Analysis the Accuracy of Digital Elevation Model (DEM) for Flood Modelling on Lowland Area

4th International Conference on Civil and Environmental Engineering for Sustainability

地球科学;生态环境科学;经济学

Abidin, Ku Hasna Zainurin Ku Zainol^1 ; Mohammad Razi, Mohd Adib^1 ; Mohd Bukari, Saifullizan^2

Department of Water and Environmental Engineering, Faculty of Civil and Environmental Engineering, University of Tun Hussein Onn Malaysia, Johor, Batu Pahat

86400, Malaysia^1

Department of Infrastructure and Geomatic Engineering, Faculty of Civil and Environmental Engineering, University of Tun Hussein Onn Malaysia, Batu Pahat, Johor

86400, Malaysia^2

关键词: Aerial photos;    Affected area;    Digital elevation model;    Drainage area;    Elevation data;    Flood modelling;    Malaysia;    Natural disasters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/140/1/012014/pdf
DOI  :  10.1088/1755-1315/140/1/012014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Flood is one type of natural disaster that occurs almost every year in Malaysia. Commonly the lowland areas are the worst affected areas. This kind of disaster is controllable by using an accurate data for proposing any kinds of solutions. Elevation data is one of the data used to produce solutions for flooding. Currently, the research about the application of Digital Elevation Model (DEM) in hydrology was increased where this kind of model will identify the elevation for required areas. University of Tun Hussein Onn Malaysia is one of the lowland areas which facing flood problems on 2006. Therefore, this area was chosen in order to produce DEM which focussed on University Health Centre (PKU) and drainage area around Civil and Environment Faculty (FKAAS). Unmanned Aerial Vehicle used to collect aerial photos data then undergoes a process of generating DEM according to three types of accuracy and quality from Agisoft PhotoScan software. The higher the level of accuracy and quality of DEM produced, the longer time taken to generate a DEM. The reading of the errors created while producing the DEM shows almost 0.01 different. Therefore, it has been identified there are some important parameters which influenced the accuracy of DEM.