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.
Megh R. Goyal, Mohammad N. Elnesr, Editors
http://www.crcpress.com/product/isbn/9781771880992
“I congratulate the editors on the publication of this book on micro irrigation design. Water for food production is clearly one of the grand challenges of the twenty-first century, and it is hoped that this book will help irrigators and famers around the world to increase the adoption of water savings technology such as micro irrigation.”
—Vincent F. Bralts, PhD, PE, Professor and Former Associate Dean, Agricultural and Biological Engineering Department, Purdue University, West Lafayette, Indiana
Recently I said to someone
“I believe the scientific basis of global warming is very simple: if you put more heat (energy) into something than comes out, the temperature will go up. A commonly shared experience we can all relate to is getting into your car on a 90-degree day only to find that the inside temperature is around 120-degrees, due to the trapped heat.”
I wanted to check my statement about the 120 degree Fahrenheit (48.9 degree C) temperature inside the car to see if it was true. I used a small automated weather station to get the inside and outside air temperatures and an infrared thermometer to measure surface temperatures. Here is what I found (in degrees C):
12:15 PM, Location Mayaguez, Puerto Rico, Sept. 22, 2014, 2001 Honda Accord, Black.
Air temperature outside 31.6 C
Air temperature inside car 49.1 C (My statement was very close!)
Surface temperatures inside car: Dashboard 88.9 C (192 F !!!!), driver seat 50C, front floor 39 C, Radio 51.6 C, steering wheel 53 C, trunk floor 56.9 C.
Pavement outside of car 52.1
Grass area near car 33.9
My office chair 17.7 C. 🙂
Today a new weather station was installed in the Finca Alzamora, UPRM campus, Mayaguez Puerto Rico. Data from the weather station are available from two websites: WeatherLink or WeatherUnderground. The WeatherUnderground site allows you to download archived data in a coma delimited text format that can be imported into Excel. Data being collected include: air temperature, dew point temperature, RH, wind speed and direction, solar radiation, UV index, soil moisture tension and soil temperature. A value of the reference evapotranspiration is available on the WeatherLink page. We are still working out a few kinks, but should have it running smoothly within a few days.
The weather station was purchased with funds from the UPRM NOAA CREST Project.
Vol. 4. Management, Performance, and Applications of Micro Irrigation
Vol. 5. Applications of Furrow and Micro Irrigation in Arid and Semi Arid Regions
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.
PRAGWATER 