Monterey County Field Trip

Monterey County Field Trip - Roman Ferro BRAE 236-01...

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Roman Ferro BRAE 236-01 10/27/10 Monterey County Field Trip The first stop that we made was at the Nacimiento Dam to look at the inflatable dam that they installed. The purpose of inflatable dam is to allow the lake to retain more water in flood situations. Nacimiento holds 378,000 acre feet of water, and raising the dam even a small amount will increase the amount the lake can hold by a large quantity. Of this 378,000 acre feet, SLO County is entitled to 17,500 acre feet. This water is pumped South by way of pipelines. In order to overcome the friction loss and elevation change, there are three separate pump stations equipped with 12 pumps each (400-500hp pumps). Along with these stations there are also 3 storage tanks which hold a total of 200 million gallons of water. The pipeline travels for 45 miles and has a diameter ranging anywhere between 12 and 36 inches. The total cost of this project was $176.1 million. One percent of this money went to preliminary engineering and six percent went to design. The Nacimiento Dam Project was created because of the lack of usable groundwater in the area. The next stop that we took was at Scheid Vineyards to analyze their irrigations systems. We spoke with Jeff Rianda (Contact Number: 831-594-8796) who works for the company that supplies the irrigation system, Gonzales Irrigation. They incorporated two types of filtration systems into their design: sand and disc. The sand filtration filters out the most fine of particles, but requires approximately 1-2 minutes per cycle; whereas the disc filter system is not as effective at filtering out the more fine particles, but its cycle is only 10-15 seconds. The sand filtration uses sand as a medium to filter the water, but the disc filtration uses a stack of disks that catch the particles in its criss-cross pattern. The makeup of the sand filtration system consists of one or more large tanks; it is less space efficient when compared to the disk filtration which consists of one long tube, as you can see from the picture below. After talking about the different types of filtration systems, we looked at the drip irrigation in the field. Before the water enters into the drip line, it is passes through a pressure reducing valve to ensure that there the drip line does not receive more pressure than it can handle. The drip line is also equipped with pressure compensating emitters to ensure uniform distribution. Jeff Rianda said that the maintenance only requires 4-5 people, and not a lot of work. This drip system is durable and should have a lifespan of 15-20 years. We also briefly looked at the fact that they had an irrigation system for watering the plants (drip irrigation) as well as one for frost protection. The
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This note was uploaded on 11/14/2011 for the course BRAE 236 taught by Professor Styles during the Fall '08 term at Cal Poly.

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Monterey County Field Trip - Roman Ferro BRAE 236-01...

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