Flood Inundation Modelling Using MILHY
Abstract
The overall objective of this research project is to improve the accuracy of hydrograph prediction and to incorporate the capability of forecasting inundated areas in the MILHY2 model, whilst maintaining parsimonious data requirements. This is to be achieved by: (1) Consideration of the impact of spatially distributed precipitation on the runoff hydrograph; (2) Incorporation of appropriate hydraulic techniques which aim to improve the physical representation of out-of-bank conditions, including: (i) turbulent exchange of flow between cross-sectional segments, (ii) introduction of multiple routing reach paths to allow discrete pathways for deep floodplain flows, (iii) a comparative study of the performance of alternative flood routing techniques in the overbank environment; (3) Development of a module based scheme where the operator may select either more detailed or simpler module algorithms based on operational rules guiding data requirement, computational demands and solution specifications; (4) Validation of the methodology by: (i) study of the performance of individual modules using hydrographs and inundation maps from the Fulda database, on scales from 150 sq. cm to 2500 sq. cm, (ii) comparison of the performance of the hydrologically based MILHY3 with the two-dimensional hydrodynamic finite element model RMA-2.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA201726
Entities
People
- L. Singleton
- M. G. Anderson