TY - THES ID - 136220587 TI - Hydrological and hydrodynamic flood modelling in Ha Tinh province, Vietnam, under current climate conditions AU - Holvoet, Iris AU - Willems, Patrick. AU - Verbist, Bruno. AU - KU Leuven. Faculteit Ingenieurswetenschappen. Opleiding Master in de ingenieurswetenschappen. Bouwkunde (Leuven) PY - 2018 PB - Leuven KU Leuven. Faculteit Ingenieurswetenschappen DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:136220587 AB - Situated on the Indochina peninsula in South-East Asia, Vietnam has to deal with extreme climate conditions and a high intensity of tropical storms. Due to climate change and a growing urbanisation and population, the vulnerability towards flooding is increasing. Since the study catchment of this master thesis Ha Tinh province in Central-Vietnam is located in a low delta area between a mountain region in the west and the South-Chinese sea in the east, flood prevention in this area is extremely urgent. This project is a part of the ongoing WAMADE-project as a cooperation between Vietnam and Belgium. One of the research domains of this project is flood risk mitigation which includes the study of adaption strategies like the implementation of hard buffer structures or natural solutions such as sustainable urban development and the creation of more forest area upstream. The main goal of this master thesis in specific is to identify the areas most sensitive to flooding and quantify the impact, flooded area and depth caused by extreme flood events by creating flood maps with a certain return period. To obtain these maps, improved hydrological, hydrodynamic and flood models will be used. Improving the hydrological model implies the calculation and calibration of NAM-parameters for each subcatchment of the study domain on one hand. On the other hand, the construction of water level sensors and the execution of discharge measurements on a location which is not influenced by tides is necessary as well, in order to obtain more reliable data. The hydrodynamic model is enhanced by implementing hydraulic structures as culverts and weirs. Thirdly, a flood model in the area of Rao Cai river is modelled by implementing flood branches and link channels to connect a flood plain to the corresponding river. Finally, a flood map of an event with a return period of 100 years and 500 years is created by using composite hydrographs of the corresponding return period as input data of the hydrodynamic and flood model. With the aim of controlling the reliability of each model, several validation processes are executed. All models are established and all simulations are carried out using the same software package, MIKE powered by DHI. ER -