diff --git a/src/raster/r.accumulate/r.accumulate.html b/src/raster/r.accumulate/r.accumulate.html
index 1711237c98..fe847d9c43 100644
--- a/src/raster/r.accumulate/r.accumulate.html
+++ b/src/raster/r.accumulate/r.accumulate.html
@@ -1,7 +1,7 @@
DESCRIPTION
r.accumulate calculates weighted flow accumulation, subwatersheds,
-stream networks, and longest flow paths using a flow direction map.
+stream networks, and longest flow paths (Cho 2020) using a flow direction map.
NOTES
@@ -62,12 +62,12 @@ Longest flow path calculation
With longest_flow_path option, the module will create a longest flow
path vector map for outlet points specified by coordinates and/or
-outlet with outlet_layer option. By default, longest flow paths
-will be created as if there were subwatersheds at the outlets by calculating
-the subaccumulation map. Downstream longest flow paths will never traverse
-through upstream outlets. With -a flag, longest flow paths will be
-created in an accumulated manner resulting in an overlap between downstream and
-upstream longest flow paths.
+outlet with outlet_layer option, using the algorithm by Cho
+(2020). By default, longest flow paths will be created as if there were
+subwatersheds at the outlets by calculating the subaccumulation map. Downstream
+longest flow paths will never traverse through upstream outlets. With -a
+flag, longest flow paths will be created in an accumulated manner resulting in
+an overlap between downstream and upstream longest flow paths.
You can assign unique IDs to longest flow paths using id (with
coordinates) and/or outlet_id_column (with outlet).
@@ -100,17 +100,17 @@
Flow accumulation
r.colors map=flow_accum_new raster=flow_accum
# check difference between flow_accum and flow_accum_new
-r.mapcalc expression="accum_diff=if(flow_accum-flow_accum_new, flow_accum-flow_accum_new, null())"
+r.mapcalc expression="flow_accum_diff=if(flow_accum-flow_accum_new, flow_accum-flow_accum_new, null())"
-For some reason, there are slight differences between the two output maps.
-The yellow and purple cells show the difference raster map (accum_diff).
-The red arrows and numbers represent drainage directions
-(drain_directions) and flow accumulation by r.watershed
-(flow_accum), respectively. Note that some cells close to headwater
-cells are assigned 1 even though they are located downstream of other cells.
+
There are slight differences between the two output maps. The yellow and
+purple cells show the difference raster map (flow_accum_diff). The red
+arrows and numbers represent drainage directions (drain_directions) and
+flow accumulation by r.watershed (flow_accum), respectively.
+Note that some cells close to headwater cells are assigned 1 even though they
+are located downstream of other cells.