Research School for Socio-Economic and
Natural Sciences of the Environment
Research School for Socio-Economic and
Natural Sciences of the Environment
Agenda

Thotapitiya Arachchillage Jeewanthi Gangani Sirisena

Date: 10 December 2020
Time: 10:30 - 11:30
Location: Waaier (building12) - University of Twente

Dissertation title: 

Process based modelling of future variations in river flows and fluvial sediment fluxes to coasts in data poor regions due to climate change and human activities

Group: Water Engineering & Management, University of Twente; Coastal Systems & Engineering & Port Development, IHE Delft
Promotors: Prof Rosh Ranasinghe
Co-Promotor: Ass. Prof. Shreedhar Maskey 

Abstract:

Many of the world’s deltaic coasts are presently at a greater risk of losing their land and rich bio-diversity. Human activities in the catchment, and resulting environmental forcing due to climate change incline to exacerbate these problems in direct and indirect ways. Risks and vulnerabilities associated with climate change are predicted to be at unprecedented levels. In this context, detailed hydrological investigations are essentially required in impacts assessments of climate change and human activities on hydrological and coast systems. However, due to limited access to observed data and their availabilities, distributed hydrological modelling becomes a challenging task in impact assessments. The overall objective of this study is to assess the possible changes in hydrological regime and sediment budget of river/coast systems at data scare regions, which are attributed to climate change and human activities. The hydrological response of the study areas will be determined by identifying and utilizing the best suited distributed model structure. Efficient methods of model calibrations suited for data poor region will be thoroughly investigated to determine the optimal mode of model calibration for the selected study sites. The most representative climate forcing scenarios for the study areas will be determined. Foreseeable future changes in the hydrological responses will be examined at selected study sites in terms of their discharge and sediment flux variations due to climate change and human activities considered. River/coast sediment budget of the river/coastal systems will be computed under different climate change and human activities considered.