diff --git a/examples/telemac3d/canal/f3d_canal.slf b/examples/telemac3d/canal/f3d_canal.slf
index 201bf710dc4f9480d9965f5b76982a7eb95071d7..8a5aeda349d376c5d78c971b1cd339463314e1eb 100644
--- a/examples/telemac3d/canal/f3d_canal.slf
+++ b/examples/telemac3d/canal/f3d_canal.slf
@@ -1,3 +1,3 @@
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 size 208780
diff --git a/examples/telemac3d/canal/f3d_canal_nonhydro.slf b/examples/telemac3d/canal/f3d_canal_nonhydro.slf
index f9d5243070d42290532c8fac97781cc45e3b9e0f..7facd4fa68c41a9b552d4d1e029b4d816300c1c2 100644
--- a/examples/telemac3d/canal/f3d_canal_nonhydro.slf
+++ b/examples/telemac3d/canal/f3d_canal_nonhydro.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0ab434380ced6d67e74709bf106ac6e550b63f7eb2d4dff793e773c94ee3e65f
+oid sha256:7324165e56217d90b671c0b0164f447513be1802838c388a20b72d24d13920b6
 size 208780
diff --git a/examples/telemac3d/canal/f3d_canal_nonhydro_Z_Q_1.slf b/examples/telemac3d/canal/f3d_canal_nonhydro_Z_Q_1.slf
index 499056538456481794c069f8bf00a9e8e04597a9..96bd390043bfe0aad49b00ae95f7e18251e4f662 100644
--- a/examples/telemac3d/canal/f3d_canal_nonhydro_Z_Q_1.slf
+++ b/examples/telemac3d/canal/f3d_canal_nonhydro_Z_Q_1.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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 size 208780
diff --git a/examples/telemac3d/canal/f3d_canal_nonhydro_vit.slf b/examples/telemac3d/canal/f3d_canal_nonhydro_vit.slf
index f8f9fc53583274d52729aa5641d9be640e4a9879..6fd843359a0a9ebf020b983036cc4af046790887 100644
--- a/examples/telemac3d/canal/f3d_canal_nonhydro_vit.slf
+++ b/examples/telemac3d/canal/f3d_canal_nonhydro_vit.slf
@@ -1,3 +1,3 @@
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 size 208780
diff --git a/examples/telemac3d/canal/restart_canal_hydro.slf b/examples/telemac3d/canal/restart_canal_hydro.slf
index b911b91932f4d65fc54d0940a021f98136485c15..74d17d04ebbe89ef36f42499452445b5416b0caa 100644
--- a/examples/telemac3d/canal/restart_canal_hydro.slf
+++ b/examples/telemac3d/canal/restart_canal_hydro.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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 size 796240
diff --git a/examples/telemac3d/canal/restart_canal_hydro_par.slf b/examples/telemac3d/canal/restart_canal_hydro_par.slf
index ce8960f27cd6e71bd09727a1b021606262bd5513..a0a19b45f3792c28fe3f3c82396720f226a6a869 100644
--- a/examples/telemac3d/canal/restart_canal_hydro_par.slf
+++ b/examples/telemac3d/canal/restart_canal_hydro_par.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:7f53b8b077fb17f4b3778db36ee978f1c0ae3d2a22f306c5ab60ab362d39094a
-size 796208
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+size 796240
diff --git a/examples/telemac3d/canal/restart_canal_nonhydro.slf b/examples/telemac3d/canal/restart_canal_nonhydro.slf
index 7a326fe6c6177911f2090dad16eadbd8cd68c13f..ae23cfc564521d8d8e29a9d3d0bbf3aa60bb9f07 100644
--- a/examples/telemac3d/canal/restart_canal_nonhydro.slf
+++ b/examples/telemac3d/canal/restart_canal_nonhydro.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:58e077eacf814935a4db64648f4034859d142106ad9485e6fe817645f0e7ed24
+oid sha256:ac4a5203af21befc84d0d4759e8401d22fb8043cddd5c16b7cdb4e8195698ba1
 size 949528
diff --git a/examples/telemac3d/canal/restart_canal_nonhydro_par.slf b/examples/telemac3d/canal/restart_canal_nonhydro_par.slf
index 3de935d63be77e2d9187c31a9c44eeb80e1508d4..3d95f6e9197646180568e55b5221b7e882561b9a 100644
