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Reports conclusion

1. Prepocessing
  • ArcGIS

After finishing the work with ArcMap, the team observes that ArcGIS is a useful tool for create, manipulate data sets and include a variety of information. The team use it to analyse the topographic system of Var watershed, and hydrologic parameters such as the area, the elevation of sub-catchment and their average slopes. With these analysis, we obtain the important input parameters for further modelling processes.

2. Hydrological modelling

  • MikeSHE

MIKE SHE model is an integrated hydrological modelling system for building and simulating surface waterflow and ground water flow, this model can also simulate the entire land phase.
In this study, we learned the basic steps to set up a distributed 2D hydrological model. We built up a hydrological model for flood event at 1994 Var river. Then we can calculate a discharge at the outlet, to obtain realistic results we must coupled Mike SHE and Mike 11.

  • Shetran

Many parameters have an impact on the hydrograph result from SHETRAN. This is the case for the hydraulic conductivity the soil depth  the Strickler coefficient, the diminution of the forest part and the increase of the urban area increased the peak flood,  and finally the reduction of the precipitation.

3. Hydraulical modelling

  • Mike11

MIKE 11 is a 1D programming tool which enables work with steady-unsteady flow condition or shows by using flow properties which flow occur. By editing flow properties such as channel with and depth, boundary, cross section desired flow condition can obtain and result can check, and flow can be examine with simulation.
  • Mike21 - 21 FM

2D hydraulic modelling such as MIKE 21, MIKE21FM, TELEMAC use variety of grid methods to represent geometry of working space. 2D modelling tools are needed that simulates physical process and MIKE 21 is one of them that allows decision making in flood risk assessmentsin coastal and marine areas. 2D modelling tools are convenient to use in urban and coastal areas.

  • Iber

Iber as a good graphical interface that helps to define the geometric, and hydraulic conditions. It’s an advantage to implement complex projects because in lot of cases, setting the model take a large part of the tasks. However the time of processing in this explicit 2D numerical models can be huge so we have to pay attention to make correct setting. Our results are coherent to the parameters used and it allow us to compare the changes in inputs.

  • CityCAT

CityCat is a useful tool to assess flood risk in urban areas can be caused by pluvial flood with high resolution. Through this software, man-made features effects, climate change effect, performance of urban drainage system can be examine. The software shows us that use of man-made features have significant effect on prevent flooding. Exclusion of buildings enables to interpret the results more realistic in urban areas. Although this software didn’t use to examine for Var river flooding event, it can be useful also in Nice City to examine the impact of precipitation on flood events.

4. Others

  • Feflow

FEFLOW has been proved as a very effective tool to assess the issue of groundwater resource management (quality and quantity control as well as data integration) in confined and unconfined aquifers with a very user-friendly interface. It solves saturated and unsaturated flow equations with their respective Dirichlet and Newman boundaries and provides post-processing and visualization tools in a very reasonable computation time.

  • Resilience