Re: [MODFLOW] Abridged summary of modflow@googlegroups.com - 5 updates in 1 topic

[Dr. Yohannes Yihdego]

Hi,

Possible causes are boundary condition, contrasting hydraulic conductivity (> 2 order of magnitude), poor model discretisation, solver and dry cell issues (rewetting ..initial head).

I hope this helps.

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 Dr Yohannes Yihdego

Senior Principal Hydrogeologist | Adjunct Research Fellow
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On Mon, 27 Oct 2025 at 5:30 am, <mod...@googlegroups.com> wrote:

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• Output heads are much higher than initial heads in steady-state MODFLOW model - 5 Updates

Output heads are much higher than initial heads in steady-state MODFLOW model

Ajaykumar Venkatarao <venkatarao...@gmail.com>: Oct 24 11:59AM +0530 Hello everyone,   I am facing an issue in my steady-state MODFLOW model developed in Visual MODFLOW Flex. My initial heads are around 740- 850 (MSL), but after running the simulation, the output ...more

Dawood Muhammad <dawoodm...@gmail.com>: Oct 26 10:49AM +0500 Please check the hydraulic conductivity and recharge values   Sent from my iPhone     On Sun, Oct 26, 2025 at 10:26 AM Ajaykumar Venkatarao < ...more

Dr. Jagadeesh G <jaga...@smartbhujal.com>: Oct 26 11:10AM +0530 Hi Ajaykumar,   The issue with output heads being much higher than initial heads is common in MODFLOW models. It often indicates a problem with boundary conditions or hydraulic conductivity values. ...more

Ajaykumar Venkatarao <venkatarao...@gmail.com>: Oct 26 12:58PM +0530 Thank you Jagadeesh. Its more clear explanation.   On Sun, Oct 26, 2025, 12:50 PM 'Dr. Jagadeesh G' via MODFLOW Users Group < ...more

Dr. Obasi Arisi Ikenna <ikenna...@funai.edu.ng>: Oct 26 01:17PM +0100 Ensure that you import your wells and HOBs appropriately as points. To import them as points, your latitudes and longitudes must be in UTM, if not, you may be having irregular heads.   *Ikenna * ...more

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