Prediction method of city rainstorm flood evolvement process

Abstract

The invention discloses a method for predicting a city rainstorm flood evolution process. The method comprises the following steps: (1) initializing data; (2) establishing a void flooded formation, and then establishing a return list; (3) adding a regional block(K) of an initial break-out point to the flooded formation; (4) judging whether the flooded formation is void or not; (5) computing the water depth(D1) of the K1 at the time step(T), computing the altitude difference(D2) between the K1 and a regional block adjacent to the K1, in which if the D1 is more than the D2, the step (6) continues, if the D1 is less than or equal to the D2, the step (7) is directly carried out; (6) computing the T2 needed when the flood reaches the regional block adjacent to the K1, in which if the T is more than the T2, the step (7) continues, if the T is less than or equal to T2, the step 7 is directly carried out; (7) adding the K1 to the return list, and returning to the step (4); and (8) ending the algorithm. When the particular rainstorm flood break-out information is given, due to the adoption of the method, the flooded state of any point in geographical space of the city can be acquired, so that the rainstorm flood evolution process can be predicted.

Description

technical field [0001] The invention relates to a method for predicting the evolution process of inundation, in particular to a method for predicting the evolution process of urban storm and flood. Background technique [0002] my country is a country with frequent natural disasters, among which flood disasters are particularly serious. With the acceleration of urbanization in our country and the rapid increase of urban population, natural disasters such as urban rainstorms and floods pose a serious threat to cities with dense population, developed industries and commerce, and many buildings; on the other hand, the flood control standards in cities are low The adverse effects caused by human factors such as the urbanization flood effect, the filling and destruction of the original river system, excessive exploitation of groundwater, and the lack of flood-suitable buildings have made my country's large cities have entered a period of high incidence of rainstorm and flood disas...

AI Technical Summary

Problems solved by technology

The torrential rain that has not been encountered in 40 years has caused serious waterlogging in some areas of Hangzhou. The daily precipitation of 191.3 mm hit a historical record, causing 533 roads in the main urban area to accumulate water, with a maximum water depth of 1.5 meters. The flooded area in the main urban area reached 82.198 thousand hectares. The population exceeds 210,000, of which more than 1,500 households have water in their homes, some communities have no water and electricity, 19 schools have been flooded and classes have been suspended, and traffic has been paralyzed for a while, which has a certain impact on normal production and living order and caused serious property losses.

Similarly, the existing technology does not consider the ground roughness, so it is impossible to accurately judge when the subsequent blocks will be submerged to

When considering the issue of block connectivity, the existing technology does not judge whether the block time is blocked by mountains or other factors, and treats all blocks in the flooded situation equally, and the flooding is only based on the time

In addition, the flood discharge factor is not considered in the prior art, and there is no concept of flood discharge

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