FKA-File
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Input files · ALL SYS · FKT KTR · EXT JGG WGG TGG · TAL HYA TRS EIN URB VER RUE BEK EZG FKA · BOA BOD LNZ EFL · DIF
Urban catchments
also refer to Theory:Urban catchment
File
*Kanalisierte Flächen (*.FKA) *====================== *|------|-----|-----------------|--------|------------------|-----|----------|-----------------------------------------------------| *| Bez | KNG | EZG | N | Verdunstung | PSI | SCS (2) | Trockenwetterabfluss | *| | | A VG tf | Datei |Kng Sum Datei | (1) | CN VorRg| Einw. Qh JGG WGG TGG Qg JGG WGG TGG Qf JGG | *|------|-----|-----------------|--------|------------------|-----|----------|-----------------------------------------------------| *| - | 1-2 | ha % min | Nummer |1/2 mm/a Nummer | - | - mm | - l/Ed - - - l/sha - - - l/sha - | *|-<-->-|-<->-|<----><----><-->-|<------>|-+-<---->-<------>|<--->|<---><--->|-<--->-<--->-<->-<->-<->-<--->-<->-<->-<->-<--->-<->-| | A | B | C D E | F | G H I | J | K L | M N O P Q R S T U V W | *|------|-----|-----------------|--------|------------------|-----|----------|-----------------------------------------------------|
Explanations
ID:
- A: unique ID (must begin with 'F'!)
Calculation options:
- B: Calculation type [1-2]. Refers to the pervious areas; impervious areas are prinicpally calculated with the same calculation type. (1) = run-off coefficient method; (2) = SCS-Method. Further inforamtion on the needed parameters and the calculation methods can be found below.
Area parameters:
- C: area [ha]
- D: fraction of impervious area[%]
- E: longest flow time in the catchment [min]. Utilized for the calculation of the reservoir constants; KSP(1) = 0.25 * (TFA+tf)/60. ); KSP(2) = 5.0*KSP(1)
Rainfall:
- F: Rainfall file number (refer to *.EXT-File)
Evaporation:
- G: Evaporation calculation type (1 = annual evaporation; 2 = evaporation time series / file)
- H: annual evaporation [mm/a]
- The sum refering to grassland must be entered. This is overprinted internally by hydrographs according to Brandt[1] and Haude[2][3] and is adjusted to the Land use of each individual HRU.
- I: Filenumber of the evaporation time series to be utilized (refer to *.EXT-File)
- only daily values may be within the time series since time series values are overprinted with a daily pattern! (Bug 1)
Calculation type 1: run-off coefficient method:
- J: The run-off coefficient must be given
(0 < ψ ≤ 1), which is defined as:
- [math]\displaystyle{ \psi = \frac{N_{eff} + E_T + h_v}{N} }[/math]
- mit:
Neff= effective rainfallET= evaporationhv= initial losses (losses due to wetting and troughs)- also refer to http://de.wikipedia.org/wiki/Abflussbeiwert
Calculation type 2: SCS-Method: (Soil-Conservation-Service)
- K: CN-Value
(0 < CN ≤ 100) - L: 21 days prior rainfall height [mm] (distributed evenly over 21 days)
Rainfall:
- M: Inhabitants [-] in order to calculate domestic dry weather flow
- N: Qh [l/EW*d] - domestic water consumption
- O: annual pattern [-] of domestic water consumption
- P: weekly pattern [-] of domestic water consumption
- Q: daily pattern [-] of domestic water consumption
- R: Qg [l/s*ha] - commercial discharge
- S: annual pattern [-] of commercial discharge
- T: weekly pattern[-] of commercial discharge
- U: daily pattern[-] of commercial discharge
- V: Qf [l/s*ha] - inflow discharge
- W: annual pattern [-] of inflow discharge
Literature
- ↑ Brandt, T. (1979): Modell zur Abflussgangliniensimulation unter Berücksichtigung des grundwasserbürtigen Abflusses, Technischer Bericht Nr. 24 aus dem Institut für Wasserbau, Fachgebiet Ingenieurhydrologie und Hydraulik der TH Darmstadt
- ↑ Haude, W. (1954): Zur praktischen Bestimmung der aktuellen und potentiellen Evapotranspiration. – Mitteilungen des DWD, Bd. 8; Bad Kissingen
- ↑ Haude, W. (1955): Zur Bestimmung der Verdunstung auf möglichst einfache Weise. Mitteilungen des DWD, 2 (11), Bad Kissingen