From 0f9ebf2e1ece731de949599107178d915ce40aa6 Mon Sep 17 00:00:00 2001
From: JuLa96 <206707905+JuLa96@users.noreply.github.com>
Date: Thu, 9 Apr 2026 10:16:57 +0200
Subject: [PATCH 1/2] fix generateTopo.py to allow a generic debris-flow
 topography without a channel

---
 debrisframe/in1Utils/generateTopo.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/debrisframe/in1Utils/generateTopo.py b/debrisframe/in1Utils/generateTopo.py
index bf85a63..e912f8f 100644
--- a/debrisframe/in1Utils/generateTopo.py
+++ b/debrisframe/in1Utils/generateTopo.py
@@ -45,9 +45,10 @@ def debrisFlowTopoAverage(cfg):
     [A, B, fLen] = genTop.getParabolaParams(cfg)
 
     # Set surface elevation
+    zv = np.ones((nRows, nCols))
     mask = np.zeros(np.shape(xv))
     mask[np.where(xv < fLen)] = 1 
-    zv = (A * xv ** 2 + B * xv + C) * mask
+    zv = zv * (A * xv ** 2 + B * xv + C) * mask
 
     # If a channel shall be introduced
     if cfg["TOPO"].getboolean("channel"):

From f6a9105b74c6c79ca46ae32c3018a9b67f3ee5b4 Mon Sep 17 00:00:00 2001
From: JuLa96 <206707905+JuLa96@users.noreply.github.com>
Date: Wed, 15 Apr 2026 12:56:26 +0200
Subject: [PATCH 2/2] Update generateTopoCfg.ini due to fix of generateTopo.py

---
 debrisframe/in1Utils/generateTopoCfg.ini | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/debrisframe/in1Utils/generateTopoCfg.ini b/debrisframe/in1Utils/generateTopoCfg.ini
index 3922097..9bd1c5a 100644
--- a/debrisframe/in1Utils/generateTopoCfg.ini
+++ b/debrisframe/in1Utils/generateTopoCfg.ini
@@ -34,6 +34,9 @@ meanAlpha = 0
 # total fall height [m] - required for PF, HX, DFTA
 C = 709
 
+# flag to set channel
+channel = True
+
 #------------------------------------------------------
 
 # Channel parameters -----------------------------------