diff --git a/README.md b/README.md
index b631573..32957ff 100644
--- a/README.md
+++ b/README.md
@@ -154,13 +154,17 @@ API documentation:
 Available functions:
 
 - [`get_qualite_rivieres_station`](https://inrae.github.io/hubeau/reference/get_qualite_rivieres.html):
-  measuring stations for river quality
+  stations (measuring points) on rivers or water bodies where water
+  samples have been taken for water quality analyses
 - [`get_qualite_rivieres_operation`](https://inrae.github.io/hubeau/reference/get_qualite_rivieres.html):
-  physico-chemical operations
+  sampling operations carried out at the stations
 - [`get_qualite_rivieres_analyse`](https://inrae.github.io/hubeau/reference/get_qualite_rivieres.html):
-  results of physico-chemical analyses
+  physico-chemical analyses carried out on samples prepared during
+  sampling operations at the stations
 - [`get_qualite_rivieres_condition_environnementale`](https://inrae.github.io/hubeau/reference/get_qualite_rivieres.html):
-  environmental conditions for analyses
+  environmental conditions (air temperature, presence of leaves, moss,
+  iridescence, etc.) observed during physico-chemical sampling
+  operations
 
 ## API “Qualité des nappes d’eau souterraines”
 
diff --git a/man-roxygen/hubeau.md b/man-roxygen/hubeau.md
index 1e0ea04..ca6c926 100644
--- a/man-roxygen/hubeau.md
+++ b/man-roxygen/hubeau.md
@@ -82,10 +82,10 @@ API documentation: <https://hubeau.eaufrance.fr/page/api-qualite-cours-deau>
 
 Available functions:
 
-- [get_qualite_rivieres_station()]: measuring stations for river quality
-- [get_qualite_rivieres_operation()]: physico-chemical operations
-- [get_qualite_rivieres_analyse()]: results of physico-chemical analyses
-- [get_qualite_rivieres_condition_environnementale()]: environmental conditions for analyses
+- [get_qualite_rivieres_station()]: stations (measuring points) on rivers or water bodies where water samples have been taken for water quality analyses
+- [get_qualite_rivieres_operation()]: sampling operations carried out at the stations
+- [get_qualite_rivieres_analyse()]: physico-chemical analyses carried out on samples prepared during sampling operations at the stations
+- [get_qualite_rivieres_condition_environnementale()]: environmental conditions (air temperature, presence of leaves, moss, iridescence, etc.) observed during physico-chemical sampling operations
 
 ## API "Qualité des nappes d'eau souterraines"
 
diff --git a/man/hubeau.Rd b/man/hubeau.Rd
index 59799cd..c90dbf1 100644
--- a/man/hubeau.Rd
+++ b/man/hubeau.Rd
@@ -101,10 +101,10 @@ API documentation: \url{https://hubeau.eaufrance.fr/page/api-qualite-cours-deau}
 
 Available functions:
 \itemize{
-\item \code{\link[=get_qualite_rivieres_station]{get_qualite_rivieres_station()}}: measuring stations for river quality
-\item \code{\link[=get_qualite_rivieres_operation]{get_qualite_rivieres_operation()}}: physico-chemical operations
-\item \code{\link[=get_qualite_rivieres_analyse]{get_qualite_rivieres_analyse()}}: results of physico-chemical analyses
-\item \code{\link[=get_qualite_rivieres_condition_environnementale]{get_qualite_rivieres_condition_environnementale()}}: environmental conditions for analyses
+\item \code{\link[=get_qualite_rivieres_station]{get_qualite_rivieres_station()}}: stations (measuring points) on rivers or water bodies where water samples have been taken for water quality analyses
+\item \code{\link[=get_qualite_rivieres_operation]{get_qualite_rivieres_operation()}}: sampling operations carried out at the stations
+\item \code{\link[=get_qualite_rivieres_analyse]{get_qualite_rivieres_analyse()}}: physico-chemical analyses carried out on samples prepared during sampling operations at the stations
+\item \code{\link[=get_qualite_rivieres_condition_environnementale]{get_qualite_rivieres_condition_environnementale()}}: environmental conditions (air temperature, presence of leaves, moss, iridescence, etc.) observed during physico-chemical sampling operations
 }
 }