PRAGWATER now providing daily reference evapotranspiration for Cuba


Daily reference evapotranspiration (ETo) is now available for Cuba at the following link: Northern Caribbean ETo.  The link also includes ETo data for Puerto Rico, the US Virgin Islands, Hispaniola and Jamaica.

Yesterday’s Reference Evapotranspiration

CUBA

Click for archived maps of reference evapotranspiration and  other climate variables.

 

The following links will provide guidance on scheduling irrigation using the ETo map data.

Harmsen E.W., 2012.  TECHNICAL NOTE: A Simple Web-Based Method for Scheduling Irrigation in Puerto Rico.  J. Agric. Univ. P.R. 96 (3-4) 2012.

A simple irrigation scheduling tool for using ETo maps

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PRAGWATER now providing daily reference evapotranspiration for St. Thomas, USVI


Daily reference evapotranspiration (ETo) is now available for St. Thomas (USVI) at the following link: Northern Caribbean ETo.  The link also includes ETo data for Puerto Rico, St. Croix (USVI), Hispaniola and Jamaica.

Yesterday’s Reference Evapotranspiration

St. Thomas, USVI

The following links will provide guidance on scheduling irrigation using the ETo map data.

Harmsen E.W., 2012.  TECHNICAL NOTE: A Simple Web-Based Method for Scheduling Irrigation in Puerto Rico.  J. Agric. Univ. P.R. 96 (3-4) 2012.

A simple irrigation scheduling tool for using ETo maps

Taller de Riego, Fortuna, Puerto Rico, Marzo 12, 2014


for website

Presentations:

Planificación de riego para ahorrar dinero, agua y energía

Eric Harmsen, Professor, Department of Agricultural and Biosystems Engineering, University of Puerto Rico-Mayaguez Campus.  Email: eric.harmsen@upr.edu

Presentation PDF

Diseño Preliminar de sistemas de riego por goteo

Ing. Eric Irizarry, Agricultural Engineering Extension Specialist, Cooperative Extension Service, University of Puerto Rico-Mayaguez Campus. Email: eric.irizarry@upr.edu

Presentation PDF

Fertilizantes y su manejo en sistemas de riego por goteo

Dr. David Sotomayor, Professor, Department of Crop and Environmental Science, University of Puerto Rico-Mayaguez Campus. Email: david.sotomayor@upr.edu

Presentation PDF

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The workshop planning committee would like to thank the following entities for their support.

acknowledge

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In Memoriam – Jack Keller, Irrigation Engineer


In Memoriam – Jack Keller

 

JackKeller  Jack Keller, recognized internationally for his creativity, innovations, and expertise in irrigation and water engineering and management, passed away in Denver on Sunday, Nov. 10, 2013, at the age of 85. At the time of his death, Jack was working with International Development Enterprises to develop affordable irrigation technologies for small farmers in developing countries.

Prior to earning his bachelor’s degree in civil engineering from the University of Colorado in 1953, Keller served in the Navy and the Air Force reserves. He earned a master’s degree in irrigation engineering from Colorado State University in 1955 and a PhD in agricultural and irrigation engineering from Utah State University in 1967.

Keller started his career in irrigation with the W.R. Ames Company before joining the engineering faculty at Utah State University in 1960. He served as department head of agricultural and irrigation engineering from 1980 to 1986. He founded and served as CEO of Keller-Bliesner Engineering LLC, an irrigation and water resources engineering firm based in Logan, Utah, providing consulting services to clients in the U.S. and internationally. His work took him to more than 60 countries in the Americas, Africa, Europe, and Asia.

Despite being dyslexic, Keller was a voracious reader and authored more than 100 technical papers and reports as well as two textbooks, and received four U.S. patents.

“Irrigation,” Keller wrote, “is very important to the well-being of the world.” Jack never retired. He dedicated his entire career to addressing challenges related to irrigation. Jack was well known in the national and international irrigation engineering communities, earning the respect of his colleagues for his creative, holistic problem solving based on rigorous engineering principles.

He was the recipient of numerous professional awards and honors including the Scientific American 50 Award. Keller was a dedicated member of the National Academy of Engineering and willingly fulfilled member responsibilities for more than 25 years. He was a 58-year ASABE member.

He is survived by his wife of 59 years, Sally Altick Keller, whom he met while studying at the University of Colorado. Other survivors are his brother Eugene; sons Andy (Lauren) and Jeff (Renee); daughter Judith (Nelson Cronyn); and grandchildren Ian, Antonia, Maria, Malayna, Erica, Max, Avery, and Zayk.

A member of the Baha’i Faith, Keller was buried in Boulder, Colo., according to Baha’i burial customs. A Celebration of Life gathering in Jack’s memory will be held in spring 2014 in Logan; details to be announced later. The family suggests memorial contributions in his name be given to Expanding Lives, 5541 N. Saint Louis Ave. Chicago, Ill. 60625, and Intermountain Bioneers, c/o Wells Fargo Bank, 5 S. Main Street, Logan, Uah 84321.

As published in Inside ASABE, December 20 2013

 

Irrigation System Construction Photos – Finca Alzamora, UPRM Campus


Blog for pragwater.com

Irrigation System Construction Photos – Finca Alzamora, UPRM Campus

An irrigation system was designed and constructed for an organic fruit tree orchard in the University of Puerto Rico-Mayaguez campus farm, Finca Alzamora (Lat 18.220247°, Lon -67.145497°, see Figure 1).  The system has a capacity of irrigating up to 60 trees at a rate of 25 gallons per hour.  Currently there are approximately 30 small trees at the site.

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Figure 1. The organic fruit orchard is located on the left half of the hill.

The system consists of a 1.25 in. PVC mainline laid on the slope and 8 3/4 in. PVC laterals oriented along the topographic contours.  All PVC pipe will be buried 1 ft below the surface (Figure 2).  Two-gallon per hour pressure compensating emitters used.  Up to five drip emitters or micro-spray emitters can be used.  The system header is shown in Figure 3.

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Figure 2. 1.25 in. Mainline and 3/4 in. lateral PVC tubing.

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Figure 2. Irrigation system header and mainline. The header includes a ball valve, air vacuum relief valve, cumulative water meter, filter and pressure gauge.

Numerous students from Dr. Pablo Payam’s organic fruit production course and my irrigation course helped to construct the system.  Figure 4 shows students gluing together pieces of PVC pipe.  Click here to view more photos.

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Figure 4. UPRM Agronomy students helping to construct the irrigation system.

CLICK HERE TO SEE MORE PHOTOS

 

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Daily Reference Evapotranspiration (ETo) for Jamaica


Daily reference evapotranspiration (ETo) is now available for Jamaica.  CLICK HERE to visit the new pragwater page, which provides a link to the daily image data and the method background information.  The page also provides information related to the practical application of the results for scheduling irrigation in Jamaica.

YESTERDAY’S ETo FOR JAMAICA:

DISCLAIMER: The information is provided “as is”. The authors and publishers of this information disclaim any loss or liability, either directly or indirectly as a consequence of applying the information provided herein, or in regard to the use and application of said information. No guarantee is given, either expressed or implied, in regard to the accuracy, or acceptability of the information.

ACKNOWLEDGEMENTS: This research received partial funding from the following sources: NOAA-CREST (grant NA06OAR4810162) and USDA Hatch Project (Hatch-402). Special thanks to Dr. John Mecikalski for providing the solar radiation data.  I would like to thank my student, Victor Reventos, who made the algorithm automation possible through his Python programming skills.