基于光纤传感技术的天然海绵体监测系统评估

对海绵设施的运行效能进行科学监测,可有效评估海绵城市建设的收益,并为海绵城市的建设提供数据反馈和指导性建议,但目前并无有效方法对天然海绵体运行效能进行监测评估。以湖北西部某大型高铁交通枢纽区海绵试点区为例,将光纤传感系统监测到的透水速率作为基础参数,探究其与含水率之间的函数关系,并建立蓄水量监测模型,完成了整个监测系统的构建。在实际降雨条件下,对该系统在径流监测及蓄水饱和预警方面的性能进行了评估,结果表明:光纤传感监测系统,在径流监测方面具有较高精度,预警产流时刻与实际产流时刻基本吻合。光纤传感监测系统展现出了很强的适应性和优异性能,可为海绵城市设施自动化运行提供技术支持。

ASSESSMENT OF NATURAL SPONGE WATER STORAGE MONITORING SYSTEM BASED ON OPTICAL FIBER SENSING TECHNOLOGY

Scientific monitoring of sponge facilities operation can not only provide effective assessment for the construction of sponge city, but also give data feedback and guidance suggestion for sponge cities construction. However, there is no effective method to monitor and evaluate the operation efficiency of natural sponges. Taking the sponge pilot area of a large-scale high-speed railway transportation hub in western Hubei as an example, a monitoring system of natural sponge was established. The water penetration rate monitored by the optical fiber was the basic parameter to explore the functional relationship between it and the water content. Then a main water storage monitoring model of the system was established. Finally, under actual rainfall condition, the monitoring performance of the system in terms of runoff and water saturation early warning was evaluated. The evaluation results showed that the optical fiber sensor monitoring system was with high accuracy in runoff monitoring, and the runoff generation warning time was consistent with the actual one. The optical fiber sensing and monitoring system showed strong adaptability and excellent performance, which provided certain technical support for the automatic operation of sponge city facilities.