diff --git a/src/structure/structure_orifice_submerged_params.ts b/src/structure/structure_orifice_submerged_params.ts
index 5db236bfd59b3a4f822bc93ec032adc443e0b853..2c4ca25838a77d9533c808d1702bb9bbd260d2e2 100644
--- a/src/structure/structure_orifice_submerged_params.ts
+++ b/src/structure/structure_orifice_submerged_params.ts
@@ -28,6 +28,8 @@ export class StructureOrificeSubmergedParams extends StructureParams {
         this.addParamDefinition(this.S);
         this.Cd = new ParamDefinition(this, "Cd", ParamDomainValue.POS_NULL, rCd);
         this.addParamDefinition(this.Cd);
+        // hide params
+        this.ZDV.visible = false;
     }
 
     /**