diff --git a/src/equations/bbm_bbm_variable_bathymetry_1d.jl b/src/equations/bbm_bbm_variable_bathymetry_1d.jl
index d69c10bf..ee4729e4 100644
--- a/src/equations/bbm_bbm_variable_bathymetry_1d.jl
+++ b/src/equations/bbm_bbm_variable_bathymetry_1d.jl
@@ -63,7 +63,7 @@ end
 
 The initial condition that uses the dispersion relation of the Euler equations
 to approximate waves generated by a wave maker as it is done by experiments of
-Dingemans. The topography is a trapesoidal.
+Dingemans. The topography is a trapezoidal.
 
 References:
 - Magnus Svärd, Henrik Kalisch (2023)
@@ -84,16 +84,14 @@ function initial_condition_dingemans(x, t, equations::BBMBBMVariableEquations1D,
         h = A * cos(k * x)
     end
     v = sqrt(equations.gravity / k * tanh(k * eta0)) * h / eta0
-    if x < 11.01 || x >= 33.07
-        b = 0.0
-    elseif 11.01 <= x && x < 23.04
+    if 11.01 <= x && x < 23.04
         b = 0.6 * (x - 11.01) / (23.04 - 11.01)
     elseif 23.04 <= x && x < 27.04
         b = 0.6
     elseif 27.04 <= x && x < 33.07
         b = 0.6 * (33.07 - x) / (33.07 - 27.04)
     else
-        error("should not happen")
+        b = 0.0
     end
     eta = h + eta0
     D = -b
diff --git a/src/equations/svaerd_kalisch_1d.jl b/src/equations/svaerd_kalisch_1d.jl
index 3a53f376..633637ba 100644
--- a/src/equations/svaerd_kalisch_1d.jl
+++ b/src/equations/svaerd_kalisch_1d.jl
@@ -49,7 +49,7 @@ varnames(::typeof(prim2cons), ::SvaerdKalischEquations1D) = ("h", "hv", "b")
 
 The initial condition that uses the dispersion relation of the Euler equations
 to approximate waves generated by a wave maker as it is done by experiments of
-Dingemans. The topography is a trapesoidal. It is assumed that `equations.eta0 = 0.8`.
+Dingemans. The topography is a trapezoidal. It is assumed that `equations.eta0 = 0.8`.
 
 References:
 - Magnus Svärd, Henrik Kalisch (2023)
@@ -70,16 +70,14 @@ function initial_condition_dingemans(x, t, equations::SvaerdKalischEquations1D,
         h = A * cos(k * x)
     end
     v = sqrt(equations.gravity / k * tanh(k * eta0)) * h / eta0
-    if x < 11.01 || x >= 33.07
-        b = 0.0
-    elseif 11.01 <= x && x < 23.04
+    if 11.01 <= x && x < 23.04
         b = 0.6 * (x - 11.01) / (23.04 - 11.01)
     elseif 23.04 <= x && x < 27.04
         b = 0.6
     elseif 27.04 <= x && x < 33.07
         b = 0.6 * (33.07 - x) / (33.07 - 27.04)
     else
-        error("should not happen")
+        b = 0.0
     end
     eta = h + eta0
     D = -b