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<br /> <br /> <br />I. HYDROLOGIC MONITORING SYSTEM <br />Page 1 <br />The system was unchanged from 1982. That is, all of the established <br />stations were continued. The stream gauging stations on Trout Creek and <br />Oak Creek were operated during the ice free period from May to November. <br />Unusual peak flows again destroyed the flume in the ephemeral drainage <br />between West Ridge and Center Ridge and no records could be salvaged. <br />Water quality samples were collected from all of the approved surface and <br />ground water monitoring stations. <br />II. FLOi~! RECORDS <br />Streamflow and irrigation ditch flow records for 1983 are included in <br />Appendix 1. As noted for 1982, the rating curves on TR-a and TR-b were <br />checked using periodic stream flow measurements during the recession and <br />base flow periods. The rating curves are adjusted for 1983 to match these <br />measurements. Based on these revised curves, the reported flows from <br />August through November are fair to good in accuracy. The peak flows <br />records (May through July) are not as good. The channel at TR-b is going <br />through enough of a change to make any of the high flow values questionable <br />and it appears that the cutting and filling that occurred may have <br />interfered with communication between the stream and the stilling well for <br />short periods. Debris that caught on the staff gauge at TR-a eventually <br />bent the gauge over. The gauge was replaced and resurveyed to establish <br />the gauge shift between the old and new sites. Unfortunately, this means <br />that communication between the stilling well and stream could not be <br />checked during the high flows in June and July. However, the bed at TR-a <br />appears stable so there is little likelihood that there was very much <br /> <br />