From 1dcb54d8fe2b14096b4c6786af03f77a4275c794 Mon Sep 17 00:00:00 2001
From: zhangsp8 <90022914+zhangsp8@users.noreply.github.com>
Date: Sun, 29 Sep 2024 15:55:39 +0800
Subject: [PATCH] Update MOD_Runoff.F90

Correct wrong code in Xinanjiang model.
---
 main/MOD_Runoff.F90 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main/MOD_Runoff.F90 b/main/MOD_Runoff.F90
index 47421c2e..d753af82 100644
--- a/main/MOD_Runoff.F90
+++ b/main/MOD_Runoff.F90
@@ -177,7 +177,7 @@ SUBROUTINE Runoff_XinAnJiang ( &
 
       ELSE
 
-         btopo = (topostd - sigmin) / (topostd - sigmax)
+         btopo = (topostd - sigmin) / (topostd + sigmax)
          btopo = min(max(btopo, 0.01), 0.5)
 
          w_int    = sum(vol_liq     (1:6) * dz_soisno(1:6))