the best practices for landslide monitoring and warning in

Geohazards Operation Center

Department of Mineral Resources of Thailand

The Best Practices for Landslide Monitoring and Warning

in Maephun Subdistrict, Lublae District, Uttaradit Province

Tinnakorn Tatong

Director of Geohazards Operation Center

Bureau of Environmental Geology


Ministry of Natural Resources and Environment



Lubrae, Thapla,

Muang Uttaradit, 22 May 2006

Large Landslide Events in Uttaradit Province

Nampad 9 September 2011



Large landslide in Uttaladit, Sukhothai and Phrae Province

Date: 23 May 2006

Impacts: 83 casualties, 33 missing, 673 destroyed houses and 308 million Baht of total damage



Large landslide in Nampad, Uttaladit Province Date: 9 September 2011

Impacts: 5 casualties, 2 missing, 80 destroyed houses.


Department of Mineral Resources of Thailand Geology of Uttaradit Province

Landslide area in 2006

Landslide area in 2011

Maephun Subdistrict



Rainfall Data of 2006 Event - Starting from 21 May 2006, the Uttaradit Province was covered by thick cloud and torrential rainfall due to the Intertropical Convergence Zone.

-The rainfall graph at Kung Trapoa station showed that the heavy rainfall started from the evening of 22 May 2006 to the early morning of 23 May 2006.

-The highest rainfall for 24 hrs was recorded in the morning of 23 May 2006.

-The rainfall broke 38 year record with the highest amount of 330 mm at Lublae station.



50+100 in 24 hr

Rainfall graph at Kung Trapoa station from 06.00 am of 21 May 2006 to 12.00 am of 24 May 2006

www.thaiwater.net



Present Landuse

- mountainous areas : mix orchards (Durian, Long Gong and Mafai)

- hilly areas: settlements and

- lowland areas: paddy fields



Landslide Monitoring and Warning in Uttaradit Province

- Establishing the Landslide Watch Networks in 2006

- Landslide Drill in 2010

- Landslide Risk Mapping in community level in 2011

(extending the networks to cover up/middle/down stream)

Uttaradit Province; 798 volunteers in 64 villages from 3 districts (Lublae, Thapla, Muang and Nampad)

Maephun Subdistrict; 160 volunteers in 11 villages or every village in subdistrict.



The Landslide Watch Network of Mae Phun Subdistrict



The Landslide Watch Network of Phamup Village, Maephun Subdistrict

The networks constructed the observation hut nearby Maephong river in upstream area.



Installing Simple Benchmark

Close to observatory site

Warning Level

Watch Level

Normal Level



The networks will only be at the observatory site in the heavy rain night or will be informed by GOC.



Geohazards Operation Center (GOC)

The networks coordinate with GOC of DMR



DMR Networks

Rainfall monitoring

Stream monitoring Catch signs of

landslide

Head of village Warning

Inform relevant agencies

Inform down stream villages

GOC DMR

Watch Bulletin (heavy rain)

Village speakers & Sirens

Network Flowchart

Mayor of Tambon Administration Office

or Municipality

Warning and evacuation authorization



The Results of Maephun Networks May 2007 flash flood warning from cyclone O1B

August 2010 flash flood warning from Mindulle tropical storm

August 2011 flash flood warning from Nock-ten Typhoon

2 August 2011 Nock-ten Typhoon influenced Nan and Uttaradit Province

The networks were informed by GOC

They were on the observation point and at evening of the same day water level in Maephong river raised

They used walky-talky to warn the networks and the heads of villages announce the warning through village speakers.

Villagers and properties in risk areas were moved to high ground before flash flood occurring.



From the Best Results The village established landslide warning fund for them;

the villagers have donated 2-3 Durian fruits/house to the fund. Then the Durians have be transformed to be small money for supporting the network activities and disaster management.

The village also applied the knowledge to set up a community committee on the disaster management; the committee is divided into 8 sections such as warning, evacuation, food, safety place, rescue and village guard. And

The network has become the landslide mitigation model for other areas.

The network has been invited by many authorities, NGO and UNESSCO to distribute the knowledge to other communities.



Statistic of Landslide Damages

Year Areas Casualties Damaged Cost

1988 Nakhon Si Thammarat

230 1,000 mBaht

2001 Phetchabun 136 645 mBaht

2006 Uttaradit 83 308 mBaht

2011 Krabi+Nakhon Si Thammarat,

Sop Muey, Nampad,Fang

30 (14,9,5,2)

10,000 mBaht



Thank you

Department of mineral Resources Ministry of Natural Resources and Environment

Tel. 662-6219791-6 Fax. 662-6219775


www.dmr.go.th

Tel. 662-6219701-05 Fax. 662-6219700

the best practices for landslide monitoring and warning in

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