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Runoff and Erosion in a Piñon–Juniper Woodland

Influence of Vegetation Patches

^a Environmental Science Group, MS J495, Los Alamos National Lab., Los Alamos, NM 87545 USA
^b Dep. of Earth Resources, Colorado State Univ., Fort Collins, CO 80523 USA
^c Inter-American Institute for Global Change Research, Av. Astronautas 1758, 12227-010, Sao Jose dos Campos, São Paulo Brazil

View larger version (53K): [in a new window]   Fig. 1 Location map of the study area

View larger version (153K): [in a new window]   Fig. 2 Photograph of experimental plots

View larger version (44K): [in a new window]   Fig. 3 Total runoff (A) and sediment yield (B) by patch location and ordered by patch type: intercanopy-bare, intercanopy-vegetated, and canopy; topographic position (upper, mid, lower) indicated for bare intercanopy patches and for lower vegetated intercanopy patches

View larger version (31K): [in a new window]   Fig. 4 (A) Total volume of precipitation and runoff by patch type and storm type in the intercanopy and (B) total sediment yield by patch type and storm type in the intercanopy. A difference in letters indicates that differences by patch type are significant (P < 0.05). IC-Bare = Intercanopy bare; IC-Veg = Intercanopy vegetated

View larger version (40K): [in a new window]   Fig. 5 Cumulative runoff from the short-slope locations (SS) and total runoff from the integrated (long-slope) locations (Int) for all storm types. The difference (Diff) between the two is our estimate of runon in the intercanopy plots

View larger version (13K): [in a new window]   Fig. 6 Runon for lower, vegetated intercanopy patches as a function of total precipitation (77 events). Runon = 0.27 + 7.9/{1 + exp[-(Precip - 20)/5.5]}; r2 = 0.90 (P < 0.001)

View larger version (36K): [in a new window]   Fig. 7 Cumulative sediment yield from the short-slope locations (SS) and total sediment yield from the integrated (long-slope) locations (Int) for all storm types. The difference (Diff) between the two is our estimate of sediment storage in the intercanopy plots