Influence of landscape position and transient water table on soil development and carbon distribution in a steep, headwater catchment


TitleInfluence of landscape position and transient water table on soil development and carbon distribution in a steep, headwater catchment
Publication TypeJournal Article
Year of Publication2014
AuthorsBailey, SW, Brousseau, PA, McGuire, KJ, Ross, DS
JournalGeoderma
Date Published3/2014
ISSN00167061
Abstract

Upland headwater catchments, such as those in the Appalachian Mountain region, are typified by coarse textured soils, flashy hydrologic response, and low baseflow of streams, suggesting well drained soils and minimal groundwater storage. Model formulations of soil genesis, nutrient cycling, critical loads and rainfall/runoff response are typically based on vertical percolation, development of soil horizons parallel to the land surface, mineral weathering inputs limited to the rooting zone and drainage from lumped catchment reservoirs (e.g., the subsoil) as the dominant source of stream flow. However, detailed study of the hydrologic reference catchment at Hubbard Brook Experimental Forest, NH, USA shows striking spatial patterns of soil development that reflect the influence of transient water tables within the solum in nearly all landscape positions. Shallow bedrock and variably low hydraulic conductivity in the subsoil promote lateral flow and development of soil horizons along hillslope flowpaths rather than in vertical profiles. We distinguished several morphologic units based on the presence of diagnostic horizons indicative of differing patterns of podzolization and carbon storage. The distribution of soils appears to be highly dependent on local drainability and frequency and duration of transient saturation within the solum. As such, monitoring of hydropedologic groups and transient water table fluctuations may prove to be a sentinel for the effects of climate change on spatial distribution of soils and retention/release of solutes from upland catchments.

URLhttp://ac.els-cdn.com/S0016706114000858/1-s2.0-S0016706114000858-main.pdf?_tid=cb7c80a6-c18a-11e3-8ccf-00000aacb361&acdnat=1397228941_1c6e58f33190a7b24084b4191c072d80
DOI10.1016/j.geoderma.2014.02.017
Short TitleGeoderma
Status: 
Published
Attributale Grant: 
RACC
Grant Year: 
Year3