Visual OTTHYMO

Post-Development Scenarios

The post-development conditions include two scenarios:

Without Control

  • The original subcatchment (NasHyd) is divided into two equal parts.
  • One half remains modelled as a NasHyd command, while the other half is represented using a StandHyd command to account for new development.
  • StandHyd parameters for the developed area:
NHYD NAME AREA [ha] TIMP CNII XIMP IA [mm] SLPP [%] Soil Texture LGP [m] MNP Total Porosity Field Capacity DPSI [mm] Wilting Point SLPI [%] Saturated K [mm/day]
3 StandHyd – 3 14 0.65 70 0.45 5 2 ClayLoam 40 0.25 0.464 0.31 1 0.187 1 24.348

With Control

  • In this scenario, an additional StandHyd command is added to represent the roof area of the new development.
  • A RouteReservoir is introduced after the StandHyd command.
  • The original StandHyd area is reduced to 12.25 ha, with the new StandHyd representing the roof area (1.75 ha). Parameters for the roof area StandHyd are:
NHYD NAME AREA [ha] TIMP CNII XIMP IA [mm] SLPP [%] Soil Texture LGP [m] MNP Total Porosity SCP [hr] Field Capacity Wilting Point SLPI [%] Saturated K [mm/day]
5 StandHyd – 5 1.75 0.99 70 0.99 5 2 ClayLoam 40 0.25 0.464 0 0.31 0.187 1 24.348