that the barrier lake died out through gradual siltation, and no obvious outburst flood occurred.

Because the current reconstruction method is difficult to guarantee the reliability of the reconstruction results, it hinders the correct understanding of historical disasters

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