Naslov
Hydrologic and Hydraulic Analysis of Less Studied Watersheds

Autori
Šustić, Diana ; Tadić, Zdenko ; Tadić, Lidija ; Kržak, Tomislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
24th Conference of the Danubian Countries on the Hydrological Forecasting and Hydrological Bases of Water Management-Conference Abstracts / Brilly, Mitja ; Šraj, Mojca - Ljubljana : Slovenian National Committee for IHP UNESCO, 2008, 223-223

ISBN
978-961-91090-3-8

Skup
24th Conference of the Danubian Countries on the Hydrological Forecasting and Hydrological Bases of Water Management

Mjesto i datum
Bled, Slovenija, 02.06.2008. - 04.06.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
drainage; hydrograph; mathematical models

Sažetak
Increasing flooding frequencies of settlements, roads, agricultural land and other areas, which often result in high economic losses and threaten human lives, require modelling of high water level hydrographs for less studied watersheds. Accuracy and relaibility of the results are dependent on: precipitation data, physical, geographic and other characteristics of the watershed, geometry of river valleys and waterways and selected method for analysis of precipitation to drainage relation, in other words on defining of overall hydrograph. Processing of physical and geographic characteristics of watershed and preparation of spatial data related to the geometry of river valleys and waterways are simplified by using digital elevation models and GIS tools. Calculation of hydrographs is performed by using mathematical modelling software HEC-HMS 3.1.0. After definition of hydrographs the next step is to calculate water quantities and levels in waterways based on the calculating inflow from the watershed area. (HEC-RAS 4.0) Once the mathematical model of water flow is completed including defining of input parameters: hydrographs and geometry of waterbed and inundation area, next step was to calibrate model using recorded frequent floods and data from single water gauge station, from which statistically processed data on water levels and flow rates were obtained. Calculations were processed for different values of roughness coefficient for surface runoff and roughness coefficient of waterbed and inundation area until satisfactory values are reached, including approximate flood lines and water level for 5-years reccurence interval on existing water gauge station. Obtained coefficients were used for calculations of water levels for higher order recurrences.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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