Questions tagged [runoff]

Questions with this tag concern surface runoff. From Wikipedia : ''Surface runoff (also known as overland flow) is the flow of water that occurs when excess stormwater, meltwater, or other sources flows over the earth's surface.''

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How to divide watersheds by iscochrones/travel times in QGIS?

I need to divide my watershed by isochrones of equal travel time to the output, dividing my watershed to inter-isochronal areas in order to use the time-area method to calculate runoff time series, in ...
MHA99's user avatar
  • 21
1 vote
1 answer

Conditional statements with formulas in Google Earth Engine

I would like to apply an expression to an image based on conditions. The part of my code that I need to do this in is where i need to calculate runoff Q2 based on values of AMC and S: var runoff_func =...
Rozy's user avatar
  • 37
-1 votes
1 answer

Combining two overlapping raster sets' attributes using ArcGIS Pro

I am ultimately trying to get a runoff curve number raster file. In order to determine the runoff curve number I need to know the soil's hydrologic group and the land use category. I have two ...
zze86's user avatar
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2 votes
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Weighted flow accumulation: using deforestation as weight?

Right off the bat: if a small river has 10% of its upstream catchment deforested, and a big river has 5%, I want that small river to have higher output values. But now it won't because of how much ...
Olivier's user avatar
  • 105
1 vote
0 answers

Urban runoff volume calculation

I was wondering if someone could help me out on how to calculate runoff volume within an urban area ? I have already produced different outputs: Filled DEM Catchment area Channel network flow ...
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2 votes
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Determining if Runoff Sinks drain to stream or drain to road?

I've tried using the linked method to determine area that drains to stream vs drains to road. For some reason when I run the watershed tool on the the raster representing stream and road features, I ...
SamericaPA's user avatar
1 vote
1 answer

How to define pour points from a stream network at a barrier for watershed calculations?

I'm looking for a way to check if cells from one raster file have contact or get close to cells from a second raster file. For example the blue raster is a barrier and the coloured is the flow ...
Max2603's user avatar
  • 323
5 votes
3 answers

How to calculate runoff in Rainfall Analysis?

I have 30 years daily rainfall data. How can i calculate the mean monthly runoff, minimum monthly runoff and maximum monthly runoff with the available rainfall data using GIS? I would like to use ...
saranya's user avatar
  • 61
3 votes
3 answers

Hydrology, operational rainfall-runoff models

I am trying to collect information about operational rainfall-runoff models used around the world. I hope to build database with country outline with attached information what organization is covering ...
Tomek's user avatar
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