Surveying of small water reservoirs for water management purposes

Abstract

Small water reservoirs are important part of the landscape that is changing under various anthropogenic and natural processes. Knowledge of the actual parameters, such as actual water reservoir storage capacity or the amount of sediment accumulated in the water reservoir is crucial for the further operation and for the fulfilling of the water reservoir purposes. Data collection and processing for obtaining of the actual information is executable as non-contact mapping with th use of sonar and GNSS receiver. This paper describes the experience of the Department of Landscape Engineering with the use of this method for the data collection and data processing to the format of raster and vector digital elevation models of water reservoir bottom. Achieved average accuracy in the creation of these models is in the interval of 13–29 mm. These parameters make the use of non-contact mapping the available, accurate and quick option for the surveying in the water management.