From 215460c73872a1b1a575d9e6a61de376036b6071 Mon Sep 17 00:00:00 2001
From: Paul Garlick <pgarlick@tourbillion-technology.com>
Date: Tue, 22 Oct 2019 16:29:06 +0100
Subject: check maximum and minimum heights before panel conveyance
 calculations.

---
 makeBoundary.py | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/makeBoundary.py b/makeBoundary.py
index 67209aa..8dc7ad0 100755
--- a/makeBoundary.py
+++ b/makeBoundary.py
@@ -203,20 +203,24 @@ h_i = [[] for _ in range(num_panels)]
 K_i = [[] for _ in range(num_panels)]
 Q_i = [[] for _ in range(num_panels)]
 for p in range(num_panels):
-    p_i[p], A_i[p], r_h[p], h_i[p], K_i[p], Q_i[p] = conveyance(
-        numH,
-        n_co[p],
-        xregion[p],
-        zregion[p],
-        zmin[p],
-        zmax)
-    if plotting:
-        plot_region(
-            h_i[p]-zmin[p], 'maximum depth / m',
-            r_h[p], 'hydraulic radius / m',
-            K_i[p], r'conveyance / $m^3/s$',
-            Q_i[p], r'discharge / $m^3/s$',
-            'Panel {}'.format(p))
+    if zmax > zmin[p]:
+        p_i[p], A_i[p], r_h[p], h_i[p], K_i[p], Q_i[p] = conveyance(
+            numH,
+            n_co[p],
+            xregion[p],
+            zregion[p],
+            zmin[p],
+            zmax)
+        if plotting:
+            plot_region(
+                h_i[p]-zmin[p], 'maximum depth / m',
+                r_h[p], 'hydraulic radius / m',
+                K_i[p], r'conveyance / $m^3/s$',
+                Q_i[p], r'discharge / $m^3/s$',
+                'Panel {}'.format(p))
+    else:
+        p_i[p], A_i[p], r_h[p], h_i[p], K_i[p], Q_i[p] = [
+            [0] * numH for _ in range(6)]
 
 # sort list of discharge lists according to panel fill order:
 sortedQ = [Q_i[i] for i in panel]
-- 
cgit