Precipitation is a common climatic variable used in many GIS modeling processes

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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 ...
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1answer
25 views

Failing to Extract by Mask with Small Groundwater Basins?

I am using ArcGIS for Desktop. I am working with 4km resolution precipitation rasters from the PRISM website because I am trying to calculate the total annual precipitation for each groundwater basin ...
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0answers
18 views

ArcGis layer query: Average annual precipitation for area in U.S

I need to get average precipitation for certain land parcels. I've found several layers which could offer this information but queries do not return results or indicate error. Below is example of my ...
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0answers
35 views

Error in merging two raster files (precipitation) in QGIS

The newly computed geotiff shows the extent of both raster layers, but only the data of one. If I use identify features tool it gives me only the values of the visible part not of the other part. I ...
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0answers
115 views

Simulate water runoff to get water height over each pixel of DEM

Here is my problem that I am trying to deal with. I have given a height map of around 512X512 resolution(It is Geo-referenced and I have the meta-data for this). And I have given that this area ...
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98 views

Open-source tools for run-off depth calculation

I am working on modeling surface run-off (in ArcGIS 10.2) due to a rain event (e.g., 5 year rain for a duration of 30 mins.) over an approx. area of 30 km2 for which I have a DEM and necessary soil as ...
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160 views

Depth of run-off water

I am working on modeling surface run-off due to a rain event (e.g., 5 year rain for a duration of 30 mins.) over an approx. area of 30 km2 for which I have a DEM and necessary soil as well as ...
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0answers
159 views

Calculate amount of rainfall per grid

I have precipitation measurement data of some points. I calculate the spatial distribution of rainfall using thiessen polygon method with ArcGIS. This shows amount of total rainfall on polygons. How ...
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188 views

Determining average rainfall for cumulative watershed, where only sub-watersheds defined?

I have a polygon layer with sub-catchments (sub-watersheds) and a grid of rainfall. I have used the Zonal Stats as a table to calculate the average rainfall for each sub-catchment, but I now need to ...
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0answers
919 views

SCS curve numbers for rainfall-runoff model using ArcHydro

I'm trying to assign curve numbers to one of my subbasins using ArcHydro (subbasin parameter from raster) following a tutorial as you can see here: when I turn to the step after generating my own ...
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0answers
167 views

What is “steps” and “time” in ERA-interim

I am looking for rainfall information from ERA-Interim and i found something that I don't understand. When I try to select the period of my interest, the page show me the option showed in this image: ...
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487 views

Interpolation using GDAL

I am looking for some hints here. There is a shape file with point data of rainfall sampled at a regular grid, and there is a shape file with point data of soil attributes sampled at a regular grip ...