1 AIT Asian Institute of Technology

Flood risk assessment under climate change scenarios in Hanumante River Basin, Nepal

AuthorPokhrel, Ayushmita
Call NumberAIT Thesis no.CC-19-02
NoteA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Climate Change and Sustainable Development, School of Environment, Resources and Development
PublisherAsian Institute of Technology
AbstractHanumante river is a perennial river located in core of the Kathmandu Valley and the settlements near the river have been experiencing frequent flooding from the river. This study uses a hydrological model called SWAT to simulate the discharge of the ungauged river in order to assess the impact of climate change. This discharge was then used as an input to a one-dimensional hydrodynamic model called HEC RAS to assess the flood risk from the river. RCMs (ACCESS, CNRM and MPI) were used for climate change projection of the basin under RCP 4.5 and RCP 8.5 scenarios. Quantile mapping technique was used for bias correction of RCMs. For simulating discharge, calibrated parameters from a bigger river basin with outlet at Khokana was used for the ungauged Hanumante basin. The result from frequency analysis of the simulated discharge for different return period was used as input into HEC RAS. Flood depth and inundation area information was obtained from the output of HEC RAS for future time period. The simulated result shows that most of the inundated areas in the future will be under high hazard category.
Year2019
TypeThesis
SchoolSchool of Environment, Resources, and Development (SERD)
DepartmentDepartment of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC))
Academic Program/FoSClimate Change and Sustainable Development (CC)
Chairperson(s)Shrestha, Sangam ;
Examination Committee(s)Sarawut NinsawatVilas Nitivattananon;
Scholarship Donor(s)AIT Fellowship;


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