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Realtime displayof landslidemonitoringdata

Russ Pennell, Dhammika Ruberu,CEDIR Dr Phil Flentje, Faculty of Engineering

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Context: Wollongong 80 km S of Sydney

Bulli Pass

Mount OusleyExpressway

1200 to 1800mm rainfall

Wombarra

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Context: Wollongong 80 km S of Sydney

Fall

Flow

Slide

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Context

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Context

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Context

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Context: Solution - $40 million bridge

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Monitoring stations

Continuous monitoringstations

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Data

movement2D

rainfall

porepressure

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Collection sites

University ofWollongong

site 141

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Site 141

60 m

200

m

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Site 141

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Site 141

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Site 141

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Site 141

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Data acquisition

40 mmdiameter

450 mm long

at site 141, 3 sensors 18 to 23 m below surface

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Outputs

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Task

Data files on researcher's office PC

Instruments in the field at four sites

Data transmitted periodically

via mobilephone system

Our taskRead data files as they arrive, add to existing data store.As called for, prepare graphs of the data and display on website for viewing by stakeholders

Sites ring in independently at varying times

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Data in

Simplest

103,2003,176,1300,196.27,-643.05,19.63,3125.1,22.36,14.34,13.11translated asStringID,year,dayofyear,hhhh,IPIA(Downslope),IPIB(Transverse),IPITemp,vwpFreq,vwpTemp,FieldStationTemp,BatteryVoltage

IPI = InPlace Inclinometer giving displacement - 2Dvwp = vibrating wire piezometer giving pore pressure

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Complications• Seventeen graphs• Four data sites

– allow for future sites– allow for instrument removal/damage/addition

• At three sites– three instruments measuring earth movement– two instruments measuring pore pressure– each instrument had its own set of (up to 26)

conversion constants

• two graph modes– selectable– emergency set

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Proving in realBASIC

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Solution

DAT fileon PC

Sensors in the field

convert to

Graph request received

get data

Draw graph

graph points(hourly, etc)

researchdatabaseof allreadings

convert to readings

Identify data

requiredgraph

data points

Select graph parameters

weekly, daily or 4-hourly downloads

readings hourly down to every5 minutes

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Solution

• Applications run periodically by the Windows scheduling system• The application checks for the existence of a DAT file specified

in its own configuration file• DAT file is processed if found• Can add extra sites to the system without modifying code

site141

application

configuration file for 141

DAT filesfor all sites

DATstore

141.DAT

153 newsite

153.DAT

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File manipulation

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Website

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Website: data from a station

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The website

UOW landslideresearchers

NPWS

road transport authorities

rail authorities

local council

other local andforeign researchers

Stakeholders

emergency services