Buletin Geospatial Sektor Awam - Bil 1/ 2007 - Malaysia Geoportal

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Buletin Geospatial Sektor Awam | 12Start – 0 hourAfter –10 hoursAfter 20 hoursAfter 30 hoursAfter 40 hoursAfter 60 hoursFigure 15 : Flood movement along the flood plain varies with time
Buletin Geospatial Sektor Awam |13ConclusionThe study has demonstrated that the flood mapdelineation for a big river system can be achievedin a short time with the support of GIS tools. Theprocesses of overlaying layer help to reduce theeffort of processing data for hydrological, hydraulicand ground model. The quality of the flood extentdepends to a large extent on the quality of theground model that requires a proper triangulationprocess. In the future, easy production of floodrisk map will enhance the planning of floodmanagement in the country.ReferencesAbd. Jalil bin Hassan (2002) - PenggunaanTeknologi Terkini Ke Arah Pengurusan Banjir YangBersepadu - Persidangan Pengurus Kanan JPS2002- Kijal TerengganuDepartment of Irrigation and Drainage (1982)Hydrological Procedure No. 1 – Estimation of thedesign rainstorm in Peninsular Malaysia (Revisedand updated) Ranhill Bersekutu Sdn Bhd,Infoworks RS – Wallingford Software U.K 2005KTA Tenaga Sdn. Bhd. (2003) Flood DamageAssessment of 26 April 2001 Flooding affectingThe Klang Valley and the generalized proceduresand guideline for assessment of flood damages– Draft Final reportMohamad Fadhlillah bin Haji Mahmood – (1996).An Investigation into the tidal effects on thedrainage systems in east coast of peninsularMalaysia.Mohamad Roseli bin Zainal Abidin (1999).Hydrological and Hydraulic Sensitivity Analysesfor Flood Modelling with limited data. Ph.D. thesis,University Of BirminghamPeter Hausmann and Matthias Weber (1996).Possible contributions of hydroinformatics to riskanalysis in insurance. 2nd international conferenceon hydroinformatics/Zurich/Switzerland/ 9-13September 1996.Richard Krimm (1996) Reducing flood lossesin the United States. (1996) - Proceedings ofan international workshop on floodplain riskmanagement, Hiroshima, 11-13 Nov 1996Sepakat Setia perunding Sdn. Bhd.(2002)Master plan Study on Flood Mitigation and RiverManagement for Sg. Selangor – Final report –Jabatan Pengairan dan Saliran.Are GIS dataAre GIS dataaccurate?GIS data are not accurate when comparedto what land surveyors observe andrecord in the field. Issue on quality andcoverage of the source data makes theGIS-ready information in dilemma. Ananalysis of the quality and coverage ofpossible sources is required because aparticular GIS feature is often shown onmultiple sources of varying quality. Inactual fact, the quality of source materialsshould be equal to or greater than thedesired quality of the converted database;otherwise the source can be rejectedand replaced. For example, if maps donot show the required information withappropriate accuracy, precise calculationsor aerial mapping may have to be used toprovide the data. Therefore it is crucial toidentify the accuracy of sources beforedefining them in database and beforethe cost of conversion is estimated andquoted and data conversion begun. It isalso important that GIS-ready informationshould explicitly and accurately refer tothe source documents from which theywere compiled. Such linkage could beachieved by carrying a source documentidentifier in the database record of eachGIS feature, or linking to scanned imagesof those source documents. As such, inspatial data infrastructure this shouldnot be isolated because users starvingfor data not just need data but currentand accurate data readily available tocontribute, locally, nationally and globallyto economic growth, environmental qualityand stability, and social progress.Framework Data Development andImplementation Section 1 (FWI), MaCGDI
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