diff --git a/swash/.gitignore b/swash/.gitignore
index 58dac9f..c9994d8 100644
--- a/swash/.gitignore
+++ b/swash/.gitignore
@@ -1,2 +1,3 @@
 /cache
+/out
 /swash_buoytoartha
diff --git a/swash/config.ini b/swash/config.ini
index 3a14e2c..8d6b9e0 100644
--- a/swash/config.ini
+++ b/swash/config.ini
@@ -11,3 +11,6 @@ psize=Psize.dat
 
 [out]
 root=cache
+
+[swash]
+out=out
diff --git a/swash/processing/post.py b/swash/processing/post.py
new file mode 100644
index 0000000..6ad9a62
--- /dev/null
+++ b/swash/processing/post.py
@@ -0,0 +1,26 @@
+import configparser
+import pathlib
+
+import numpy as np
+import pandas as pd
+import matplotlib.pyplot as plt
+
+from .read_swash import *
+
+
+config = configparser.ConfigParser()
+config.read("config.ini")
+
+cache = pathlib.Path(config.get("out", "root"))
+root = pathlib.Path(config.get("swash", "out"))
+
+bathy = pd.read_hdf(cache.joinpath("bathy.h5"), "bathy")
+n = bathy.index.size
+
+botl = read_nohead_scalar(root.joinpath("botl.dat"), n)
+dep = read_nohead_scalar(root.joinpath("dep.dat"), n)
+watl = read_nohead_scalar(root.joinpath("watl.dat"), n)
+
+plt.plot(dep.T-botl.T, label="dep")
+plt.plot(-botl.T[:, 0], label="botl")
+plt.show(block=True)
diff --git a/swash/processing/read_swash.py b/swash/processing/read_swash.py
new file mode 100644
index 0000000..1d1da2c
--- /dev/null
+++ b/swash/processing/read_swash.py
@@ -0,0 +1,30 @@
+import numpy as np
+
+
+def read_nohead(path):
+    with open(path) as file:
+        return file.read()
+
+
+def read_nohead_scalar(path, n):
+    return np.asarray(read_nohead(path).split(), dtype=np.float64).reshape(
+        (-1, n)
+    )
+
+
+def read_nohead_k(path, n, k):
+    return np.asarray(read_nohead(path).split(), dtype=np.float64).reshape(
+        (-1, n, k)
+    )
+
+
+def read_nohead_vect(path, n):
+    return np.asarray(read_nohead(path).split(), dtype=np.float64).reshape(
+        (-1, n, 2)
+    )
+
+
+def read_nohead_vect_k(path, n):
+    return np.asarray(read_nohead(path).split(), dtype=np.float64).reshape(
+        (-1, n, 2, k)
+    )