Event-based rainfall-runoff modelling of the Kelantan River Basin

8th International Symposium of the Digital Earth

地球科学;计算机科学

Basarudin, Z.^1 ; Adnan, N.A.^1 ; Latif, A.R.A.^1 ; Tahir, W.^2 ; Syafiqah, N.^1

Centre of Geospatial Technology, Faculty of Architecture, Planning and Surveying, Universiti Teknologi Mara, Malaysia^1

Faculty of Civil Engineering, Universiti Teknologi Mara, Malaysia^2

关键词: Change in land use;    Extreme flood events;    Extreme rainfall;    HEC-HMS hydrological models;    Hydrological modeling;    Natural disasters;    Rainfall;    Runoff modelling;    Semi-distributed;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/18/1/012084/pdf
DOI  :  10.1088/1755-1315/18/1/012084

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Flood is one of the most common natural disasters in Malaysia. According to hydrologists there are many causes that contribute to flood events. The two most dominant factors are the meteorology factor (i.e climate change) and change in land use. These two factors contributed to floods in recent decade especially in the monsoonal catchment such as Malaysia. This paper intends to quantify the influence of rainfall during extreme rainfall events on the hydrological model in the Kelantan River catchment. Therefore, two dynamic inputs were used in the study: rainfall and river discharge. The extreme flood events in 2008 and 2004 were compared based on rainfall data for both years. The events were modeled via a semi-distributed HEC-HMS hydrological model. Land use change was not incorporated in the study because the study only tries to quantify rainfall changes during these two events to simulate the discharge and runoff value. Therefore, the land use data representing the year 2004 were used as inputs in the 2008 runoff model. The study managed to demonstrate that rainfall change has a significant impact to determine the peak discharge and runoff depth for the study area.