Study on the model for mitigating urban storm water disasters

摘要

In order to rebuild old drainage pipelines and alleviate damage from storm overflow, we have developed a model for mitagaing urban storm damage. Rainfall and runoff data collected over the past 11 years in Baiwanzhuang, Beijing, China have been compiled into the database. The database was set up to record data from urban drainage systems to produce models that can predict areas of excessive water backup as well as the location of overflows. Simulated overland flows in urban areas ( A ≤ 10~5 m~2) using the instantaneous unit hydrograph method (IUHM) produced results very close to actual measured data. The benefits are that rebuilding storm sewer systems and/or the combining sewer systems can be based on drainage pipelines that have been pre-tested through computer simulations. The current model was used in the Shenyang (Provincial capital of Liaoning) drainage works with good results.