A new dissertation on Flood Prediction Limitations in Small Watersheds with Mountainous Terrain and High Rainfall Variability

Flood Prediction Limitations in Small Watersheds with Mountainous Terrain and High Rainfall Variability

Ph.D. Dissertation by Alejandra María Rojas González, Department of Civil Engineering and Surveying, University of Puerto Rico – Mayaguez Campus, July 2012.

Testbed Subwatershed (TBSW) location within the 4 km by 4 km NEXRAD pixel and rain gauge network.




The problem with publishing scientific articles with the traditional publishing companies is

1. Usually, the Federal government (e.g., NSF, NASA, NIH, etc.) pay for the research.
2. The University pays the salary of the researcher who writes the paper.
3. The researcher submits the paper to the publishing company and the Science Editor (usually a volunteer) finds reviewers (volunteers) to review the paper.
4. The Researcher pays the publishing company to publish his or her paper.
5. The University pays the publishing company for a subscription to access the journal article.
6. The taxpayers that paid for the research cannot access the journal article without paying for an expensive subscription.

Does something appear to be wrong with this picture?  Why do we need the publishing company??  Other than the production of hardcopy books, they really are not necessary.  And the Direct Publishing/Print on Demand movement has shown that it is possible to publish hard copy documents and make them available to a mass market.

The following links provide detailed information related to the problems with the old publishing model and ideas for moving toward more open access.

Evapotranspiration in Puerto Rico, Parts 1-5 on Youtube

IITF Science Seminar Series
USDA Forest Service International Institute of Tropical Forestry (IITF)

Satellite-Based Daily Evapotranpiration Estimation in Puerto Rico
Presented by Eric Harmsen

Part 1 Part 2 Part 3 Part 4 Part 5

Since this presentation was given in June of 2009, we have completed the operational version of the GOES-Puerto Rico Water and Energy Balance algorithm (GOES-PRWEB). For more information click HERE.


Dear Friends

Total estimated actual evapotranspiration for 2010 derived from the GOES-PRWEB algorithm.

I am sending out this “heads up” to let you know that within the next few days the GOES-Puerto Rico Water and Energy Balance (PRWEB) model will become operational.   “Operational” means that the results will appear on the website everyday.  The water and energy balance results, and all other environmental parameters will be published in “near real-time” (i.e., through yesterday’s date).   In other words, if you visit the website on April 2, 2012, for example, the results will be current up through April 1, 2012.  In addition, graphic results will be provided on a daily basis starting from January 1, 2010.

As always, feel free to respond to my posts with questions or comments.



CROP WATER USE ( HARGREAVES ET EQUATION) NEW WOLFRAM ALPHA WIDGET. Reference: Hargreaves, G. H. and Z. A. Samani, Reference Crop Evapotranspiration from Temperature. Appl. Eng. Agric., ASAE. 1(2). 1985,. pp.96-99.

Widget Application: Suppose you want to schedule irrigation by replacing the water evapotranspired by your crop each day.  1. Click on the appropriate link to get yesterdays solar radiation for your location: Puerto Rico or Northern Caribbean, 2. Check the internet for the average daily air temperature at your location (average = (minimum + maximum)/2),  3. Get the appropriate crop coefficient for your crop from this link, and 4. Finally, enter solar radiation, air temperature and crop coefficient into the widget to estimate ET. Multiply ET x acres x 1069.0663 to get the number of gallons of water you need to apply to your field.