## 2 Materials and Methods
### Methodology and Database
Within it, the hazard magnitude was established for three ranges of water depth, according to the methodology implemented at a national level: \(<\)0.5 m, 0.5-1.5 m and \(>\)1.5 m.  
In the third stage, a flood risk map was produced based on two water depth intervals (\(<\)0.5 m and \(>\)0.5 m) within the 1% flood belt and the intersection of their areas with the mapped intra-urban space for the 5 localities crossed by the Turcu River in the belt area, in order to delimit the risk classes: high--corresponding to the 1% floodplain with water depth \(>\) 0.5 m in the intra-urban area; medium--corresponding to the 1% floodplain with water depth \(<\) 0.5 m in the intra-urban area; low--corresponding to the 1% floodplain in the extra-urban areas of the five localities. Residual risk means overflow into the floodplain in the extra-village area, without causing material damage. At the national level, in accordance with Directive 2007/60/EC, the risk level was taken into account for the flood risk maps according to the magnitude of the hazard, establishing three classes according to the water depth: \(<\)0.5 m, low risk, with low impact on human population, economic, socio-cultural activities and geographical environment; 0.5-1.5 m, medium risk, with medium to high impact; \(>\)1.5 m, high risk, with very high impact. In the fourth step, the potential financial loss expressed in RON (Romanian Leu) and EURO (European single currency) for roads, land and related real estate infrastructure (mapped from recent satellite images) intersected with the 1% floodplain area was assessed. The exchange rate communicated by the National Bank of Romania on 15 November 2022, 1 EURO = 4.9032 RON (lei), was used for the calculations. In order to highlight the vulnerability of land and related real estate infrastructure, the assessment of the potential financial loss (minimum values) to flooding was carried out by going through three sub-stages of work: first--inventory of the infrastructure categories in the 1% flood belt area by mapping them based on satellite images (16 September 2019, 27 August 2020 and 21 September 2020) available through the Google Earth Pro application [59], corroborated with information from the Google Maps application database [60]; second--assignment of the minimum financial value (RON) [61] for all infrastructure categories mapped in the first stage; third--calculation of the potential financial loss (minimum values) to flooding for the inventoried building yards and all related infrastructure categories, as well as the breakdown of its results into the risk classes established in the third stage. Three calculation formulas were used to assess the potential financial loss (minimum values), calculated in RON. The first refers to the potential financial loss (minimum values) for land built with residential buildings (PFcl), PFcl = Scl/1.40 \(\times\) (C1 + C2)/2 + Tcc \(\times\) Vmtc, where Scl--constructed area with residential buildings (m\({}^{2}\)) and Scl/1.40 = Su (usable area, m\({}^{2}\)); C1(2)--building type 1(2) and (C1 + C2)/2 is the average minimum value of residential buildings (lei/m\({}^{2}\) of Su); Tcc--land courtyard buildings = Sc (m\({}^{2}\)); Vmtc--minimum value of land courtyard buildings (lei/m\({}^{2}\)), Tcc = Sc (lei/m\({}^{2}\)). The second, refers to the potential financial loss (minimum values) for land built with household anneves (PFag), PFag = Sca \(\times\) (A1 + A2)/2 + Tcc \(\times\) Vmtc, where Sca--built-up area with household annees (m\({}^{2}\)); Sca = Sc (built-up area, m\({}^{2}\)); A1(2)--household annee building type 1(2) (A1 + A2)/2 is the average minimum value of household annees (lei/m\({}^{2}\) of Sc); Tcc--land courtyard building = Sc (m\({}^{2}\)); Vmtc--minimum value of land courtyard building (lei/m\({}^{2}\)), Tcc = Sc (lei/m\({}^{2}\)). The third refers to the potential financial loss (PFec) (minimum values) for infrastructure built as spaces with economic (commercial--com. and industrial--ind.