Hydropedology Studies at the Shale Hills CZO: Hydropedology research being conducted at the Shale Hills CZO is multi-faced, cross-scale, and interdisciplinary. Two fundamental questions we seek to answer are:
(1) How do soil architecture and the distribution of soils over the landscape exert a first-order control on hydrologic processes (and associated biogeochemical and ecological dynamics) across spatio-temporal scales?
(2) How does landscape water (and the associated transport of energy, sediment, chemicals, and biomaterials by flowing water) influence soil genesis, evolution, variability, and functions?
We focus on interactive hydrologic and pedologic processes at the pore, pedon, hillslope, and catchment scales.
Soil Moisture Spatial-Temporal Patterns across Scales: A spatially dense network of soil hydrology monitoring has been implemented in the Shale Hills since 2004 (Fig. 1). This includes (1) a total of 106 sites (covering all soil types, topographic positions, and landform units in the catchment) where approximately weekly measurements of soil volumetric water content, matric potential, and water table are conducted manually from soil surface down to bedrock, and (2) a total of 20 stations where real-time soil moisture, matric potential, temperature, and water table are monitored automatically at 10-minutes interval. An example of soil moisture spatial pattern and its temporal stability is illustrated in Fig. 2. We continue to investigate the complex and dynamic controls of soil moisture spatial-temporal patterns (such as soil type, depth to bedrock, landform unit, topography, vegetation, and climate).
Defining and Delineating Hydropedological Functional Units: These are soil-landscapes units in the catchment that have similar soil properties and hydrologic functions. We plan to construct 3D stratified catchment to facilitate modeling and monitoring using these hydropedological functional units.
Contacts: Henry Lin (PI) email@example.com
Collaborators: Jim Doolittle, Chris Duffy, Sue Brantley, Dave Eissenstat, Lixin Jin
IML, Shale Hills, INVESTIGATOR
Temporal Dynamics of Soil Moisture Spatial Variability in the Shale Hills Critical Zone Observatory. Takagi, K. and H.S. Lin. (2011): Vadose Zone Journal 10:832-842,
Soil Moisture Response to Year-round Storm Events and Dominant Subsurface Flow Processes in a Steep Forested Catchment . Takagi, K., Lin, H.S. (2008): The 1st International Conference on Hydropedology, July 28-31, 2008, Penn State, University Park, PA.
Changing controls of soil moisture spatial organization in the Shale Hills Catchment. Takagi, K. and Lin, H.S. (2012): Geoderma 173-174:289-302,