Questions tagged [precipitation]

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

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Understanding NOAA/GFS0P25 dataset of Google Earth Engine scale change

I have noticed that there are a big differences between the forecasting values of the years 2018-2019 against 2020 for 'total_precipitation_surface'. var dataset = ee.ImageCollection('NOAA/GFS0P25') ...
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59 views

Projecting a PRISM raster from NAD1983 to Albers Equal Area PCS in ArcMap: Why does my raster change position and cell size?

I want to perform zonal statistics on PRISM precipitation rasters using watershed shapefiles as my input zone features. I'm operating under the precept that I should project all my data into the same ...
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175 views

How to handle multiple rasters (precipitation data) in QGIS?

Currently I am working at a hydrological model for Rwanda which needs monthly precipitation data averaged over the area of subcatchments. The precipitation data are 144 TIF's from CHIRPS for timespan ...
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452 views

How to download GPM rainfall data automatically?

How to download GPM rainfall data automatically? I tried to use DownloadGPM.R Function, but I think I had problem with Axel download accelerator. I guess I need to declare Axel as environment ...
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61 views

Bilinear resampling yields inaccurate/small values (Earth Engine)

I am trying to upscale / resample some GSMaP observations from 0.1 x 0.1 degrees to 30m. I want the resolution to match Landsat 8 so that I can perform some modeling. But in Google Earth Engine when ...
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164 views

Which format to display the gsmap downloaded data in QGIS?

Where can I download gsmap data especially for precipitation / rainfall and which format can be supported by QGIS software?
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72 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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452 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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171 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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1answer
58 views

GPM annual precipitation using Google earth engine

I'm trying to calculate GPM v6 annual precipitation using the google earth engine. but show this error: Line 11: ee.ImageCollection(...).select(...).filterDate(...).filterBounds(...).clip is not a ...
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56 views

Downloading JAXA/GPM_L3/GSMaP/v6/reanalysis" hourly product in Google Earth Engine

I want to download "JAXA/GPM_L3/GSMaP/v6/reanalysis" hourly product for a relatively large area approximately 300000 square km and for a long period of time, say 15 years, since this product ...
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16 views

OpenlandMap precipitation dataset

OpenlandMap precipitation dataset has a date range between 2007 to 2019. It is an image with the most accurate dataset between precipitation datasets. Is this possible to filter it's date to a ...
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102 views

Getting precipitation daily sum data from GSMap in Google Earth Engine

There are two posts about this issue, but neither seems to work properly: Reduce image collection to get daily sum from hourly precipitation GSMaP 12:00h pm to 11:00h am Reducing image collection to ...
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18 views

How should I write the TimeBand for making a chart of accumulated precipitation between dates with GSMaP

I am trying to generate in GEE a chart of the accumulated rainfall between dates (two months approximately) for a series of polygons that I have in a shape file. I am using the information from the &...
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31 views

Is it okay to do analysis on coarse rainfall data, since the area calculations can be highly misleading

I need to find the area of different classes within the rainfall data, which will be pixel-based, and since coarser data may under and over cover the study area (image below), the area calculations ...
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1answer
392 views

Standardized Precipitation Index with gamma function

Inspired from Climate Engine platform, I want to calculate Standardize Precipitation Index based on this paper, where each rainfall datasets are fitted to the gamma function to define the relationship ...
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41 views

High Resolution Monthly or Annual Precipitation data for four corner states or the Navajo Nation

I was wondering if anyone on here might know where I can find 30 meter resolution Average Annual or Average Monthly Precipitation data, that would cover the 4 corners area (UT, AZ, NM, CO) or ...
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286 views

Summing multiple years of rain data using Google Earth Engine?

I am trying to determine the what areas tend to get rain in a specific interval of time over multiple years. What I am doing is taking the filter date (in this case June 15th through July 15th) and ...
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1answer
46 views

Daily rainfall chart in a polygon between dates in GEE

I would like to make a chart of daily rainfall in a polygon of a shape file collection. var inidate = ee.Date.fromYMD(2020,5,1) var enddate = ee.Date.fromYMD(2020,11,10) // Difference between start ...