diff --git a/spec/open-channel/regime_uniforme/regime_uniforme_circ.spec.ts b/spec/open-channel/regime_uniforme/regime_uniforme_circ.spec.ts
index 7ace499084ccad8efcf892fd784550a73d1dfcea..11acb873086da4f172e6641d7059914c41540ccc 100644
--- a/spec/open-channel/regime_uniforme/regime_uniforme_circ.spec.ts
+++ b/spec/open-channel/regime_uniforme/regime_uniforme_circ.spec.ts
@@ -162,7 +162,7 @@ describe("Class RegimeUniforme / section circulaire :", () => {
     });
 
     describe("en charge −", () => {
-        it("an error should be thrown if Y > D", () => { // @TODO or >= ?
+        it("an error should be thrown if sectionis circular, Y > D and YB >= D", () => {
             const paramSection = new ParamsSectionCirc(
                 2, // diamètre
                 2.1, // tirant d'eau
diff --git a/src/open-channel/regime_uniforme.ts b/src/open-channel/regime_uniforme.ts
index d94eda820d6abf5d6a9b02f5dd4831fe049d2545..d6c19271e6efb7612de003c713bf8bf700cc3d63 100644
--- a/src/open-channel/regime_uniforme.ts
+++ b/src/open-channel/regime_uniforme.ts
@@ -67,7 +67,11 @@ export class RegimeUniforme extends SectionNub {
         }
 
         // Est-ce qu'on est en charge sur une section circulaire ? @see #214
-        if (this.section instanceof cSnCirc && isGreaterThan(this.section.prms.Y.v, this.section.prms.D.v, 1e-3)) {
+        if (
+            this.section instanceof cSnCirc
+            && this.section.prms.YB.v >= this.section.prms.D.v
+            && isGreaterThan(this.section.prms.Y.v, this.section.prms.D.v, 1e-3)
+        ) {
             this.currentResult = new Result(new Message(MessageCode.ERROR_RU_CIRC_LEVEL_TOO_HIGH));
             return this.result;
         }
diff --git a/src/util/message.ts b/src/util/message.ts
index db170d8477cc80ccd798c13c6511caa971f0eeca..02dda0781e6e3418a88bbfc2a6b98b7886440867 100644
--- a/src/util/message.ts
+++ b/src/util/message.ts
@@ -240,7 +240,7 @@ export enum MessageCode {
      */
     ERROR_REMOUS_PAS_CALCUL,
 
-    /** RegimeUniforme : en charge (le tirant d'eau dépasse le diamètre de la section circulaire) */
+    /** RegimeUniforme : impossible de calculer avec uen conduite en charge (section circulaire) */
     ERROR_RU_CIRC_LEVEL_TOO_HIGH,
 
     /**