Analysis of Multi Hazard Coupling Risk Caused by Mountain Flood and Dam Overflow in Shanping Pond
In order to study the impact degree and scope of coupling hazards caused by mountain flood and dam o-verflow on downstream residents under heavy rainfall, HEC-RAS software was used to construct a multi-disaster coupling model of mountain flood and dam overflow in Shanping pond. Firstly, taking a Shanping pond in Banan District of Chongqing as the research object, several rainfall patterns of different recurrence periods were designed according to the rainstorm intensity formula in Banan District. Secondly, with the help of digital elevation data, the original construction of Shanping pond is carried out, the parameters of dam overflow wedge are predicted by para-metric model, and the dam overflow process is simulated by the physical dam overflow mechanism. Finally, the flood risk analysis is carried out by selecting three evaluation indexes: flood depth, velocity and retention time. The results show that under the sudden heavy rainfall, the mountain flood forms rapidly and the probability of dam over-flow in Shanping pond is great. The overflow dam of Shanping pond will increase the flood risk level in the nearby area.
rainstorm floodsShanping pond dam overflowHEC-RASmulti-hazard coupling
万方数据
维普
