Geophysical Investigation of the Effect of Aspect and Elevation of Critical Zone Architecture in the Reynolds Creek Critical Zone Observatory
In snow dominated mountainous watersheds it is commonly observed that the northerly facing slopes are more deeply weathered than the southerly facing slopes.Johnston Draw is an east draining catchment within the Reynolds Creek Critical Zone Observatory that spans a 300m elevation gradient.We hypothesize that the largest difference in weathering depth between the north and south aspects will occur where the difference in snow accumulation between the aspects is also greatest.In order to test this hypothesis, we conducted four seismic refraction tomography surveys within Johnston Draw from inlet to outlet and perpendicular to drainage direction.From these measurements, we calculate the weathering zone thickness from the P-wave velocity profiles.We conclude that the maximum difference in weathering between aspects occurs 3/4 of the way up the drainage from the outlet where the difference in snow accumulation is highest.This supports the hypothesis that deeper snow accumulation leads to deeper weathering when all other variables are held equal.
Critical Zone Seismic Refraction Tomography Weathering Depth
Travis Nielson John H.Bradford W.Stephen Holbrook
Boise State University Colorado School of Mines Virginia Tech
国际会议
杭州
英文
2-7
2018-06-10（万方平台首次上网日期，不代表论文的发表时间）