About

Hello, this is Xuehang, an Earth Scientist at Pacific Northwest National Laboratory in the desert of southeastern Washington State. I received my bachelor and PhD degree in Hydrology & Water Resources Engineering from Wuhan University, China. After spending one year as a postdoc in the Department of Scientific Computing at Florida State University, I joined PNNL as a postdoc and later a staff scientist. You can find my CV here.

Research Interests

Most of my research work focus on developing our understanding of biogeochemical reactions, energy, and mass transfer in subsurface system. I am especially interested in novel model and data integration methods to improve subsurface characterization, from which we will be able to predict, assess and ultimately design and operate environmental processes. Examples of my previous and onging research topics are:

• Quantify long-term groundwater recharge in the North China Plain (Wuhan University)
• Develop data assimilation methods to improve saturated-unsaturated flow modeling (Wuhan University)
• Develop Bayesian inversion methods for delineating facies distribution using data assimilation and indicator geostatistics (Florida State University)
• How dam operations control temperature dynamics and biogeochemical fluxes in the river corridor aquifer (PNNL)
• How river bathymetry, riverbed sediments, subsurface geological units, river stage fluctuations, channel morphology impact the residence time, biogeochemical reactions of hydrologic exchange flows between the river and river corridor aquifer (PNNL)
• Support on decision making on nuclear waste treatment in Hanford Site (PNNL)
• Advanced geophysical imaging and inversion methods (PNNL)

Specializations

• Groundwater flow and transport modeling
• High-performance computing
• Data assimilation and inverse modeling
• Geostatistics