2011-03-30_REPORT - C1980005 - Laserfiche WebLink

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• DISCUSSION Climatic Conditions The year preceding sampling in July 2010 included well below average moisture from late summer of 2009 to early spring of 2010. This dry sequence was ended by a two month `spike' of precipitation in April and May 2010 (Figures 4a and 4b). When compared to other years in which monitoring has occurred back to 1987, the cumulative 12 months total precipitation prior to sampling ranked 2010 as the second lowest for the 24 years of record (Figure 5b). However, total precipitation for the previous six months was slightly above average for the period of record back to 1987 (Figure 6b). The cumulative four month precipitation values back to 1987 (Figure 7b) show that 2010 was also above the 24-year average. With regard to temperature, cumulative January through June 2010 warmth was well below average, the fourth coldest recorded in the past 25 years (Figure 8). Sample Adequacy Calculations Sample adequacy of allowable herbaceous cover was achieved in each of the two reference areas as well as the Phase II bond release block (see below and Table 7). Summaries of the • allowable herbaceous calculations for each area as they were needed for sample adequacy calculation are as follows: MOUNTAIN BRUSH REFERENCE AREA (TABLES 6-2 AND 6-4. APPENDIX 6) ANNUAL DEDUCTION CALCULATION: Total First Hit Vegetation Cover 71.50 Noxious Weed Cover - 0.33 • Total Minus Noxious 71.17 Allowable Annual Cover Limit X 0.1 Allowable Annual Cover 7.12 Actual Annual Cover (w/o noxious annuals) - 0.87 Non-allowable Annual Cover (zero in calculations below if positive) 6.2 ALLOWABLE FIRST HIT COVER CALCULATION Total First Hit Vegetation Cover 71.50 Noxious Weed Cover - 0.33 Total Minus Noxious 71.17 Excess Non-allowable Annual Cover Deduction - 0.0 Woody Plants - Not Allowed - 58.40 Mean Allowable Cover 12.77 10