I have used various programs for computing SPI in my research work. Most of these make use of sliding-scales. An example for SPI-3, rainfall values for DEC-JAN-FEB could be used to compute MAR SPI-3 value, JAN-FEB-MAR for APR value and so on. I am now looking for a program that does not use sliding-scale; that is, for a given year and say SPI-3, I would like to compute only 4 values and not 12 as outputted by a sliding-scale program.
One of these tools is SPATSIM (SPAtial and Time Series Information Modeling) but it is difficult and cumbersome to use if one just wants to compute drought indices
Have you tried this? http://drought.unl.edu/MonitoringTools/DownloadableSPIProgram.aspx
You can select any time scale you want, I think until 72 months. I think this is the most widely used software for the calculation of SPI
Thank you very much Juan; YES, I have used this one. I am looking for a program that computes non-sliding SPI values. I am not sure it exists but it should for instance in the case of SPI-4, compute values for Jan-Feb-Mar; Apr-May-Jun; July-Aug-Sept and Oct-Nov-Dec and NOT sliding values: Jan-Feb-Mar; Feb-Mar-Apr; Mar-Apri-May and so on.
Kind regards
Hi
You can Use RDIT. This is user friendly software for calculating SPI, RAI, EDI, CZI, etc.
This software can draw graphs and calculate severity.
please visit : https://www.Agrimetsoft.com
Good Luck
Hi
Please read this. This article has a free software for calculating 8 drought Indices. SPI CZI, MCZI, ZSI, RAI, PN,DI, EDI
Article Estimation of meteorological drought indices based on AgMERR...
Hi,
My suggestions are: RDIT, DRINC, CLIC-MD. DRINC is indeed free and easy to use. For CLIC-MD you can get a free trial version for 1-2 weeks so you can run your data.
Good luck.
5 International Conference on Water Resources and th Arid Environments (ICWRAE 5): 425-433
7-9 January 2013, Riyadh, Saudi Arabia
Corresponding Author: Qassem Y. Tarawneh, Prince Sultan Institute for Environmental Water & Desert Research,
King Saud University, P.O.Box 2454 Riyadh 11451, Saudi Arabia.
425
Quantification of Drought in the Kingdom of Saudi Arabia
Qassem Y. Tarawneh
Try MDM from the same company. It's a previous version of RDIT but is free.
Just watch this video and finish your work. It is very easy. The program is also included with this video in googledrive. Download and use it.
https://www.youtube.com/watch?v=ELttF51H3_k
Hi,
Please why in RDIT when I want to run model in timing start (2001) and end just one year too (2001)? So it does not show all the 42 years which saved in excel sheet (xls).
I hope someone can answer this question.
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