r.series.accumulate Makes each output cell value an accumulation function of the values assigned to the corresponding cells in the input raster map layers. Raster (r.*) ParameterMultipleInput|input|Input raster layer(s)|3.0|False ParameterSelection|method|This method will be applied to compute the accumulative values from the input maps|gdd;bedd;huglin;mean|0 ParameterNumber|scale|Scale factor for input|0.0|None|1.0|True ParameterNumber|shift|Shift factor for input|0.0|None|0.0|True ParameterString|range|Ignore values outside this range (min,max)|-10000000000,10000000000|False|True ParameterString|limits|Lower and upper accumulation limits (lower,upper)|10,30|False|True ParameterBoolean|-n|Propagate NULLs|False *ParameterBoolean|-f|Create a FCELL map (floating point single precision) as output|False OutputRaster|output|Accumulated