Geoinformation support for studies of the boundaries of flood zones in urban areas

Abstract

The article presents the results of the use of geoinformation modelling of the processes of urbanised territories’ flooding by river waters. Physical, geographical, and climatic parameters of the key river basin (Vezelka River within the boundaries of the city of Belgorod) have been determined. A list of input data and methods that were used to create geoinformation models is presented. The peculiarities of the technique of aerial photography and the creation of a digital terrain model on its basis are disclosed. The formulas for the calculation of the level of water rise and calculation of the flooding model corrected by the terrain are disclosed. The results of determining high levels of river water by calculated sites are shown, longitudinal and transverse profiles with estimated water levels during flooding with different levels of the expected probability of occurrence have been created. The final map of the boundaries of flood zones in the urban area, which are calculated using geoinformation modelling, is demonstrated. We propose that the results of geoinformation modelling of flooding scenarios for large rivers be included in the regional GIS portal.

Using vegetation indices to identify high chlorophyll tree cover in floodplains for carbon sequestration

“…The territory is a part of the Oskol and Donetsk physical-geographical region of the typical forest-steppe subzone (precipitation is 600 mm per year, average annual temperature is 7.7 °C). The investigation was carried out in the frames of the "Our Rivers" large-scale regional programme, which being based on the regional concept of the soil and water protection organization of watersheds [10] includes projects for clearing water objects, assessment of the risk of flooding of settlements, as well as developing of water protection zones [11].…”

Runoff of Water and Its Quality under the Combined Impact of Agricultural Activities and Urban Development in a Small River Basin

“…Thus, the n the anthropogenic load on the basin of the Vezelka River combines equally urbog agrogenic features, finally effecting the conditions of the water resources of the r The length of the riverbed within the boundaries of the urban territory is For the assessment of the risks of negative impacts of the aquatic objects on the built-up territories, previously, a simulation of the limits of the submergence zo carried out based on the results of the calculation of the maximum water leve The length of the riverbed within the boundaries of the urban territory is 10.5 km. For the assessment of the risks of negative impacts of the aquatic objects on the adjacent built-up territories, previously, a simulation of the limits of the submergence zones was carried out based on the results of the calculation of the maximum water levels and a spatial analysis of the digital elevation model [77]. The absolute flooding elevations of 1% expected probability of occurrence in the Vezelka River basin ranged from 127.8 m to 116.6 m at the mouth, and the difference in flooding height was 11.2 m. The flooded area amounts to 377 ha, which covers 2.3% of the city's territory.…”

Impact assessment of Eurasian beaver reintroduction on riparian phytocenosis of the Raifa forest in Volga-Kama Nature Reserve

“…In the valley of the lower reaches of the river, 3 km from the mouth, there is Lake Linevo with an area of 7 hectares. Almost ubiquitous plowing of land in the basin of the upper reaches of the Sumka River resulted in an increase in surface runoff, a sharp intensification of erosion processes, siltation of lakes, and a decrease in their areas and depths [17,18]. round plot with radius R=17,84 m; -"inland transects" (3 m×7 m), -"bank transects" (3m×7m),test plots (1m×1m);starting point with notation sign.…”

“…The fact that in places of reacclimatization these rodents in the coastal strip destroy plantations of some plant species, should be regarded as a stage in the process of restoring the natural coastal phytocomplex. In the case of beavers, they act as a natural factor, under the influence of which species fall out of the coastal stand that are not adapted to the conditions of prolonged flooding and do not have the ability to rapid vegetative reproduction by mature growth [17].…”