基于海绵城市的生物滞留池水文效应分析

发布时间：2018-09-17 15:41

【摘要】：由城市化带来的水问题说明城市雨洪调控和建设海绵城市的重要性。运用暴雨洪水管理模型(SWMM)构建模型,模拟分析研究区天然状态、城市化后无调控措施和添加生物滞留池调控三种情景下水文指标的变化情况和相应的水文效应,并通过改变生物滞留池的表层厚度模拟径流参数的变化。结果表明,生物滞留池能有效减小径流、削减洪峰、延迟出口流量过程出现的时间,且对小降雨事件的调控性能显著;改变生物滞留池的表层厚度对下渗几乎无影响,随着表层厚度的增大表面出流和径流系数都减小,而对出口流量过程影响不大,因此可以提高生物滞留池的面积比例或其他措施共同调控城市的径流。
[Abstract]:The water problem brought by urbanization shows the importance of urban rain flood control and construction of sponge city. Using the rainstorm flood management model (SWMM) to construct the model, the changes of hydrological indexes and the corresponding hydrological effects were simulated and analyzed under the three scenarios of natural state, no control measures after urbanization and the regulation of biological detention tank. The change of runoff parameters was simulated by changing the surface thickness of the biological detention tank. The results show that biological retention tank can effectively reduce runoff, reduce Hong Feng, delay the emergence of exit flow process, and have significant control performance on small rainfall events, and change the surface thickness of biological detention tank has little effect on infiltration. With the increase of surface thickness, both surface discharge and runoff coefficient decrease, but have little effect on outlet flow process, so it can increase the area ratio of biological detention tank or other measures to control urban runoff.
【作者单位】：河海大学水文水资源学院;华北水利水电大学水利学院;
【基金】：国家自然科学基金项目(41401038) 黑龙江省应用技术研究与开发计划项目(GZ16B035,GZ16B031) 山西省科技计划项目(20165011212)
【分类号】：TU992;TV213.9

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