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ti Section 11 s- u.~, •, Technical Approach _ --- =-~_ .~- L" ~ ~ .e . .::... .........V:i:k 'w.v..,r.. ~...............,...-,.+, n.y:n :tWei' .. F'.I:y4 .. ..2. .n.> .... r....n. i'v'.:Y r.'.. ~.- .. ..... ......n... .. .... ... ... .. .... .. .:::~ ... ... ......~..... . This section of our propns;il duscribcs the ap. proach Greystone would use to effcuively com- plete the rcvegetation study within the required time frame, The projett has been divided into Gvc tasks. Details of our approach arc provided for each task. Task 1 - Revegetation Success Criteria Establishment Thu objective of this task is to establish success criteria for subseQtlcrittcst_pLo vn ai1Qn. Criteria will be determined for vegetalivc cover, hcrbac:cous production, woody plan cnsuy, and species diversity. Ttlese criteria will be consistent with CMLRD regulation J.15.3 and arc d~seribcd in detail in the following see110n5. ~~ Na. hiv on vrgeranan Pnunr Tom! Yrj. Calvr - ,. (1) mm( wm6cr of poiw Two rcfercncc plots were established by WFU during tilt spring and summer of 1990. One plot has a northern exposure and one has a Southern CxpOSUrC. Vegetative Cover Vegetative cover sampling will be accomplished using 0-ft long transccts and a lU-point pin frame. The pin frame will be systema[ically lopted at five points along the transcct. Consequently, cadt transcct Kill consist of 50 sample points. The wtal of 5 to 10 transccts is anticipated to be needed. Howcvcr, the actual numh~r of transect5 conductcJ will be determined by sample adcquary calculations (described below). Ground cover will be determined a[ each of the ~0 sample points on a ttansect. Cover will be classified as vegetation, litter, or rock. I~ck of cover will be classified as bare soil. Vegetation will also be classifed by species. Sampling data vrill be used to eestimate totaTiZgeriftive cover according to cqualion 1. Due to the combination of plot size (0.5 acre) and transcet length. a completely randomized sampling Strategy would not be effective. Assuming each side of the rcfercncc putts is a( least t(K) p long, we propose to randomly SCICCI t14'O UppOSIIC RIdCS Of the plot for use as baselines. Transccts will be randomly established perpendicular to these baselines. Minimum spacing between all transccts will be 2 m to avoid samplca+rca o~•crlap. Herbaceous Production w _L,~ HcrbacCOUS production will be estimated for each '~, -` rcfercncc plot 4vith the han'c>t method. A l m' ••' quadrat will he establisheU midway along each vegetative crn•cr transcct. All vcgctalion within each quadrat will be clipped as close to ground ~: Icvcl as practical and bagged by lift form. Parts of „r ~~s~ plants rooted within the quadrat but not occupying r ;1>'O the three dimensional volume of the quadrat ,1, ; ,/ (height x width x length) will not be harvested. ''' Howcvcr, plants not rooted within the quadrat but , _ ` . ' which occupy space within the rolume will be _ - hanestcd. Upon completion of field efforts, all samples will be air dried and weighed. A sample size of ten quadrats is anticipated for each rcfercncc plot. However, the actual number of transccts conducted will be determined by sample adequacy calculations (described below). If fewer than ten crn•er transect5 are conducted, quadrats unassncimed With a cover transcct will he randomly lowtcd within the pint using a random numhCrs table. Woody Plant Density i.:^~ '~"j~~ , r' :., ..-- _ - _ L4 L Woody plant density will be estimated for each reference plot with belt transccts. Each transcct will be 2 m wide by 100 ft lang. One belt transcct will be located along each cover transcct. Within