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<br />HYDROSALINITY MONITORING AND EVALUATION <br /> <br />setting <br /> <br />Irrigation Delivery Systems: The irrigation systems commonly used by <br />farmers include: earth ditch to siphon tubes, concrete ditch to gated <br />pipe, ported concrete ditch, underground pipeline to gated pipe as well <br />as various kinds of sprinkler systems. These may be drip, microspray, <br />solid set sprinkler or sideroll sprinkler. <br /> <br />Monitoring site Description <br /> <br />On-farm irrigation monitoring began in 1984 with the installation of 12 <br />monitoring sites. In 1995, eight sites were monitored. <br />Table 1 provides information on the status of various sites established <br />since 1985. An annual summary of data from 1986 to the present is <br />available upon request from the Natural Resources Conservation Service. <br /> <br />The initial goal was to monitor 35 sites annually as outlined in the <br />1983 Grand Valley Monitoring and Evaluation Plan. Since then, it has <br />been decided that at least eight active monitoring sites would be <br />maintained this year. A total of 35 sites could be monitored over the <br />life of the M&E Program by maintaining over 12 operating sites each year <br />and rotating the equipment to new fields after three to five years of <br />irrigation monitoring. <br /> <br />4 <br />