## 3 Results
### The 1% Floodplain and Hazard Mapping
It was calculated by subtracting the residual risk areas from the sum of 10.663825 ha (agricultural extra-urban land in the floodplain with depth \(<\) 0.5 m) + 24.858542 ha (agricultural extra-urban land in the floodplain with depth \(>\) 0.5 m). Within the floodplain area, 16 areas were identified in the extra-village land, of which 5 areas were classified as low risk, and the other 11 were classified as residual risk. The low-risk class included: agricultural extra-village land, two areas (grassland, meadow, arable and fruit trees/shrub plantation); area corresponding to the water intake (water surface) of the Bran 1 microhydropymer plant (under conservation); areas (two) including segments of DN 73F located along the Turcu river gorge (between Cheia trup 1--Cheia trup 3 and Cheia trup 3--Moieciu de Sus); residential buildings (ten); infrastructure for economic use (two restaurants) and household annexes (thirteen). The 25 constructions in the extra-village of Tohanu Nou and Bran could be illegal only if they are not registered with a building permit attesting their allocation to the adjacent intra-village space. They are found in the band with water depth \(>\) 0.5 m (0.454075 ha) and in the band with water depth \(<\) 0.5 m (0.975849 ha). The potential financial loss (minimum values) for land, buildings and related real estate infrastructure, classified in the low-risk class area, is 10,180,798.07 lei (2,076,357.9 euro). Residual risk means overflowing into the floodplain in the extra-village, without causing material damage. The potentially affected area measures 1.982523 ha, which is the sum of the 11 areas (floodplain and small forested areas) classified with this risk category in the 1% floodplain area. Assessment of Potential Financial Loss Due to Flooding on the Turcu River for Road Segments Crossed by the 1% Floodplain and Water Depth \(>\) 0.5 m  
Roads along the Turcu Valley partially intersect the 1% floodplain. Those road segments are susceptible to erosional degradation triggered by floods and high water on the Turcu River and under the overflow conditions dictated by Q1% = 230 m\({}^{3}\)/s (Tohanu Nou HS). The following abbreviations have been used for roads at risk of flooding: DC--municipal road, DJ--county road, DN--national road and DNE--European national road. In the study area, their dimensional characteristics are: DN 73 (E 574), with a measured length of 10,077.58 m, between the center of Tohanu Nou and its exit from the intra-urban area of Moieciu de Jos (between the intersection with DJ 112H and the intersection with DN 73F and measuring 3219.36 m)--DN 73F has a total length of 8445.05 m, between the intersection with DNE 73 and the intersection between DC 56 (along the Stancioiu valley) and DC 53 (along the Bangaleasa valley); DJ 112H, with a total length of 7838.49 m. It connects at Predelut between Zarnesti and Bran (junction with DNE 73); DC 53 is a two-lane municipal road. It has a total length of 4182.47 m and a width of 5.50 m, and is completely asphalted. In the case study, the potential financial loss is expressed as the cost of rehabilitation works (full restoration and/or capital repairs and/or restoration) as set out in the contract, which can be expressed as a unit value in RON per 1 km of DC, DJ, DN or DNE subject to degradation through erosion by the Turcu River at the overflow dictated by the flow value of Q1% = 230 m\({}^{3}\)/s. The cost of these works can also be calculated for units of surface area (m\({}^{2}\)) of the roadbed, including the carriageway and the shoulder.