--- a/examples/telemac3d/canal/restart_canal_nonhydro_par.slf
+++ b/examples/telemac3d/canal/restart_canal_nonhydro_par.slf
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:d7a97f30ae3a6ed762ba168a36aedfd221234a225378c1f6b36775960380d6ec
-size 949496
+oid sha256:56a48b96fe8fd062cc47aeea731c05b60fb1c174f35505435f7fe132983649f4
+size 949528
diff --git a/examples/telemac3d/canal/t3d_canal-hydro_from_restart.cas b/examples/telemac3d/canal/t3d_canal-hydro_from_restart.cas
index aa002282088d818a79e1893439671966e7cdd023..9f61556c0ddde1b93b6adba9e6b13dca85f934a3 100644
--- a/examples/telemac3d/canal/t3d_canal-hydro_from_restart.cas
+++ b/examples/telemac3d/canal/t3d_canal-hydro_from_restart.cas
@@ -55,6 +55,3 @@ IMPLICITATION FOR VELOCITIES = 0.6
 /  FIN DES REGLAGES JMH
 /
 NON-HYDROSTATIC VERSION : NO
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-hydro_restart.cas b/examples/telemac3d/canal/t3d_canal-hydro_restart.cas
index 69289fa3e1690a48671a05bb47816999eaaa278c..b698cf5e6d016ca6da050edfbae998dad6405dd4 100644
--- a/examples/telemac3d/canal/t3d_canal-hydro_restart.cas
+++ b/examples/telemac3d/canal/t3d_canal-hydro_restart.cas
@@ -57,6 +57,3 @@ IMPLICITATION FOR VELOCITIES = 0.6
 /  FIN DES REGLAGES JMH
 /
 NON-HYDROSTATIC VERSION : NO
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-nonhydro.cas b/examples/telemac3d/canal/t3d_canal-nonhydro.cas
index 40c823a72dabc1fb7d301a9b845d61159220f646..ec081aa2331b9ca3f21325caf1793fae6aa12949 100644
--- a/examples/telemac3d/canal/t3d_canal-nonhydro.cas
+++ b/examples/telemac3d/canal/t3d_canal-nonhydro.cas
@@ -43,8 +43,6 @@ NUMBER OF HORIZONTAL LEVELS = 10
 PRESCRIBED FLOWRATES  : 0.;50.
 PRESCRIBED ELEVATIONS : 0.5;0.
 /
-TIDAL FLATS = NO
-/
 VARIABLES FOR 2D GRAPHIC PRINTOUTS = U,V,H,B,S
 VARIABLES FOR 3D GRAPHIC PRINTOUTS = Z,U,V,W
 MASS-BALANCE = YES
@@ -78,6 +76,3 @@ NON-HYDROSTATIC VERSION : YES
 /  SYSTEMES LINEAIRES DE L'OPTION NON-HYDROSTATIQUE
 /
 SOLVER FOR PPE = 6
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-nonhydro_Z_Q_1.cas b/examples/telemac3d/canal/t3d_canal-nonhydro_Z_Q_1.cas
index 53c8ca08d15285cdd907c9edbf84f3cb5c605b32..597b667ec69534473a12b5c4c8df0717ca2a6ecb 100644
--- a/examples/telemac3d/canal/t3d_canal-nonhydro_Z_Q_1.cas
+++ b/examples/telemac3d/canal/t3d_canal-nonhydro_Z_Q_1.cas
@@ -24,8 +24,6 @@ PRESCRIBED FLOWRATES  : 0.;50.
 PRESCRIBED ELEVATIONS : 0.5;0.
 STAGE-DISCHARGE CURVES : 1;0
 /
-TIDAL FLATS = NO
-/
 VARIABLES FOR 2D GRAPHIC PRINTOUTS = U,V,H,B,S
 VARIABLES FOR 3D GRAPHIC PRINTOUTS = Z,U,V,W
 MASS-BALANCE = YES
@@ -59,6 +57,3 @@ NON-HYDROSTATIC VERSION : YES
 /  SYSTEMES LINEAIRES DE L'OPTION NON-HYDROSTATIQUE
 /
 SOLVER FOR PPE = 6
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-nonhydro_from_restart.cas b/examples/telemac3d/canal/t3d_canal-nonhydro_from_restart.cas
index ffb3eb4ed76f76057abaedff5cd329261f6debdb..e429687128f193c13c7c601e46dd8fd3e2c074ec 100644
--- a/examples/telemac3d/canal/t3d_canal-nonhydro_from_restart.cas
+++ b/examples/telemac3d/canal/t3d_canal-nonhydro_from_restart.cas
@@ -24,8 +24,6 @@ NUMBER OF HORIZONTAL LEVELS = 10
 PRESCRIBED FLOWRATES  : 0.;50.
 PRESCRIBED ELEVATIONS : 0.5;0.
 /
-TIDAL FLATS = NO
-/
 VARIABLES FOR 2D GRAPHIC PRINTOUTS = U,V,H,B,S
 VARIABLES FOR 3D GRAPHIC PRINTOUTS = Z,U,V,W
 MASS-BALANCE = YES
@@ -59,6 +57,3 @@ NON-HYDROSTATIC VERSION : YES
