Download
soil water balance components and methods for calculation n.
Skip this Video
Loading SlideShow in 5 Seconds..
Soil Water Balance Components and Methods for Calculation PowerPoint Presentation
Download Presentation
Soil Water Balance Components and Methods for Calculation

Soil Water Balance Components and Methods for Calculation

281 Views Download Presentation
Download Presentation

Soil Water Balance Components and Methods for Calculation

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Project TR37010: UrbanDrainage Systems as Key Infrastructure in Cities and Towns Soil Water BalanceComponents and Methods for Calculation PhD Student: Željko Vasilić Mentor: Miloš Stanić Belgrade, 26.04.2013.

  2. Outline: • Introduction • Soil water balance • Evapotranspiration • Infiltration • Conclusions

  3. About project TR 37010 • „UrbanDrainage Systems as Key Infrastructure in Cities and Towns“ • Funded by Ministry of Science • Experimental catchments for investigation of urban runoff

  4. About project TR 37010 Parking area Oil separator • Experimental catchment – Belgrade Infiltration tank

  5. About project TR 37010 • Experimental catchment – Belgrade

  6. P ET Soil Water Balance E P-Pint Qsurf • Water balance components (for unsaturated soil) INF unsaturated GWR saturated • Evapotranspiration • Infiltration Process of water penetrating from the ground surface into the soil.

  7. Evapotranspiration modelling ETp – potential ET0 – Reference Ea– actual • Factors driving the process • Energy • Meteorological factors (T, Humidity, Wind speed..) • Other factors affecting Ea • Soil characteristics and conditions • Vegetation characteristics • Environmental conditions

  8. Evapotranspiration modelling • Methods for calculation • Energy balance method • Aerodynamic method • Combined method • Methods for calculation of ETp • Blaney– Cridle eq. • Pristley – Taylor eq. • Penman – Monteith eq.

  9. Penman Monteith method

  10. Penman Monteith method • Assumes horizontal surface. Modification (Allen,2006):

  11. Penman Monteith method • Results data from meteo station SmederevskaPalanka Lat 44o22’N ; Lon 20o57’ E; Altitude 121.0 m Total annual ET Orientation South Orientation North

  12. Inflitration modelling Basic equation for unsaturated flow Continuity equation (z direction): Momentum equation: Combination gives (Richard’s eq.):

  13. f(t) (mm/h) Infiltration modelling fo α1 • Other methods • Simple methods • Horton equation • Philips Equation α2>α1 • Based on approximate theory • Green Ampt method • (k=const.,sharp boundary wetting front,semi-infinitive domain…) fc t(h) Darcy’s law: Continuity eq.: Combined: Horton’s method

  14. Inflitration modelling Implementation of Simplified Green Ampt model Darcy’s law: Continuity eq.: Combined (with assumptions):

  15. Conclusions and future work • Slope and orientation of the surface can significantly affect evapotranspiration • Infiltration can be calculated using methods of different complexity • After the measured data from the experimental catchments are obtained all methods will be tested

  16. Thank You for Your Attention!!!