# Evaluation of Different Simulation Methods for Analyzing Flood Scenarios in the Danube Delta
## 6 Conclusions
The second method requires complex data and information for the elaboration of a hydraulic model in HEC-RAS for a 1D/2D simulation (field data, hydraulic parameters, flows, levels, types of graphical representation, networks, nodes, conditions of margin). The use of the static method in performing flood simulations does not require topo-bathymetric data like the dynamic method, which results in the fact that the static method is exempt from the time and effort allocated to perform field measurements. At the same time, the disadvantage of the static method is that the simulations cannot be calibrated with field data. The dynamic methodology has the advantage of introducing a much more complex input data set, including calibration data, which gives a higher confidence in the results obtained. From the comparison presented in Table 6 and the results obtained from the simulations, it can be seen that both methods give similar results regarding the flooded area, the differences being outlined in the percentage of coverage of the flooded area in the localities. However, the dynamic method is much more realistic compared to the static method, due to the multiple advantages that the HEC-RAS program has, such as: multiple functions and options, choice of simulation period, facilities related to setting initial and boundary conditions, facilities related to the flow slope, etc. The approach of 1D/2D hydraulic modeling techniques is more realistic compared to the static method, taking into account the fact that the real flooded areas were determined for different scenarios of dyke breach with a duration of 24 h (the time of maintaining the breach), which could allow a real estimate of the material and human resources needed to intervene in an emergency. The approach with several scenarios allowed the testing of the water flow capacity in the settlements, determining to what extent the surfaces inside the settlements would be affected. The area targeted, located in the Danube Delta, presents an elevated danger of inundations. The novelty of this work is based on showing different complex techniques how can be used to assess flood extent by apply two different flood simulation methods. At the same time the used methods represent a low to medium cost solution, by which flood maps can be generated in previously unassessed areas. The purpose of the flooding maps is to support decision making, the elaboration of flood management plans, public awareness, or other activities of general interest. Furthermore, the analysis performed is important, and there is a huge potential for the development of a robust approach in other similar situations for any type of area. Last but not least, ideas for a new research work were derived from this paper, entailing the use of the results in order to assess the possible flood risk and hazard for all the presented localities. In this case repeated in situ bathymetric measurements will be done, in order to assess the spatial-temporal differences, and to obtain an updated hydrological model. [PERSON] processed the numerical data, designed the figures and tables and wrote the first form of the manuscript, [PERSON] contributed to the interpretation of the results and [PERSON] supervised the work. [PERSON] and [PERSON] performed the literature review, corrected the manuscript and acted as corresponding author. All authors have read and agreed to the published version of the manuscript. This work was supported by the project \"EXPERT\", financed by the Romanian Ministry of Research and Innovation, Contract No. 14 PFE/17.10.2018. This work was supported by the project \"Excellence, performance and competitiveness in the Research, Development and Innovation activities at \"Dunarea de Jos\" University of Galati\", acronym \"EXPERT\".