 /  SYSTEMES LINEAIRES DE L'OPTION NON-HYDROSTATIQUE
 /
 SOLVER FOR PPE = 6
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-nonhydro_restart.cas b/examples/telemac3d/canal/t3d_canal-nonhydro_restart.cas
index d77d84f58779c08a3e0bce1513941dd2c01b9fb3..c78d93ee4d3f25fe2df969a6846b183c446f583a 100644
--- a/examples/telemac3d/canal/t3d_canal-nonhydro_restart.cas
+++ b/examples/telemac3d/canal/t3d_canal-nonhydro_restart.cas
@@ -26,8 +26,6 @@ NUMBER OF HORIZONTAL LEVELS = 10
 PRESCRIBED FLOWRATES  : 0.;50.
 PRESCRIBED ELEVATIONS : 0.5;0.
 /
-TIDAL FLATS = NO
-/
 VARIABLES FOR 2D GRAPHIC PRINTOUTS = U,V,H,B,S
 VARIABLES FOR 3D GRAPHIC PRINTOUTS = Z,U,V,W
 MASS-BALANCE = YES
@@ -61,6 +59,3 @@ NON-HYDROSTATIC VERSION : YES
 /  SYSTEMES LINEAIRES DE L'OPTION NON-HYDROSTATIQUE
 /
 SOLVER FOR PPE = 6
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal-nonhydro_vit.cas b/examples/telemac3d/canal/t3d_canal-nonhydro_vit.cas
index bc626ac602ac522eb03d80300867b9580812f05a..683aa44a8e5e7d9443f7d658b2e092c6d0e50774 100644
--- a/examples/telemac3d/canal/t3d_canal-nonhydro_vit.cas
+++ b/examples/telemac3d/canal/t3d_canal-nonhydro_vit.cas
@@ -1,23 +1,5 @@
 VELOCITY VERTICAL PROFILES : 2;2
 /
-/  136 s sur HP C3700 : 5.3
-/   75 s sur HP C3700 : 5.5  25/11/2004
-/   84 s sur HP C3700 : 5.5  04/03/2005
-/                                           (longueur de melange corrigee
-/                                             + nouvelle diffusion)
-/   68 s sur HP C3700 : 5.6  24/08/2005
-/   59 s sur HP C3700 : 5.6  14/10/2005
-/   56 s sur HP C3700 : 5.7  14/02/2007 (Nag:??s, Dell:42 s)
-/
-/   version 5.8 : passage a l'equation d'onde et solveur direct
-/   54 s sur HP C3700 : 5.8  26/07/2007 (Nag:136 s, Dell:47 s)
-/
-/   version 5.9 : retour au solveur 2
-/   51 s sur HP C3700 : 5.9  21/08/2008 (Nag:140 s, Dell:?? s)
-/
-/   version 6.2 :
-/   54 s sur HP C3700 : 25/05/2012
-/
 TITLE = 'TELEMAC 3D : CANAL'
 /
 BOUNDARY CONDITIONS FILE : geo_canal_466.cli
@@ -41,8 +23,6 @@ NUMBER OF HORIZONTAL LEVELS = 10
 PRESCRIBED VELOCITIES : 0.;0.666411
 PRESCRIBED ELEVATIONS : 0.5;0.
 /
-TIDAL FLATS = NO
-/
 VARIABLES FOR 2D GRAPHIC PRINTOUTS = U,V,H,B,S
 VARIABLES FOR 3D GRAPHIC PRINTOUTS = Z,U,V,W
 MASS-BALANCE = YES
@@ -76,6 +56,3 @@ NON-HYDROSTATIC VERSION : YES
 /  SYSTEMES LINEAIRES DE L'OPTION NON-HYDROSTATIQUE
 /
 SOLVER FOR PPE = 6
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/t3d_canal.cas b/examples/telemac3d/canal/t3d_canal.cas
index 0fb340c9c5dfd310d7a59044b95adc9847d8f0bb..336182e850f7fef34775ebbcb966b41c5ad1d62a 100644
--- a/examples/telemac3d/canal/t3d_canal.cas
+++ b/examples/telemac3d/canal/t3d_canal.cas
@@ -68,6 +68,3 @@ IMPLICITATION FOR VELOCITIES = 0.6
 /  FIN DES REGLAGES JMH
 /
 NON-HYDROSTATIC VERSION : NO
-/
-/ DEFAULT VALUE UNTIL V8P5 KEPT FOR NON REGRESSION
-TREATMENT OF NEGATIVE DEPTHS = 1
diff --git a/examples/telemac3d/canal/vnv_canal.py b/examples/telemac3d/canal/vnv_canal.py
index 2e840a04b4d64196f7b2219dbaa2b4d3f1234949..664b47cbe244101718f497e10ee4d6ac0b16ca22 100644
--- a/examples/telemac3d/canal/vnv_canal.py
+++ b/examples/telemac3d/canal/vnv_canal.py
@@ -204,17 +204,17 @@ class VnvStudy(AbstractVnvStudy):
         # Comparison with the last time frame of the reference file.
         self.check_epsilons('vnv_3:T3DRES',
                             'f3d_canal_nonhydro.slf',
-                            eps=[1.E-8])
+                            eps=[1.E-11])
 
