The map-correlation method for ungauged catchments streamflow prediction in the Ufa River, Russian Federation

摘要

The paper investigates the problem of streamflow prediction at ungauged catchments by the use of the map-correlation method and focuses on the selection of reference stream gauges to estimate the average daily streamflow for ungauged catchments. Daily streamflow data are indeed crucial for several fields such as water management, sustainable water resource management, hydropower energy production, but the number of ungauged watersheds is still big and reliable large scale regional approaches are indeed needed as a practical response to the ungauged catchment problem. In the following, results of an application to the catchments of the rivers Ufa and main tributaries for a total of 25 catchments, is presented. The map-correlation method has been performed, where differences is made between the 'nearest' stream gauge and the 'best correlated' stream gauge criterion for reference station selection. It was found that, on average, for the case study the best performing method for the selection of reference station is the 'best correlated'.