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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Observation of heavy rainfall using smart rainwater tanks
Observation of heavy rainfall using smart rainwater tanks
Author : TOSHYUKI MORIYAMA(1), SHINOBU IZUMI(2) & KATSUHIRO MORISHITA(3)
The rapid expansion of urban areas has resulted in widespread destruction of forest and paddy fields, which increases the risk of flash flooding during heavy rainfall events. However, it is difficult to construct dams or huge rainwater storage facilities in some catchment areas. In response to this, we propose the use of smart rainwater tanks (SRTs) equipped with water-level sensors, outflow monitors, and water pump controls. In our design, SRTs are connected via a network that enables monitoring data to be collected and pump-control commands to be issued to individual tanks. These connected tanks form part of a rainwater grid system (RGS). When a flood warning is issued by a self-organized map, which is based on pattern recognition, a pre-discharge command is sent to the RGS. This commands the pumps in each smart tank to automatically begin discharging stored water to free up space for impending rainfall. Data is transmitted via an Internet
cloud system that will allow residents to determine how the RGS is functioning and how much rainwater has been captured. It will also be possible to monitor rainfall amount using the RGS since it functions as a high-resolution rain gauge.
This is important since rainfall >100 mm/hr can cause serious attenuation of the reflectivity of rain cells monitored by Xband multi-parameter (MP) weather radar networks.
A prototype SRT system has been installed in a gravel-filled 100 ton underground tank in the Oginoura Garden Suburb, which is a maisonette-type housing complex, where its functions are now being tested. Initial results indicate that measuring rainfall using the gravel-filled underground tank is not suitable due to spikes in the water level after a heavy rainfall event has occurred.
File Size : 38,293,322 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 30/09/2015
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