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Saumya Sarkar, Jonathan B. Butcher, Thomas E. Johnson, and Christopher M. Clark

) adapted the RHESSys code to simulate effects of GI on hydrology in small urban watersheds. We further expand those techniques, as described below. 2.2. Study areas: Archetypal urban subunits (AUSs) RHESSys simulations in this study were designed as sensitivity analyses applied to a set of archetypal urban subunits (AUSs), representative of different urban settings and GI practices. Each AUS comprises an urban block and adjacent road area (represented as 10 710 m 2 , or approximately one city block

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C. L. Tague and L. E. Band

processes in the South Platte basin. Ecol. Appl 8 : 1037 – 1051 . Beven , K. and M. Kirkby . 1979 . A physically-based variable contributing area model of basin hydrology. Hydrol. Sci. Bull 24 : 43 – 69 . Chen , J. , P. M. Rich , S. Gower , J. Norman , and S. Plummer . 1997 . Leaf area index of boreal forests: Theory, techniques, and measurements. J. Geophys. Res 102 : 29429 – 29444 . Chen , J. , J. Liu , J. Cihlar , and M. Goulden . 1999 . Daily canopy

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Gregory T. Pederson, Stephen T. Gray, Daniel B. Fagre, and Lisa J. Graumlich

collected at least two cores from each suitable live tree, and samples were obtained from remnant wood when available. A total of 243 trees (385 cores) were used in constructing the final chronologies, with records from each site encompassing between 341 and 885 yr. Numbers of trees sampled at each site ranged from a minimum of 12 to a maximum of 53 ( Table 2 ). Cores and cross sections were mounted, sanded, and cross dated following standard techniques ( Stokes and Smiley 1968 ; Fritts 1976 ; Briffa

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