<p>The answer depends on whether your data is from a single gauge or a network of gauges, and whether you have storm tracking data or not. Sounds to me like you have daily precip at a single gauge without much more information. If you know the annual average precipitation in the basin then a simple area reduction factor (ARF) calculation is basically the ratio of the annual average gauge precipitation over the basin average. </p>

<p>I am not too familiar with the literature on this, but this <a href="https://d2dtl5nnlpfr0r.cloudfront.net/tti.tamu.edu/documents/0-4642-3.pdf" rel="nofollow noreferrer">report</a> seems like a good starting point for background info.</p>

CC BY-SA 3.0
2017-08-18T13:34:40.093Z
I have daily precip at a single gauge indeed. Thanks for the report!
3TW3
CC BY-SA 3.0
2017-08-17T14:36:00.070Z
2017-08-17T14:36:00.070Z
Rob
<p>For a large catchment (>1000ha) I'm looking for some method to use a area reduction factor to adapt precipitation values. I have a large dataset of daily precipitation values but I have to use some kind of adaptation. I have don't enough data to calibrate a rainfall runoff model.</p>

<p>I have looked in some literature but there is little generally usable information. Does someone has a good reference for me? Thanks in advance.</p>

<hydrology><precipitation><rainfall>
Area reduction factor reference for precipitation
3TW3
# Area reduction factor reference for precipitation

(Asked by: username_0 on 2017-08-14)

For a large catchment (>1000ha) I'm looking for some method to use a area reduction factor to adapt precipitation values. I have a large dataset of daily precipitation values but I have to use some kind of adaptation. I have don't enough data to calibrate a rainfall runoff model.

I have looked in some literature but there is little generally usable information. Does someone has a good reference for me? Thanks in advance.

**Tags:** hydrology, precipitation, rainfall


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## 1 answers

### Answer by username_1 on 2017-08-17. Score: 2 | Accepted answer

The answer depends on whether your data is from a single gauge or a network of gauges, and whether you have storm tracking data or not. Sounds to me like you have daily precip at a single gauge without much more information. If you know the annual average precipitation in the basin then a simple area reduction factor (ARF) calculation is basically the ratio of the annual average gauge precipitation over the basin average.

I am not too familiar with the literature on this, but this [report](https://d2dtl5nnlpfr0r.cloudfront.net/tti.tamu.edu/documents/0-4642-3.pdf) seems like a good starting point for background info.

> **Comments:**
> **username_0**: I have daily precip at a single gauge indeed. Thanks for the report!  

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