Morphometric parameterization of flash flood risk assessment

impact their activity; they affect the flow rate of water, water
accumulation in the river basin, water runoff time and other attributes
that affect their intensity during flash floods and hydrological
droughts. The aim of the paper is to express the risk and impact of
flash floods in the Topla River basin (Slovakia) and its sub-basins
with regard to the morphometric characteristics of the area. The
studied locality, especially the spring of the Topla river, belongs to
the area with an existing, potentially significant flood risk threatening
not only important localities but also the population. The objective is
to support the territories with flood mitigation measures by assessing
the basin morphometric factors and classifying such areas into high,
medium and low-risk categories of flash floods. The model situation
is developed in the ArcGIS program, where the selected important
morphological characteristics are assigned to all sub-basins for the
Topla river together with its assessment. For each characteristic, the
level of risk affecting the flash flood is determined. An important part
of this study is developing a river basin susceptibility scale to flood
activity in terms of morphometric characteristics obtained from
available literature, empirical relationships and human experiences.
The result of the sensitivity risk map of the upper part of the Topla
river basin is to show where adverse impacts on people and the
surrounding environment are expected after flash floods hit (or in the
event of hydrological droughts).