aniauni
Civil/Environmental
- Aug 24, 2014
- 1
Hi,
I am trying to do model rainfall-runoff in HEC-HMS. It is my first time with this program.
Component “Basin Model”:
I already have model of my basin (Basin Model and subbasin). I have for each subbasin (in program) area, Loss method: SCS CN, Transform method: SCS Unit Hydrograph, others: none (my teacher told me that).
In “Loss” I have Initial Abstraction, CN and Imperious (all is in program)
In “Transform”: Lag Time and Graph Type – Standard
All my subbasins are connected (downstream, reach, junction, etc.)
In component “Meteorologic Model”:
- Precipitation: Specifed Hyetograph
- Unit System: Metric
- Replace Missing: Abort Compute
Basins -> Include Subbasins: Yes
Options -> Total Override: No
In component “Time-series Data”
I have rainfall 24h. I already have distribution of rainfall (interval - 1 hour).
Time-series Gage: Data Source: Manual Entry; Units: Incremental Milimeters; Time Interval: 1 hour
Time window: I have 1 day (24 hours)
Table: I have my rainfall by hour and Graph: the biggest rainfall was in the middle of the time (by DVWK) This rainfall is with probability 0,2%
In component “Control Specifications”
The same time what in time-series data.
I know how to do simulation (run), but I have two more probabitities (1% and 10%). I would like to have Direct runoff (one) with this 3 probabilities, but I do not know exactly how I should to enter datas (probability 1% I probability 10%). When I am adding another Time Window (in time-series data) with the same date but different rainfall, all my time windows are with this different rainfall.
And this, what I already did is correct or maybe I made a mistake?
I am sorry for my English (is very bad, I know). Please, help me.
I need to get in program this datas:
I am trying to do model rainfall-runoff in HEC-HMS. It is my first time with this program.
Component “Basin Model”:
I already have model of my basin (Basin Model and subbasin). I have for each subbasin (in program) area, Loss method: SCS CN, Transform method: SCS Unit Hydrograph, others: none (my teacher told me that).
In “Loss” I have Initial Abstraction, CN and Imperious (all is in program)
In “Transform”: Lag Time and Graph Type – Standard
All my subbasins are connected (downstream, reach, junction, etc.)
In component “Meteorologic Model”:
- Precipitation: Specifed Hyetograph
- Unit System: Metric
- Replace Missing: Abort Compute
Basins -> Include Subbasins: Yes
Options -> Total Override: No
In component “Time-series Data”
I have rainfall 24h. I already have distribution of rainfall (interval - 1 hour).
Time-series Gage: Data Source: Manual Entry; Units: Incremental Milimeters; Time Interval: 1 hour
Time window: I have 1 day (24 hours)
Table: I have my rainfall by hour and Graph: the biggest rainfall was in the middle of the time (by DVWK) This rainfall is with probability 0,2%
In component “Control Specifications”
The same time what in time-series data.
I know how to do simulation (run), but I have two more probabitities (1% and 10%). I would like to have Direct runoff (one) with this 3 probabilities, but I do not know exactly how I should to enter datas (probability 1% I probability 10%). When I am adding another Time Window (in time-series data) with the same date but different rainfall, all my time windows are with this different rainfall.
And this, what I already did is correct or maybe I made a mistake?
I am sorry for my English (is very bad, I know). Please, help me.
I need to get in program this datas: