进水模式对植被浅沟雨水水文调控效能的影响研究

进水模式是影响植被浅沟雨水水文调控效能的主要因素之一。设计植被浅沟人工模拟试验装置,探讨不同进水模式下植被浅沟对径流量及径流峰值的影响。结果表明:在4 m~3/h恒定进水条件下,源头集中进水、沿途多点进水和沿途漫流进水3种进水模式下植被浅沟的径流总量控制率分别达到7.06%、8.33%和9.51%,径流峰值削减率分别为2.67%、5.83%和6.44%,峰现时间较传统管道排水分别延后9.6 min、10.3 min和12.2 min。以上表明采用沿途漫流进水的植被浅沟对雨水各水文参数的调控效能均优于其它进水模式。

Effect on Grassed Swales for Hydrological Regulation of Urban Stormwater Runoff by Different Influent Pattern

Inflow pattern is one of the main factors that affect the hydrological regulation performances of grassed swales for urban stormwater runoff control. The artificial simulation test device of grassed swales is manufactured to discuss the effect on runoff and peak flow under different inflow patterns. The results show that the source centralized inflow, peripheral multipoint inflow and peripheral overland inflow of grassed swales under 4-m3/h inflow load can reach 7.06%, 8.33% , 9.51% for total runoff control rate, and 2.67%, 5.83% , 6.44% for peak flow reduction rate. Meanwhile, the delay time of peak runoff is 9.6 min, 10.3 min and 12.2 min respectively compared with traditional pipeline. The above shows that the peripheral overland inflow is better than other inflow patterns of grassed swales on rainwater hydrological regulation performances.