Low cost, Long life, Localized

3L Water Level GaugeJapanese government’s leading project

- Measure river level only during flood → Communication cost reduction

- Technological development of batteries and telecom equipment→ Installation cost: Less than 1 million yen per gauge

Data Management and Transmission

Installation on sites

3L Water Level Gauge was developed through the innovative river engineering projectpromoted by MLIT* of Japan

Now being installed in about 3,000 stations of MLIT-managed rivers and 5,800 stations of medium to small rivers in Japan.

CommunicationModule

Water Level GaugeWeb Application

<Monitor Mode>(power saving)

<Measurement Mode>(In case of flooding)

Power Saving by Mode Switching

Measurementevery

10 mins

Reportingonce a day

Cloud

Non-contact type (attached to bridge)Contact type

✓ Localized: - Local river authorities are able to measure and monitor water level on their own

- Long time maintenance free (More than 5 years operation without power supply)

*Ministry of Land, Infrastructure, Transport and Tourism

Reporting every

5 – 10 mins

Measurementevery

5 - 10 mins

Cloud Cloud

Conventional river station(more facilities needed)

✓ Long life:

✓ Low cost:

ControlModule

Contact InformationFoundation of River & basin Integrated Communications (FRICS)

NISSAY Hanzoumon Bldg, 1-3 Kojimachi Chiyoda-kuTokyo 102-8474, JAPAN TEL +81-3-3299-8171, FAX +81-3-3239-2434

Infrastructure Development Institute (IDI)Plaza Edogawabashi 3F, 23-6, Skiguchi 1-chome, Bunkyo-ku,Tokyo 114-0014, JAPAN TEL +81-3-5227-4100, FAX +81-3-5227-4109E-mail 2bu01@idi.or.jp

Information Provision (compatible for both PC and Smartphone)

Places and Objectives to Install

Inundation Sensor

Critical Facilities such as Pumping Stations and Sluicegates

Existing Water Level Station

Midstream

Dam

Small and Medium Rivers

To detect water loggingTo make observation mesh finer To measure in-flow and out-flow

To support operation of pumping stations and sluicegates

Lateral profile of the current riverlevel, showing the risk stage offlooding

Current and past riverlevels, showing thetrend of river level rise

(Image) (Image)

Up and Downstream

https://www.river.go.jp/e/

BMKG

Live image from CCTV camera,showing the condition of river andflood plain

(Image)

Flood Prone AreaBack-up of existing water level stations

Slide to show the land elevation in the area

Probable Inundation Area Map layer is displayed

River Office

Local Gov.

HeadquarterTo make observation mesh finer