Hydrologic and Hydraulic Analysis of Less Studied Watersheds (CROSBI ID 539976)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Šustić, Diana ; Tadić, Zdenko ; Tadić, Lidija ; Kržak, Tomislav
engleski
Hydrologic and Hydraulic Analysis of Less Studied Watersheds
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.
drainage; hydrograph; mathematical models
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Podaci o prilogu
223-223.
2008.
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objavljeno
978-961-91090-3-8
Podaci o matičnoj publikaciji
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
Podaci o skupu
24th Conference of the Danubian Countries on the Hydrological Forecasting and Hydrological Bases of Water Management
poster
02.06.2008-04.06.2008
Bled, Slovenija