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<br />N <br />01 <br />.p... <br />00 <br /> <br />November 1985, prepared by the Colorado River Water Quality <br /> <br />Office, Bureau of Reclamation and the USDA Salinity Control <br /> <br />Coordinating Committee, u.S. Department of Agriculture. <br /> <br />~~gi!~Iigi_~g~_~~~l~~!iO~ - The objectives of the <br />monitoring and evaluation (M&E) program are to: 1) develop <br /> <br />information about actual onfarm effects, 2) enable USDA to <br /> <br />confirm or correct data used to plan salinity control <br /> <br />projects, and 3) collect data to evaluate the overall <br /> <br />effectiveness and efficiency of USDA salinity control <br /> <br />activities. <br /> <br />Although hampered by a shortage of staff and funding, <br /> <br />USDA moved ahead during 1986. <br /> <br />In the Grand Valley Unit, <br /> <br />Colorado, 16 automated irrigation M&E sites are now <br /> <br />operational, and full-season irr igation data have been <br /> <br />collected on 13 fields. Development of the software to <br /> <br />process M&E data proved to be a much larger task than <br /> <br />initially estimated, but significant progress was made in <br /> <br />1986 toward developing needed software. <br /> <br />The first full <br /> <br />season of data was collected during the 1985 irrigation <br /> <br />season. <br /> <br />In the Uinta Basin Unit, ground water tubes were <br /> <br />installed on 15 farms to facilitate monitoring ground water <br /> <br />levels using neutron probes. <br /> <br />Water inflow and outflow <br /> <br />measurements on these farms will be combined with data from <br /> <br />six potential evapotranspiration sites to measure deep <br /> <br />percolation. <br /> <br />-21- <br /> <br />~ <br />