Flow data

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Retang Mokua

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Apr 30, 2026, 3:39:05 PMApr 30
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Hi,

Good day,

How can I treat missing flow data? Should I enter -99 for the gaps, or leave it blank? I don't have a donot catchment to perform interpolation.

I also have an issue with the date format for observed flow. The software misaligned my data. My flow data starts from 2021, but the software moved the data for 2021 to 2024, see screenshot. This just doesn't look right. I am not sure if the problem was my date format? I used Excel to prepare my observed data.

Attached are my files.

Thanks in advance






Screenshot 2026-04-28 155226.png
Klas_Lower_flow_yyyyM.xlsx

Nancy B. Sammons

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May 1, 2026, 9:08:02 AMMay 1
to Retang Mokua, SWAT+ Editor

Retang:

This file should not have any gaps with -99 entered.  It should also include the data for all months for the simulation you are currently running. 

I hope this helps.

Nancy

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