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Questions tagged [precipitation]

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

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0answers
16 views

Reducing 3 hourly image collection to daily and converting from “kg/m^2/s” to “mm/day” [duplicate]

I'm using GLDAS 2.1 image collection in Google Earth Engine, which has 3-hourly precipitation data from 2000 to present. I would like to make a daily precipitation and convert the data from "kg/m^2/s" ...
2
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0answers
20 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 ...
1
vote
1answer
73 views

Reducing hourly rainfall data to monthly data for particular period of time and making a timeseries chart

I am working with GSMaP image collection (hourly rainfall data) in Google Earth Engine. I would like to make a script which is calculating and making a chart of sum rainfall in particular location ...
0
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1answer
59 views

Multi-Trend in Google Earth Engine?

I've wrote below code for visualize precipitation changes over a year with ui.chart command in two different provinces. var persiann = ee.ImageCollection('NOAA/PERSIANN-CDR') .filterDate('2017-01-01',...
-1
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1answer
43 views

How can I reduce the size of shapefile (.prj, .shx, .shp) up to 8 MB? [closed]

It is sub basin photo which I want to upload to CHRS so that I can to download satellite precipitation data (https://i.stack.imgur.com/EQt3v.jpg)
0
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0answers
29 views

Classification using arcpy 2.7

I'm trying to create a tool that will consume National Weather Service 1 hour precipitation radar information and then classify groundcover based on amounts per area (in mm), then output the results ...
2
votes
1answer
73 views

Daily Rainfall data processing?

i have a .shp file of gridded daily rainfall data for an entire state. How do i calculate the sum of all 365 days (each day is a field, n recorded for 450 stations) and generate a raster? I am ...
4
votes
1answer
579 views

Reducing image collection to get daily sum from hourly precipitation and extraction of polygon data?

I'm using GSMaP image collection in Google Earth Engine, which has hourly precipitation data from 2000 to present. I have a script which helps getting mean pcp data (as a table) from polygon from each ...
8
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3answers
380 views

Locate wet patches using DEM

I'm searching for a way to determine the location of wet patches, after rainfall, in a DEM. By this, I mean puddles. We are investigating the best locations to locate paths for recreational use. ...
1
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1answer
185 views

Average precipitation raster

I want to plot mean annual precipitation data for a region. I downloaded the precipitation dataset for 1900-2014 from University of Delaware site in netCDF format. Whenever I try to open the dataset ...
1
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2answers
84 views

Interpreting GLDAS 2.1 precipitation data

I am trying to use the GLDAS 2.1 3-hourly precipitation datasets available at: The dataset is documented here: https://hydro1.gesdisc.eosdis.nasa.gov/data/GLDAS/README_GLDAS2.pdf The data is ...
1
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0answers
52 views

Defining projection for FEWS rainfall data in ArcMap? [closed]

This problem has been tackled here previously (see Manually adding spatial reference information for FEWS rainfall data in ArcMap?) but i couldnt get a solution to my problem from the thread. I am ...
1
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0answers
78 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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votes
1answer
238 views

Acquiring and understanding data from world clim? [closed]

I am a novice and trying to get monthly precipitation data of India in raster format month wise. The closest I got was from worldclim.org that too annual data for a block containing the Indian ...
3
votes
1answer
44 views

Storm Total Precip Map

I'm using ArcMap 10.5. I have two individual days of precip data rasters from NOAA/NWS. I want to combine the two days with the cumulative total storm precip displayed in a new raster. Many of the ...
1
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1answer
82 views

Batch raster operations to get Maximum Precipitation in a Catchment

I have information of maximum precipitation per grid cell for a certain area over 55 years, each year is a different matrix with the corresponding precipitation values. I know that I need to do the ...
1
vote
1answer
644 views

Calculating and displaying mean annual precipitation from CRU data

I'm trying to display mean annual precipitation (MAP) data from the CRU dataset (http://data.ceda.ac.uk/badc/cru/data/cru_ts/cru_ts_4.01/data/pre/) across a specific region. The data are monthly ...
0
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2answers
84 views

Daily temperature data portal globally

Is there any climatic portal for downloading historical climatic data ( Rainfall & Temperature) on a daily basis or at least on a decadal basis? PRISM gives only for US regions.
1
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0answers
121 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 ...
0
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1answer
663 views

Average and Annual rainfall in R? [closed]

I have rainfall data for more than 50 years in a column. I need to get total rainfall and average rainfall for each year. How can I do it in R?
0
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1answer
65 views

Solving computing time problem when grid size element increases in flood model?

I want to create high resolution and high accuracy "area of inundation" map using FLO-2D Model. I have high resolution Digital Elevation Model (DEM) and I must show small topographic details on my ...
2
votes
0answers
334 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 ...
3
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1answer
619 views

Interpolating multiple years of daily precipitation data to generate daily time series? [duplicate]

I am trying to use ArcMap ver. 10.2 to create several models using ModelBuilder. The model will be created to: interpolate 7 years of point measured precipitation data (long integer format at a daily ...
1
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0answers
100 views

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

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 ...
2
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1answer
54 views

Any standards for urban rainwater drainage network?

