RT-Flux-PIHM

RT-Flux-PIHM Flux-PIHM is an open source watershed hydrogeochemical code that simulates the complex interactions between hydrological processes, land-surface processes, and multicomponent subsurface reactive transport (Bao et al., 2017; available from GitHub). To achieve this, RT-Flux-PIHM integrates a multicomponent reactive transport module (RT) into Flux-PIHM (Shi et al., 2013), which is the distributed hydrologic model Penn State Integrated Hydrological Model (PIHM) (Qu and Duffy, 2007) with a land-surface module adapted from the Noah Land Surface Model (LSM).

RT-Flux-PIHM simulates the hydrological and land-surface dynamics (precipitation, canopy interception, infiltration, recharge, overland flow, subsurface lateral flow, river flow, and surface energy balance) at the watershed scale using the semidiscrete finite volume method. The RT module takes the water output from Flux-PIHM and simulates multicomponent reactive transport processes for the spatiotemporal evolution of chemical species in the water phase. RT-Flux-PIHM offers physics-based modeling capabilities to integrate the vast amount of water and chemistry data that have now become available, to differentiate the relative importance of competing processes, and to test hypotheses at the interface of hydrology and geochemistry.

 

References:

Bao, C., L. Li, Y. Shi and C. Duffy (2017)  Understanding watershed hydrogeochemistry: 1. Development of RT-Flux-PIHM. Water Resources Research, 53, 2328–2345, doi:10.1002/2016WR018935.

Qu, Y., and C. J. Duffy (2007) A semidiscrete finite volume formulation for multiprocess watershed simulation. Water Resources Research, 43, W08419, doi:10.1029/2006WR005752.

Shi, Y., K. J. Davis, C. J. Duffy, and X. Yu (2013) Development of a coupled land surface hydrological model and evaluation at a Critical Zone Observatory. Journal of Hydrometeorology, 14(5): 1401-1420.