RTK Hydrograph Data Fields (InfoWorks)
RTK Hydrograph data can be edited on either the RTK Hydrograph Grid Window of the Subcatchments Grid or the RTK Hydrograph Property Sheet.
All RTK Hydrograph data can be edited on the grid or the property sheet.
This table describes all the data fields used to define a RTK Hydrograph object.
Monthly RTK Hydrograph data can also be specified. Any monthly data (with the same RTK Hydrograph ID) will override the data in RTK Hydrograph object for the specified month.
Fields that are common to the majority of objects can be found in the Common Fields topic.
RTK Hydrograph Data
Database Table Name: hw_unit_hydrograph
Field Name 
Help Text 
Database Field 
Size 
Precision 
Default 
Error Lower Limit 
Error Upper Limit 
Warning Lower Limit 
Warning Upper Limit 


RTK Hydrograph ID 
A unique identifier for the RTK hydrograph. This field is used to associate a RTK hydrograph with a particular subcatchment. 
ID 
Text 
64 

0 





Response ratio R  short term 
Applicable to shortterm rainfall response component of hydrograph. Area under graph representing the proportion of rainfall entering the drainage network. 
R1 
Double 


3 

0 
1 


Time to peak T  short term 
Applicable to shortterm rainfall response component of hydrograph. Time from the onset of rainfall to the peak of the triangle of the graph. 
T1 
Double 

RS_HOURS 
3 

0 



Recession limb ratio k  short term 
Applicable to shortterm rainfall response component of hydrograph. Ratio of 'time to recession' to the 'time to peak' of the graph. 
K1 
Double 


3 

0 



Response ratio R  medium term 
Applicable to mediumterm rainfall response component of hydrograph. Area under graph representing the proportion of rainfall entering the drainage network. 
R2 
Double 


3 

0 
1 


Time to peak T  medium term 
Applicable to mediumterm rainfall response component of hydrograph. Time from the onset of rainfall to the peak of the triangle of the graph. 
T2 
Double 

RS_HOURS 
3 

0 



Recession limb ratio k  medium term 
Applicable to mediumterm rainfall response component of hydrograph. Ratio of 'time to recession' to the 'time to peak' of the graph. 
K2 
Double 


3 

0 



Response ratio R  long term 
Applicable to longterm rainfall response component of hydrograph. Area under graph representing the proportion of rainfall entering the drainage network. 
R3 
Double 


3 

0 
1 


Time to peak T  long term 
Applicable to longterm rainfall response component of hydrograph. Time from the onset of rainfall to the peak of the triangle of the graph. 
T3 
Double 

RS_HOURS 
3 

0 



Recession limb ratio k  long term 
Applicable to longterm rainfall response component of hydrograph. Ratio of 'time to recession' to the 'time to peak' of the graph. 
K3 
Double 


3 

0 



Max initial abstraction rainfall depth short term 
Maximum initial abstraction rainfall depth for the shortterm response. 
Dmax1  Double  RD  3  0  
Initial abstraction recovery rate  short term  The abstraction recovery rate for the shortterm response.  Drec1  Double  EV  3  0  
Initial abstraction depth  short term  The initial rainfall depth for the shortterm response. This value must be less than the specified Max initial abstraction rainfall depth short term one.  D01  Double  RD  3  0  
Max initial abstraction rainfall depth medium term  Maximum initial abstraction rainfall depth for the mediumterm response.  Dmax2  Double  RD  3  0  
Initial abstraction recovery rate  medium term  The abstraction recovery rate for the mediumterm response.  Drec2  Double  EV  3  0  
Initial abstraction depth  medium term  The initial rainfall depth for the mediumterm response. This value must be less than the specified Max initial abstraction rainfall depth medium term one.  D02  Double  RD  3  0  
Max initial abstraction rainfall depth long term  Maximum initial abstraction rainfall depth for the longterm response.  Dmax3  Double  RD  3  0  
Initial abstraction recovery rate  long term  The abstraction recovery rate for the longterm response.  Drec3  Double  EV  3  0  
Initial abstraction depth  long term  The initial rainfall depth for the longterm response. This value must be less than the specified Max initial abstraction rainfall depth long term one.  D03  Double  RD  3  0 