11 october 2010 y& flooding!, · 11 october 2010 version 1.0 glide no: fl-2010-000194-vnm heavy...

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SO NG NAN

SON G CO N

SONG G IA NH

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Vinh SonXom Luan

Xóm TrayKiêm Long

Co Cang

Ba DonYên Lac

Con CuoCo Lung

Tho NgoaXóm Rung HoaNinh

DongNghèn

Chà NòiXóm Làng

Cuo Lac

Võ Thuan

Dãy Trường Sơn

106°32'0"E

106°32'0"E

106°28'0"E

106°28'0"E

106°24'0"E

106°24'0"E

106°20'0"E

106°20'0"E

106°16'0"E

106°16'0"E

106°12'0"E

106°12'0"E

106°8'0"E

106°8'0"E

106°4'0"E

106°4'0"E

106°0'0"E

106°0'0"E

17°5

6'0"N

17°5

6'0"N

17°5

2'0"N

17°5

2'0"N

17°4

8'0"N

17°4

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17°3

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This map illustrates satellite-detected flood waters in Quang Binhprovince, Viet Nam, based on a preliminary analysis of crisisRadarsat-2 data acquired on 8 & 10 October 2010. Althoughthere are no significant indications of standing flood waters alongthe banks of the main Song Nan river, there are multiple areas ofpotentially severe local flooding mostly in the highlands to thesouth of Song Nan river affecting a number of locationsincluding: the villages of Yên Lac and Tân Hóa in Tuyen Hoadistrict, the village of Chà Nòi in Bo Trach district; multiple smallvillages west of the village of Co Lung in Quang Trach district;

and multiple villages along the south bank of the Song Con riverin Bo Trach district. Further, at the mouth of the Song Nan riverbetween the towns of Hoa Ninh and Ba Don, there are potentiallylarge areas of flooding, however because of the complexity ofthe mixed urban, marshland and aquaculture environment in thisarea, there is a relatively high degree of uncertainty associatedwith the flood water detection and classification. This floodassessment is a preliminary analysis & has not yet beenvalidated in the field. Please send ground feedback to UNITAR /UNOSAT.

Satellite Data (1)................. Radarsat-2 (HH)Imagery Dates ................... 8,10 October 2009Resolution ......................... 25mCopyright ............................ RADARSAT-2 © MDA 2009Credit ..................................Canadian Space AgencySatellite Data (2) ................. ENVISAT ASAR (IMP/WSM)Imagery Dates ................... 16DEC2009/03SEPT2010Resolution ......................... 25m/150mSource .............................. European Space Agency (ESA)Elevation Data .................... ASTER GDEMResolution ........................... 27 mSource ................................ METI & NASA 2009Road Data ..........................Google Map Maker 2010Other Data ......................... CISIN, ESRI, USGS, NGA, FAOFlood Analysis .................... UNITAR / UNOSATMap Production ................ UNITAR / UNOSATProjection ........................... UTM Zone 48 NorthDatum ................................ WGS-84 (EGM-96)

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TanKy Yen

Thanh Dien Chau

ThanhChuong

NghiLoc

Hung NguyenHuong

Son DucTho

Can LocThach Ha

Tx.HaTinhCam

Xuyen KyAnh

TuyenHoa Quang

TrachMinhHoa

Bo Trach DongHoi

QuangNinh

Le ThuyBen Hai

TrieuHai

DONGHOI

VINH

RailroadAirfield!I

Province BoundaryPrimary Rd.

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11 October 2010Version 1.0

Glide No: FL-2010-000194-VNM

Heavy Rainfall & Flooding

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Protected Area

SATELLITE ASSESSMENT CLASSIFICATION:Probable Flood Waters - Radarsat-2(8-10 October 2010)

Pre-Crisis Standing Waters ASAR IMP/WSM (16 Dec.2009 / 3 Sept.2010)

Map Exent

Flood Analysis with Radarsat-2 Data from 8-10 October 2010 & ASAR IMP 16 December 2009

Contact Information: unosat@unitar.org24/7 Hotline: +41 76 487 4998

www.unosat.org

The depiction and use of boundaries, geographic names and related datashown here are not warranted to be error-free nor do they imply officialendorsement or acceptance by the United Nations. UNOSAT is a programof the United Nations Institute for Training and Research (UNITAR),providing satellite imagery and related geographic information, researchand analysis to UN humanitarian & development agencies & theirimplementing partners.

Disaster coverage by theInternational Charter 'Space and

Major Disasters'. For moreinformation on the Charter, which

is about assisting the disasterrelief organizations with multi-

satellite data and information, visitwww.disasterscharter.org

Map Scale for A3: 1:200,000

Secondary Rd.

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Elevation Contour Lines in 50 meter Intervals

0 2 4 6 81Kilometers

Railroad StationProtected Site

Aquaculture ZoneSignificant local flooding affecting the villages ofYên Lac and Tân Hóa

Significant local flooding affecting multiple small villages east of Co Lung

No significant floodingdetected alongSong Nan River

Potential local flooding affecting the village ofChà Nòi

Potentially severe local flooding along the southbank of the Song Con river

Potentially significant flood waters within mixed urban / aquaculture zones