I am starting to work on a project related to urban drainage networks. Are there any standards out there to represent this kind of network? Relevant attributes would be things like pipe section, pipe ...
0
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1answer
50 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 ...
1
vote
1answer
679 views

How to automate the Interpolation of daily(Total-365 days) precipitation data?

I have daily rainfall data in comma-delimited text file for some location as follows Lat, Long, Precipitaion(mm) 26.0, 78.0, 23 26.50, 78.30, 200 26.70, 78.45, 405 ... I have ...
1
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0answers
70 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 ...
1
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0answers
323 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 ...
5
votes
1answer
8k views

Manually adding spatial reference information for FEWS rainfall data in ArcMap?

I am trying to match rainfall data from USGS/FEWS to coordinate locations of survey households in Uganda, so I will need to be able to project the rainfall data. So far, I downloaded the dekadal RFE 2....
1
vote
0answers
168 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 ...
1
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0answers
514 views

Depth of run-off water [closed]

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 land-...
2
votes
1answer
722 views

Method of inputing time series data in ArcGIS

I have weather stations with its geographical location ( lat,long, ht) along with daily temperature and rainfall data in time series format. I would like to use this meteorological data to interpolate ...
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1answer
146 views

Combining many individual precipitation shapefiles to show by year in ArcMap? [closed]

I have 10 years of each year precipitation in shapefiles and would like to combine them into one to show years in ArcMap layer. Do I need to use the append or union ?
1
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1answer
959 views

creating precipitation grid

I am trying to create a precipitation grid for my meteorologic model. The problem is that, I do not know what are the things I should have for me to create the grid. Can anyone tell me what are the ...
1
vote
1answer
863 views

Using rainfall data (raster) as an input to determine stream lines in Arc Hydro?

I was wondering if it is possible to use rainfall data (raster) as an input to Arc Hydro for determining stream lines? I am learning Arc Hydo and have gone through a couple of tutorials. As far as I ...
1
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2answers
7k views

Mapping Precipitation Data

I have downloaded daily precipitation data from Global Weather data website and want to create an annual precipitation map like this: example of desired map http://www.worldatlas.com/webimage/countrys/...
4
votes
2answers
801 views

Reading binary rainfall data (*.trm) in ArcGIS for Desktop?

I have some *.trm binary data that is merged Tropical Rainfall Measuring Mission (TRMM) rainfall data. I have to read it through ArcGIS for Desktop to extract rainfall data from this.
1
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0answers
444 views

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

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 ...
1
vote
1answer
597 views

How to use ArcMap for HydroPower Potential

I am trying to determine the sites for small hydropower. I have a elevation dem, rainfall data, Curve number data (from soil and landuse shapefiles). I have already used the DEM to fill sinks, find ...
2
votes
1answer
2k views

Python package for processing GRIB data in windows

I would like to know what python packages can be used to process GRIB (Gridded Binary) data on a Windows system. I know there is something called pygrib, but to use that I have to use cygwin windows ...
1
vote
2answers
2k views

Calculating watershed runoff with landuse and rainfall data?

What is the method for computing rasters of total rainfall of a given month, flow accumulation, and land use (runoff coefficient) or soil K factor? I am using ArcMap 10.
6
votes
2answers
2k views

Kriging method to use for rainfall?

I am working on an rainfall analysis and I have to interpolate some datas with kriging method. Is co-kriging suitable for the rainfall analysis?
6
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5answers
7k views

Calculating Runoff / Streams using DEM in ArcGIS

I am just curious about the workflow that many of you use for runoff/stream analysis using a DEM and create a "water network" from the results in ArcGIS 10.1? I know the average rainfall for different ...
1
vote
0answers
2k views

SCS curve numbers for rainfall-runoff model using ArcHydro [closed]

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 ...
2
votes
0answers
2k views

How to convert Rainfall Isohyet map into Raster to determine precipitation (mm) at any point? [closed]

Specifically, I have a rainfall map (Isohyets) measured in mm (precipitation)... I wanted to know a particular value (precipitation) at any point between these lines... How can I do this? Do I have ...
5
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3answers
2k views

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 ...
3
votes
4answers
2k views

climatic data from MODIS or other sources [closed]

I'm looking for climatic information in the form of raster like MODIS daily LST (Land Surface Temperature) data. I'm looking for other parameters like precipitation, humidity, air pressure and so on. ...
10
votes
3answers
310 views

Know of a source of historical 24-hour rainfall totals for US locations?

I'm looking to get historical information on the magnitude of rainfall events for a given location (Boston, Massachusetts USA). For example, to create a histogram of rainfall events by precipitation ...
5
votes
2answers
692 views

Optimum grid/pixel size for interpolating rainfall and temperature

I have a set monthly rainfall and temperature data within an approximately 100 x 100 km study area. The sampling points are unevenly distributed within the study area. Based on a paper by Janis et. ...