Santa Rita Experimental Range
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Photo Station #033



JUN19361 JUN 1936 1

Photo Archive No. 33.1.1936.06

Perm. No. 329045. Temp. No. 2311. Photo Station #33. Water Spreading Area. Central part of large retaining area, more or less open mesquite area with fair stand of Ac and Rg. 1-22-8"-G-CP. Photo by Cribbs, S.R.E.R. 6/15/36. Compare C-39. 116. Encl #45.

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APR19371 APR 1937 1

Photo Archive No. 33.1.1937.04

Perm. No. Santa Rita C-39. Photo Sta. 33. Water Spreading Area. Central portion of large retaining area unprotected. Open mesquite stand with Rg and Ac. A fair stand of weeds on the denuded portion. 4/30/37. Retake 2311. 116. Encl #45.

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JUN19851 JUN 1985 1

Photo Archive No. 33.1.1985.06

PS 33. Azimuth 296. June 26, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery.

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NOV20001 NOV 2000 1

Photo Archive No. 33.1.2000.11

PS 33. November 21, 2000, 12:10 p.m. Facing northwest. Azimuth 296. Pasture 2N. ASA 125 Plus X film. 35mm lens focal length. Eragrostis lehmanniana dominant grass; occasional burroweed. Digitaria californica, Muhlenbergia porteri and Setaria macrostachya under larger mesquites; some Bouteloua rothrockii beyond first row of mesquites in open areas. M. McClaran.

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033_1_2007_03 MAR 2007 1

Photo Archive No. 033.1.2007.03

PS. 033. 23 March 2007. Facing northeast, Azimuth 296. Pasture 2N. Elevation 1128 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, more than 50% of burroweed dead. Prickly pear and cholla cacti. Bush muhly, Bouteloua aristidoides, and cottontop in open areas; cottontop and bush muhly under mesquite with Setaria. Cloudy conditions with light rain. Compared to 2000, less grass and burroweed, more prickly pear now. M. McClaran photographer, no assistant.

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033_1_2009_03 MAR 2009 1

Photo Archive No. 033_1_2009_03

PS. 033. 17 March 2009. Facing northeast, Azimuth 296. Pasture 2N. Elevation 1130 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, a few burroweed. Prickly pear and cholla cacti. Bush muhly, Bouteloua aristidoides, and cottontop in open areas; cottontop and bush muhly under mesquite with Setaria and Chloris. The single stem mesquite at far (west) edge of water spreading berm in 1936 photo, is still present. Compared to 2007, increase B. aristidoides and cottontop, cottontop increase especially in far left of view; now B. Rothrocki is absent; also channel in bottom right has filled with sediment and buried stem on surface in 2007. M. McClaran photographer, A. Peterson assistant.

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Last updated - August 2009
Mitchel McClaran - mcclaran@u.arizona.edu