UCF Rainfall Analysis 

 

UCF Rainfall Analysis  Overview and Methodology Documentation List of Sites (Analysis links) Return Period Analysis Results Kriging Analysis Results   Additional Files and Links References and Other Reports Links Authors and Researchers Visitors

The rainfall analysis and rainfall analysis software was produced as funded projects by the Southwest Florida Water Management District and the United States Geologic Survey by the Stormwater Management Institute at University of Central Florida. They are provided here as a service to engineers and technicians needing the results of this analysis.

Rainfall Reports.zip - Full Zip file of all files in the analysis

Overview and Methodology Documentation

Coming Soon: Methodology for Final Analysis

• Design Storm Rainfall Depths An Overview April 2011.docx - This is a full summary of the entire analysis with all steps in the process. Examples at the end show results for kriging with the nugget effect (April 2011). There final results are available at Krig Final Results with Nugget Effect .
• Final_Peer_Comments_Response_Wiki.pdf - Peer review with comments (February 2011)
• Summary of the Rainfall Analysis Methodology- Original summary of analysis, same as above but with results for krig without using nugget effect (2010).
• Design Storm Rainfall Depths Proposal.pdf - Original proposal (2009)
• Comparison of Rainfall Iso Methods.doc - Overview of various ISO line generation methods with results using rainfall data. (2009)
•  FEMA Rainfall Literature Review.pdf - Full literature review of rainfall analysis methodology (2009)

List of Sites (Analysis links)

• List of Sites - Analysis Results - This page contains all sites with links to the full analysis of each site. Quality control information, site results, and distribution results are all included. 
• Rainfall Analysis Software - The raw data and analysis software. Data is in 4 Microsoft Access files.
• Shape Files - The final results and rainfall contours as ESRI Shape Files.
• Autcad DXF Files - The DXF Export of all contours (Autcad DXF format).
• Surfer SRF Files - All Files in Surfer format.
• Surfer Grid Files - The Grid Files for the Analysis, Surfer and AASCII format.
• Surfer Post Files - Post maps showing values and locations used in analysis.
• Google Earth (KML) Demo - See how the maps look in Google Earth.

Return Period Analysis Results

For each return period listed a table of the predicted maximum for each duration is shown. The predicted maximum is the value that is determined by (1) fitting the annual actual maxima to a distribution, and (2) fitting these distribution results to a linear regression model. The raw maxima and curve fit parameters are shown in the analysis results for each site in the List of Sites - Analysis Results.

• 2 Year Return Period
• 3 Year Return Period
• 5 Year Return Period
• 10 Year Return Period
• 25 Year Return Period
• 50 Year Return Period
• 100 Year Return Period
• 200 Year Return Period
• 500 Year Return Period

     Master Spreadsheet: StationCoordinates.xls

     Stations used in Analysis (n >= 20) Spreadsheet: StationCoordinatesNGT20.xls 

Kriging Analysis Results  

The krig analysis was done twice, once without a nugget effect, once with a nugget effect. In standard krig (no nugget effect), the iso lines are forced to go through all values at their exact values. This makes sense if you are developing contours where all values are exact. In the case of rainfall values there exists an uncertainty to each value. The nugget effect krig takes into account the variance between spatial rainfall values and allows the iso lines to have to match exact values at a point. This in turn smooths the curves. The nugget effect krig was done in response to a peer review of the analysis which will be published upon acceptance of the curves.

Preliminary Results and Maps

• Kriging Analysis Results - The full rainfall distribution results were fit to state isohyetal plots using standard kriging techniques. Each of the results for all analyzed durations and return periods are included here. To access the full folder click here StandardKriging 

Final Results and Maps

• Krig Final Results with Nugget Effect - This page contains links to all the final results for the Krig analysis and isohyetal curves.
  
  
• Nugget Kriging (1) - Access to Directory - contains Surfer Files. As part of the peer review process Nugget Kriging was a recommendation to smooth the curves. In standard kriging, iso lines are forced to go through all geographic points at the actual value of the point. This causes a tent post effect. In the case of rainfall data, these values do have a natural variance. An error variance of 0.5 and a micro variance on 0.5 was used in the kriging analysis utilizing a second variogram specifying these effects. The result of the smoothed variograms are in the linked folders. A full explanation of the analysis is included on the page - Correcting for Rainfall Iso Variance Using the Nugget Effect.

Additional Files and Links

Rainfall Analysis Software - This is the software, source code, and support files for the software written to perform these analyses. Links to other software to support the analysis are also included.

SMADA Software and SMADA Files - This is the installation package and updates to SMADA - also available at http://cee.ucf.edu/software 

SMADA Documentation - This is the documentation to Stormwater Management and Design Aid - a Windows software for analysis and hydrograph generation. SMADA is now open source, and I am in the process of posting code files.

SMADA Code Files - Here is where to find the code files for the SMADA program.

Other Program Source Code Files - Source code to other files such as RainDigitizer, Rainplot, etc...

Linda Eaglin Thesis - Development of the Intensity Duration Frequency Curves for the State of Florida

References and Other Reports Links

References and Support Documents - Links to all the references and indirect support documents for this work and other rainfall work.

Authors and Researchers

This site is maintained by Dr. Ron Eaglin

Contributing Authors:

Dr. Martin Wanielista

Dr. Ron Eaglin

Linda Eaglin

Visitors

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  since August 2009