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KMarkert / servir-vic-training

Training materials for the VIC hydrologic model setup developed for the @SERVIR program
GNU General Public License v3.0
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About Gauge Watershed #20 #27

Open HurriCaneBQL opened 4 years ago

HurriCaneBQL commented 4 years ago

Hellow sir, what does "Gauge Watershed" excatly mean?? and how to prepare it?

KMarkert commented 4 years ago

The gauge watershed is the contributing basin (all area upstream that flows through the point on the channel). This can be calculated using GIS software and some hydrologic analysis. After the basin is calculated a fractional area at the resolution of the model needs to be calculated where 1 = whole grid cell runoff contributes, 0 = no grid cell runoff contribute. This can usually be done using a resample with mean operator or by using the snap_raster.py script.

Here is an example where the raster is the gauge watershed for the gauge, yellow triangle:

Screen Shot 2020-09-01 at 2 19 44 PM
HurriCaneBQL commented 4 years ago

Thank you very much for your help. I have used some method to get the fraction. I hope I can ask you if I have any questions in the future.

On 09/2/2020 06:17，Kel Markertnotifications@github.com wrote：

The gauge watershed is the contributing basin (all area upstream that flows through the point on the channel). This can be calculated using GIS software and some hydrologic analysis. After the basin is calculated a fractional area at the resolution of the model needs to be calculated where 1 = whole grid cell runoff contributes, 0 = no grid cell runoff contribute. This can usually be done using a resample with mean operator or by using the snap_raster.py script.

Here is an example where the raster is the gauge watershed for the gauge, yellow triangle:

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HurriCaneBQL commented 4 years ago

Hello, I have some doubts. Regarding the VIC model, the watershed runoff recharge I studied mainly relies on the recharge of glacial snowwater meltwater, but in this example only surface runoff and base flow are considered. How to increase the impact of glacier snowwater runoff recharge?