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WSP02220
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Last modified
1/26/2010 12:35:22 PM
Creation date
10/11/2006 10:59:12 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8281.400
Description
Colorado River Studies and Investigations -- Colorado River Depletion Projections
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1993
Author
Soil Cons Serv
Title
Final Environmental Impact Statement - Moapa Valley Unit - Nevada - Colorado River Salinity Control Program
Water Supply Pro - Doc Type
EIS
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<br /> <br />o <br />", <br />w <br />W <br />""1 <br />~ <br /> <br />Agricultural systems and practices <br /> <br />UooeriMoaoa Vallev <br /> <br />Groun4water is pumped for the 490 irrigated acres in the Warm <br />Spring area. Graded borders and flooding are used to irrigate <br />the h4yland and pastures. Water is conveyed in pipelines and <br />concr~te-lined ditches. Irrigation efficiency is estimated to be <br />about 47 percent due to the lack of management activities such as <br />soil moisture monitoring, water measurement an4 optimum set <br />times., <br /> <br />About :40 acres are irrigated in the vicinity of Moapa gage. The <br />crops lare pasture, hay and orchards. The irrigation efficiency <br />is es~imated to be about 40 percent. <br /> <br />The Moapa Band of Paiutes diverts Muddy River water at the Muddy <br />River Diversion at White Narrows to irrigate their 425 acres of <br />hay an~ pasture. Concrete ditches on each side of the river <br />convey: irrigation water to the fields and pastures. The <br />distribution system needs some maintenance and some repairs are <br />needed' at the diversion structure in order to control the amount <br />of water diverted and the period of time it is diverted. <br />Currently, the canal head gates are locked in the open position <br />and sofue water is continuously diverted. Irrigation efficiency <br />is est~mated to be about 40 percent because of the lack of <br />manage~ent and operation of the diversion structure, lack of <br />border$ in the fields, lack of onfarm water management items such <br />as soil moisture monitoring, irrigation scheduling, and <br />management of set times. <br /> <br />Anothe~ diversion is located near the railroad bridge at Moapa <br />for the 180 acre dairy operation in the California Wash <br />conflu~nce area. Irrigation water is conveyed in a concrete <br />canal ~hat is in fair condition. Concrete irrigation laterals <br />have deteriorated, and canvas dams are used to direct flow onto <br />fields!and pastures. The irrigation efficiency is also estimated <br />to be 40 percent due to the operation of the existing system. <br /> <br />Irrigation water is pumped from Muddy River to irrigate the 194 <br />acres qf pasture that is located between Glendale and the Narrows <br />where the Glendale gage is located. The irrigation efficiency is <br />estimated to be 40 percent. <br /> <br />Meadow ~allev Wash <br /> <br />Groundwpter is pumped to irrigate the 837 irrigated acres in the <br />Meadow Valley Wash area. There are 225 acres of pasture and 612 <br />acres of cropland. Most of the cropland is used for alfalfa hay <br />production and water is applied with wheel line sprinkler <br />systems~ Some of the alfalfa is in rotation with watermelons. <br />When a ~ield is planted to watermelons, earth field ditches, <br />siphons~ and furrows are used for irrigation. Sprinkler systems <br />are not; used on the watermelon crops because the salts in the <br />water causes leaf burn on the plants. An analysis of part of the <br /> <br />I <br />I <br />I <br />I <br />I <br />J <br />I <br />I <br />- <br /> <br />28 <br /> <br />
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