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Data modelling for GIS based saturation excess overland flow

In a Geographic Information System (GIS), the transformation of geographical data (e.g. actual locations and physical characteristics of objects on the Earth surface) into geographic information dealt with complex series of process and procedures. In hydrologic modelling, streamflow is one of the ma...

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Main Authors: Mohamad Yusoff, Izham, Abdul Rahman, Alias, Katimon, Ayob, Ismail, Wan Ruslan
Format: Conference or Workshop Item
Language:English
Published: 2008
Subjects:
T Technology (General)
Online Access:http://eprints.utm.my/id/eprint/7776/1/DATA_MODELLING_FOR_GIS_BASED_SATURATION_EXCESS_OVERLAND_FLOW.pdf
http://eprints.utm.my/id/eprint/7776/
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spelling my.utm.77762017-09-10T05:02:12Z http://eprints.utm.my/id/eprint/7776/ Data modelling for GIS based saturation excess overland flow Mohamad Yusoff, Izham Abdul Rahman, Alias Katimon, Ayob Ismail, Wan Ruslan T Technology (General) In a Geographic Information System (GIS), the transformation of geographical data (e.g. actual locations and physical characteristics of objects on the Earth surface) into geographic information dealt with complex series of process and procedures. In hydrologic modelling, streamflow is one of the main physical geographic apprearance within nature of hydrologic cycle. Rapid population growth,constructions, urbanization, and industrialization have increased impervious area causing hazardous impact towards rate of stormwater infiltrated into soil. Thus the overland flow in a post-development area becomes greater than the pre-development area. Within GIS, all stream networks, surface structures and its properties must be assigned and preserved with coordinate systems and map projections respectively known as georeferencing. Hence, any GIS based hydrologic applications need careful understanding in terms of map projections, coordinate systems and its transformations, scales and grid resolutions while entering spatial data. At present, there is still no unifying evidence available that provides a coherent and satisfactory explaination for the integration of the core GIS based saturation excess mechanisms into the streamflow generating process. Concepts of georeferencing need to be applied while performing GIS based saturation mechanism and to sustain the existing spatial properties of soil and land use. This study aims to visualize the effects of georeferencing system towards determine areas and total overland flow volume generated from Saturation Excess Overland Flow (SEOF) process using topographic wetness index (TWI) and antecedent soil-moisture conditions (AMC). Both factors are analysed by focusing on spatial object preservation techniques of conformal based Rectified Skew Orthomophic (RSO) and equidistance based Cassini-Soldner projections. This study is carried out at Sungai Pinang basin, located in North East coast of Penang Island, Malaysia. The areas and discharge from SEOF areas are determined and compared based on the map scale of 1 : 25 000. Digital layers of Sungai Pinang basin are constructed using Autodesk Map 2004 software, while Digital Elevation Models (DEM) construction and SEOF are determined using Spatial Analyst extension within ArcView GIS software. Local authorities could find the results are useful to evaluate the effectiveness of flood management control, sustainability for long-term development purposes, stream restoration, rehabilitation and relocation of construction projects. 2008 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/7776/1/DATA_MODELLING_FOR_GIS_BASED_SATURATION_EXCESS_OVERLAND_FLOW.pdf Mohamad Yusoff, Izham and Abdul Rahman, Alias and Katimon, Ayob and Ismail, Wan Ruslan (2008) Data modelling for GIS based saturation excess overland flow. In: 7th International Symposium & Exhibition on Geoinformation (ISG 2008), 13 - 15 October 2008, Putra World Trade Centre(PWTC), Kuala Lumpur, Malaysia.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic T Technology (General)
spellingShingle T Technology (General)
Mohamad Yusoff, Izham
Abdul Rahman, Alias
Katimon, Ayob
Ismail, Wan Ruslan
Data modelling for GIS based saturation excess overland flow
description In a Geographic Information System (GIS), the transformation of geographical data (e.g. actual locations and physical characteristics of objects on the Earth surface) into geographic information dealt with complex series of process and procedures. In hydrologic modelling, streamflow is one of the main physical geographic apprearance within nature of hydrologic cycle. Rapid population growth,constructions, urbanization, and industrialization have increased impervious area causing hazardous impact towards rate of stormwater infiltrated into soil. Thus the overland flow in a post-development area becomes greater than the pre-development area. Within GIS, all stream networks, surface structures and its properties must be assigned and preserved with coordinate systems and map projections respectively known as georeferencing. Hence, any GIS based hydrologic applications need careful understanding in terms of map projections, coordinate systems and its transformations, scales and grid resolutions while entering spatial data. At present, there is still no unifying evidence available that provides a coherent and satisfactory explaination for the integration of the core GIS based saturation excess mechanisms into the streamflow generating process. Concepts of georeferencing need to be applied while performing GIS based saturation mechanism and to sustain the existing spatial properties of soil and land use. This study aims to visualize the effects of georeferencing system towards determine areas and total overland flow volume generated from Saturation Excess Overland Flow (SEOF) process using topographic wetness index (TWI) and antecedent soil-moisture conditions (AMC). Both factors are analysed by focusing on spatial object preservation techniques of conformal based Rectified Skew Orthomophic (RSO) and equidistance based Cassini-Soldner projections. This study is carried out at Sungai Pinang basin, located in North East coast of Penang Island, Malaysia. The areas and discharge from SEOF areas are determined and compared based on the map scale of 1 : 25 000. Digital layers of Sungai Pinang basin are constructed using Autodesk Map 2004 software, while Digital Elevation Models (DEM) construction and SEOF are determined using Spatial Analyst extension within ArcView GIS software. Local authorities could find the results are useful to evaluate the effectiveness of flood management control, sustainability for long-term development purposes, stream restoration, rehabilitation and relocation of construction projects.
format Conference or Workshop Item
author Mohamad Yusoff, Izham
Abdul Rahman, Alias
Katimon, Ayob
Ismail, Wan Ruslan
author_facet Mohamad Yusoff, Izham
Abdul Rahman, Alias
Katimon, Ayob
Ismail, Wan Ruslan
author_sort Mohamad Yusoff, Izham
title Data modelling for GIS based saturation excess overland flow
title_short Data modelling for GIS based saturation excess overland flow
title_full Data modelling for GIS based saturation excess overland flow
title_fullStr Data modelling for GIS based saturation excess overland flow
title_full_unstemmed Data modelling for GIS based saturation excess overland flow
title_sort data modelling for gis based saturation excess overland flow
publishDate 2008
url http://eprints.utm.my/id/eprint/7776/1/DATA_MODELLING_FOR_GIS_BASED_SATURATION_EXCESS_OVERLAND_FLOW.pdf
http://eprints.utm.my/id/eprint/7776/
_version_ 1643644851417251840
score 13.211869

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