ARCHIVED CONTENT: In December 2020, the CZO program was succeeded by the Critical Zone Collaborative Network (CZ Net) ×
Christina CZO was active 2009-2013 ×


Two-dimensional finite element model for hillslope DOC
Physically based model of water, heat, refractory DOC and biodegradable DOC transport on a 2D (vertical cross section) hillslope

Fluid exchange model

Dynamic response of surface water-groundwater exchange to currents, tides, and waves in an estuary
Changes in fluid flux across the sediment-water interface in a shallow estuary due to changes in currents, waves, and tides


Integrated one dimensional physically-based dissolved organic carbon model
A one-dimensional transport model for heat, and biodegradeable and refractory dissolved organic carbon in soils


Penn State Integrated Hydrologic Model
Multiprocess, multi-scale hydrologic model.


Penn State Integrated Hydrological Model for Dissolved Organic Carbon
PIHM is a physically based, fully distributed hydrological model

Preferential Flow

Hydrologic Flowpaths and Hydropedology
Vertical and lateral flowpaths provide a "short-circuit" for water flux in the shallow subsurface.

Saprolite to Sea

Whole Watershed “Saprolite to Sea” Synthesis
Watershed Integration of Erosion-Driven Carbon Sequestration