added 3D example notebook

README.md

@@ -53,7 +53,7 @@ xc = 0   # x-coordinate of point source, m
 yc = 0   # y-coordinate of point source, m
 zc = 0   # z-coordinate of point source, m
 c0 = 100 # injection concentration, mg/L
-Q = 1    # injection rate, m^3/d
+Q = 1    # injection rate, m³/d
 
 # Aquifer parameters ----
 v = 0.05  # uniform groundwater flow velocity in x-direction, m/d

doc/examples/02_uniform_2D.ipynb

@@ -9,7 +9,7 @@
     "\n",
     "Solutions for 2D solute transport are applicable to relatively thin aquifers where the solute is well-mixed along the vertical axis and vertical concentration gradients become negligible. Alternatively, 2D solutions can be applied to a cross-section along the centerline of a plume where the model y-dimension represents the vertical axis. In those cases, it is assumed that the concentration gradients perpendicular to the centerline can be neglected, as is the case for wide solute sources. \n",
     "\n",
-    "A solution for a point source in an infinite aquifer is presented, as well as solutions for so-called 'strip' sources, which are constant-concentration sources in a semi-infinite aquifer. The source location is placed at `x = 0` and extends along the y-axis.\n",
+    "A solution for a point source in an infinite aquifer is presented, as well as solutions for so-called 'strip' sources, which are constant-concentration sources in a semi-infinite aquifer. The source location is placed at `x = 0` and has a finite extent along the y-axis.\n",
     "\n",
     "The solutions for transport in uniform background flow are available as functions from the `uniform` module and can be imported and called as:"
    ]
@@ -95,7 +95,7 @@
     "Q = 1250  # injection rate, ft³/d\n",
     "B = 100  # aquifer thickness, ft\n",
     "\n",
-    "v = 2  # # linear groundwater flow velocity, ft/h\n",
+    "v = 2  # linear groundwater flow velocity, ft/d\n",
     "al = 30  # longitudinal dispersivity, ft\n",
     "ah = 6  # horizontal transverse dispersivity, ft\n",
     "c0 = 1000  # injection concentration, mg/L\n",
@@ -130,7 +130,7 @@
    "source": [
     "## Bounded aquifer with a strip source\n",
     "\n",
-    "The `adepy.uniform.stripf` algorithm can be used to simulate 2D solute transport originating from a strip source at `x = 0` in a bounded aquifer. The aquifer is finite in the y-extent, and semi-infinite in the x-direction (no solution for negative x-values, i.e. upstream from the source). Impermeable boundaries are placed at the finite ends of the aquifer's y-extend, where the concentration gradient across the boundary is fixed at zero so the solute can not pass through. This solution may be valid for thin aquifers with a limited width, for example embedded in less-permeable or impermeable sediments which are close enough to the source as to affect its spread. As an example, chloride migration from a landfill leachate in a narrow and thin valley-infill aquifer is simulated, corresponding to sample problem 6 in [Wexler (1992)](https://doi.org/10.3133/twri03B7). Note the effect of the impermeable aquifer boundary at `y = 0`."
+    "The `adepy.uniform.stripf` algorithm can be used to simulate 2D solute transport originating from a strip source at `x = 0` in a bounded aquifer. The aquifer is finite in the y-extent, and semi-infinite in the x-direction (no solution for negative x-values, i.e. upstream from the source). Impermeable boundaries are placed at the finite ends of the aquifer's y-extent, where the concentration gradient across the boundary is fixed at zero so the solute can not pass through. This solution may be valid for thin aquifers with a limited width, for example embedded in less-permeable or impermeable sediments which are close enough to the source as to affect its spread. As an example, chloride migration from a landfill leachate in a narrow and thin valley-infill aquifer is simulated, corresponding to sample problem 6 in [Wexler (1992)](https://doi.org/10.3133/twri03B7). Note the effect of the impermeable aquifer boundary at `y = 0`."
    ]
   },
   {