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In order to alleviate the potential congestion problem caused by the sharp increase in evacuation demand on a single shortest path, the multi-path combined evacuation planning scheme considering congestion factors was studied by using Geographic Information System (GIS), Dijkstra algorithm and Yen algorithm. Firstly, the Dijkstra algorithm and the Yen algorithm were used to calculate k shortest evacuation paths from multiple starting points to multiple endpoints. Then, the k shortest paths in each path set are combined with each other to form different evacuation path combination schemes. Finally, the traffic flow of the overlapping sections in the combined route was diverted to reduce congestion, and the optimal combination scheme of evacuation paths was identified. The simulation results show that through calculation, the number of the shortest evacuation paths between each starting and ending point and the total number of evacuation path combination schemes can be obtained. Considering the impact of overlapping sections on evacuation is more in line with the actual situation and can form the optimal combination scheme of evacuation paths.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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