         # Comparison with the last time frame of the reference file.
         self.check_epsilons('vnv_4:T3DRES',
                             'f3d_canal_nonhydro.slf',
-                            eps=[1.E-8])
+                            eps=[1.E-7])
 
         # Comparison between sequential and parallel run.
         self.check_epsilons('vnv_3:T3DRES',
                             'vnv_4:T3DRES',
-                            eps=[1.E-8])
+                            eps=[1.E-7])
 
         # Comparison with the restart file used to continue.
         self.check_epsilons('vnv_6:T3DRST',
@@ -254,22 +254,22 @@ class VnvStudy(AbstractVnvStudy):
         # Comparison between one way and intermediate step, parallel run.
         self.check_epsilons('vnv_4:T3DRES',
                             'vnv_13:T3DRES',
-                            eps=[1.E-11])
+                            eps=[1.E-10])
 
         # Comparison with the last time frame of the reference file (stage-discharge curve).
         self.check_epsilons('vnv_14:T3DRES',
                             'f3d_canal_nonhydro_Z_Q_1.slf',
-                            eps=[1.E-6])
+                            eps=[1.E-13])
 
         # Comparison with the last time frame of the reference file (stage-discharge curve).
         self.check_epsilons('vnv_15:T3DRES',
                             'f3d_canal_nonhydro_Z_Q_1.slf',
-                            eps=[1.E-6])
+                            eps=[1.E-8])
 
         # Comparison between sequential and parallel run (stage-discharge curve).
         self.check_epsilons('vnv_14:T3DRES',
                             'vnv_15:T3DRES',
-                            eps=[1.E-6])
+                            eps=[1.E-8])
 
         # Comparison with the last time frame of the reference file, sequential run
         # (prescribed velocity + velocity vertical profiles = 2).