236 fieldtrip writeup

236 fieldtrip writeup - Shelsie Kloepper BRAE 236 10/31/11...

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Shelsie Kloepper BRAE 236 10/31/11 BRAE 236 Monterey County Field Trip On October 19 th , 2011, at 7am the BRAE 236 class and Mr. Franklin Gaudi boarded the bus bound for monterey county. Throughout the day we stopped and spoke with professionals including some Cal Poly Graduates about their jobs and the irrigation industry. We also got to witness first hand some of the different types of irrigations systems currently used in industry. The first site the class visited was the Lake Nacimiento dam. The reservoir was currently at about 85% capacity, but last winter for the first time in 30 years it reached 100% capacity. The Lake Nacimiento Dam is 1600 feet with a crest of 800 feet standing on a road elevation of 2500 feet (see figure 1 to the left). Mr. Gaudi told the class how in 2008 the county had to put in 17 feet of storage as a buffer in case of a flood. They put in an obermeyer gate to stop a storm flood from reaching Salinas. They also installed two 25-400cfs generators to pump the water to several areas. San Luis Obispo buys 17,000 acre-feet of water from this reservoir every year. And in order to receive this water the water must first be pumped 45 miles to get from the Lake Nacimiento dam to the San Luis Obispo county. This dam is a very important water supply for many of the surrounding counties and farmland. But after a quick look at the large structure the class had to continue on schedule to the next site. While driving to Monterey county the class pulled off to the side of the road to observe some of the spectacular wine country irrigation. This area mainly uses drip irrigation with the exception of a few sprinklers in the middle of the fields to control frost. About 30% to 40% of each crop is lost to frost. Some farmers put sprinklers at every other tree, while some put impact sprinklers at every tree. The mainline is placed underground usually perpendicular to the trees because it is tighter between trees than between rows. Another way to maximize water intake in the trees is to use a cover crop. The cover crop keeps moisture in the soil while reflecting sunlight off the ground to keep the soil cooler. Although each farmer must decide how much one must irrigate in each particular climate, almost always one will irrigate longer when it gets hotter in order to meet the ET of the particular crop. After this quick look at an orchard the bus got rolling again. At the second site the class visited Scheid Vineyards were we met Jeff Rianda the general
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This note was uploaded on 11/27/2011 for the course BRAE 236 taught by Professor Styles during the Spring '08 term at Cal Poly.

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236 fieldtrip writeup - Shelsie Kloepper BRAE 236 10/31/11...

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