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<br />{if~ <br />o;..~'.... <br /> <br />~, <br />~ <br />qv <br />~ <br /> <br />There was some damage due to flooding; however, this damage was <br />minimal when considering the potential which existed. Spring runoff <br />was extended due at least in part to lower than normal temperatures in <br />April, May and June. Precipitation during April and May was ~48% of <br />average, then dropping drastically during June and July to 24% of <br />average. The 1993 growing season Precipitation (April-september) was <br />below average throughout theLGCU. The Cedaredge area (northern) was <br />94% of normal, Delta (middle) was 92% of normal and Montrose <br />(southern) was 90t of normal. <br />Using average monthly temperature during the growing season, weather <br />stations across the'LGCU showed cedaredge and Delta at 95% of normal, <br />and Montrose at 97% of normal. <br /> <br />4. Objectives <br /> <br />The M&E plan for the Lower Gunnison, Colorado Unit identifies the <br />objectives as follows: 1) to assess effectiveness of USDA project <br />action for reducing the salt load carried by the Uncompahgre and <br />Gunnison Rivers into the Colorado River, 2) to assess impacts of <br />project action on wetlands and other wildlife habitat values and <br />assess the effectiveness of voluntary action by landowners ,to replace <br />incidental fish and wildlife values foregone, 3) and to assess local <br />economic aspects of project implementation. ' <br /> <br />HVdrosalini tv <br /> <br />t~.:.'\ <br />. ~:'.. <br /> <br />Using estimates of deep percolation and seepage reductions from <br />irrigation improvements and translating these into salt load <br />reductions is the basis for showing project salinity impacts. To <br />obtain this information the Lower Gunnison, Colorado unit (LGCU) will <br />supplement the M&E program in the Grand Valley, Colorado Unit (GVCU). <br /> <br />A minimum of 5 hydrosalinity sites will be evaluated for collection of <br />detailed data on surface systems to identify localized effects. Data <br />collected at each site will be at the same intensity as for GVCU. <br /> <br />Weather stations are established to gather sufficient data for, , <br />calculation of evapotranspiration (ET) using the Jensen-Haise method. <br />Initial equiptment setup costs are considerably less ,for the Jensen- <br />Haise (J-H) method than for the modified Penman method. Perhaps of <br />more significance is that the J-H method is the most frequently used <br />in Colorado. So long as the wind component is not large, this method <br />can be reasonably applied to calculate reference ET (USDA, May 1991, <br />p. 28-30). <br /> <br />" <br /><, .' <br /> <br />7 <br />