diff --git a/src/libs/antares/study/scenario-builder/hydroLevelsData.cpp b/src/libs/antares/study/scenario-builder/hydroLevelsData.cpp
index 5aabfcec9d..40bfb1d019 100644
--- a/src/libs/antares/study/scenario-builder/hydroLevelsData.cpp
+++ b/src/libs/antares/study/scenario-builder/hydroLevelsData.cpp
@@ -36,8 +36,9 @@ namespace Data
 {
 namespace ScenarioBuilder
 {
-hydroLevelsData::hydroLevelsData(std::string& iniFilePrefix) :
-addToPrefix(iniFilePrefix)
+hydroLevelsData::hydroLevelsData(std::string& iniFilePrefix,
+                                 std::function<void(Study&, MatrixType&)> applyToTarget) :
+ addToPrefix(iniFilePrefix), applyToTarget_(applyToTarget)
 {
 }
 
@@ -90,13 +91,7 @@ void hydroLevelsData::set_value(uint x, uint y, double value)
 
 bool hydroLevelsData::apply(Study& study)
 {
-    study.scenarioInitialHydroLevels.copyFrom(pHydroLevelsRules);
-    return true;
-}
-
-bool hydroLevelsData::applyHydroLevels(Matrix<double>& scenarioHydroLevels) const
-{
-    scenarioHydroLevels.copyFrom(pHydroLevelsRules);
+    applyToTarget_(study, pHydroLevelsRules);
     return true;
 }
 
diff --git a/src/libs/antares/study/scenario-builder/hydroLevelsData.h b/src/libs/antares/study/scenario-builder/hydroLevelsData.h
index f31b0d4643..70f615c632 100644
--- a/src/libs/antares/study/scenario-builder/hydroLevelsData.h
+++ b/src/libs/antares/study/scenario-builder/hydroLevelsData.h
@@ -28,6 +28,7 @@
 #define __LIBS_STUDY_SCENARIO_BUILDER_DATA_HYDRO_LEVELS_H__
 
 #include "scBuilderDataInterface.h"
+#include <functional>
 
 namespace Antares
 {
@@ -46,8 +47,9 @@ class hydroLevelsData final : public dataInterface
 
 public:
     // Constructor
-    
-    hydroLevelsData(std::string& iniFilePrefix);
+
+    hydroLevelsData(std::string& iniFilePrefix,
+                    std::function<void(Study&, Matrix<double>&)> applyToTarget);
 
     //! \name Data manupulation
     //@{
@@ -79,8 +81,7 @@ class hydroLevelsData final : public dataInterface
 
     void set_value(uint x, uint y, double value);
 
-    bool apply(Study& study);
-    bool applyHydroLevels(Matrix<double>& scenarioHydroLevels) const;
+    bool apply(Study& study) override;
 
 private:
     //! Hydro levels overlay (0 if auto)
@@ -88,6 +89,8 @@ class hydroLevelsData final : public dataInterface
     // prefix to be added when calling saveToINIFileHydroLevel
     std::string& addToPrefix;
 
+    std::function<void(Study&, Matrix<double>&)> applyToTarget_;
+
 }; // class hydroLevelsData
 
 // class hydroLevelsData : inline functions
@@ -114,6 +117,16 @@ inline double hydroLevelsData::get_value(uint x, uint y) const
     return pHydroLevelsRules.entry[y][x];
 }
 
+inline void initLevelApply(Study& study, Matrix<double>& matrix)
+{
+    study.scenarioInitialHydroLevels.copyFrom(matrix);
+}
+
+inline void finalLevelApply(Study& study, Matrix<double>& matrix)
+{
+    study.scenarioFinalHydroLevels.copyFrom(matrix);
+}
+
 } // namespace ScenarioBuilder
 } // namespace Data
 } // namespace Antares
diff --git a/src/libs/antares/study/scenario-builder/rules.cpp b/src/libs/antares/study/scenario-builder/rules.cpp
index b455435bc9..0a673c6f28 100644
--- a/src/libs/antares/study/scenario-builder/rules.cpp
+++ b/src/libs/antares/study/scenario-builder/rules.cpp
@@ -379,8 +379,8 @@ bool Rules::apply()
             returned_status = renewable[i].apply(study_) && returned_status;
             returned_status = linksNTC[i].apply(study_) && returned_status;
         }
-        returned_status = hydroInitialLevels.applyHydroLevels(study_.scenarioInitialHydroLevels) && returned_status;
-        returned_status = hydroFinalLevels.applyHydroLevels(study_.scenarioFinalHydroLevels) && returned_status;
+        returned_status = hydroInitialLevels.apply(study_) && returned_status;
+        returned_status = hydroFinalLevels.apply(study_) && returned_status;
         returned_status = binding_constraints.apply(study_) && returned_status;
     }
     else
diff --git a/src/libs/antares/study/scenario-builder/rules.h b/src/libs/antares/study/scenario-builder/rules.h
index 1f97e01c46..2f90287b51 100644
--- a/src/libs/antares/study/scenario-builder/rules.h
+++ b/src/libs/antares/study/scenario-builder/rules.h
@@ -119,10 +119,10 @@ class Rules final : private Yuni::NonCopyable<Rules>
 
     //! hydro initial levels
     std::string prefixInitial = "hl,";
-    hydroLevelsData hydroInitialLevels = hydroLevelsData(prefixInitial);
+    hydroLevelsData hydroInitialLevels = hydroLevelsData(prefixInitial, initLevelApply);
     //! hydro final levels
     std::string prefixFinal = "hfl,";
-    hydroLevelsData hydroFinalLevels = hydroLevelsData(prefixFinal);
+    hydroLevelsData hydroFinalLevels = hydroLevelsData(prefixFinal, finalLevelApply);
 
     // Links NTC
     std::vector<ntcTSNumberData> linksNTC;