**Syntax**

` >>>> CUMULATIVE (TIME)`

**Parent Command**

all third-level commands in block` > OBSERVATION`

**Subcommand**

` -`

**Description**

Returns the cumulative value, i.e., the integral of the model output within the time window. If keyword `ANALYZE` or `RAW` is present, the measured data will also be integrated (i.e., they are assumed to be breakthrough curves). If keyword `SUM` is present, the current output will simply be added to the previous cumulative value without m ultiplication with the time step. Note that only values at each calibration point are accumulated, which may be different from accumulation at each TOUGH time step.

**Example**

` > OBSERVATION
>> LIQUID FLOW rate
>> MASS FRACTION
>>> ELEMENT: A1__1
>>>> ANNOTATION: Cum. Tracer BTC
>>>> COMPONENT: 2
>>>> LIQUID PHASE
>>>> TIME CUMULATIVE
>>>> NO DATA
<<<<
<<<
<<`

**See Also**

` >>>> AVERAGE | >>>> SUM
`