THE CURVE NUMBER METHOD ADJUSTMENT TO THE CONDITIONS OF THE MYJAVA']JAVA RIVER SUBCATCHMENT

Methods of design flood estimation can be applied either locally or regionally. Flood risks and design flood estimation is particularly challenging. To obtain the design values in such cases where no recorded data exist, many countries have adopted procedures that fit the local conditions and requirements. One of these methods is the Soil Conservation Service Curve number (SCS-CN) method which is often used in design flood estimation for ungauged sites. The SCS-CN method is an empirical rainfall-runoff model developed by the United States Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS) (formerly called the Soil Conservation Service or SCS). Where the runoff curve number (CN) is based on the hydrological soil characteristics, land use, land management and antecedent saturation conditions of soil. This study is focused on adjustment of the SCS-CN method for the changing land use conditions in Slovak basins (with the pilot site on the Myjava River sub catchment), which relate to actual state of land use data, actual rainfall and discharge measurements of the selected river basin, and deals with the improvement of the SCS-CN method's parameters.