Hydrological analysis of rivers and their basins is a basic task that is set in hydrology. When there is a lack of data on measured values of the surface runoff in a river basin, the so-called procedure of hydrologic modeling of the river basin is used. Hydrological modeling is applied in order to determine the surface runoff based on the meteorological parameters of the river basin (precipitation, air temperature) and the basic geometrical characteristics of the watershed (area of the river basin, length of the river, land use cover, etc.).

The subject of this paper is a hydrological analysis of the river Crn Kamen up to the outlet where the construction of a stone dam with central clay core is planned for the formation of the “Lukovo Pole” reservoir, using hydrological modeling of the river basin. The aim of the research in this paper is to study all of the parameters that affect the surface water in the river basin. For this purpose, a hydrological analysis of the river basin of the river Crn Kamen was made. The definition of the physical characteristics of the watershed was performed using the GIS platform, based on a Digital Terrain Model (DTM) and an appropriate model for hydrological modeling of the river basin (SWAT). A detailed map showing the land use of the river basin was also created (CORINE). Using the HEC-HMS software, a hydrological model of the river basin of Crn Kamen was developed in order to define the surface waters of the river Crn Kamen. The hydrological sequences of flow in the river were analyzed using the available measured data: historical sequences of characteristic flows (minimum, maximum and average monthly) from the hydrological station Lukovo Pole for the period 1974-2009.

A statistical analysis of data (array of 36 elements, formed from the maximum annual flows in the period from 1974 to 2009), was performed using the HEC-SSP software package. The maximum high waters with a given recurrence period of the analyzed basin were determined, using theoretical distribution functions.