Pitt | Swanson Engineering
Liang, Xu
Civil & Environmental Engr
Liang, Xu
Faculty
Professor
Office: Benedum 728
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PhD in Hydrology and Water Resources, University of Washington, 1994

Postdoctoral Training in Postdoctoral Researcher/Research Associate,, Princeton University, 1994-1996

applications of emerging information technology for sustainable ecological system and water resources management

applications of sensors and wireless sensor network for environmental, ecological, and hydrological systems

cyber-infrastructure for earth science

data assimilation

eco-hydrology

flood and drought analysis for water resources

GIS-based modeling for non-point source pollution transport and its impacts on hydrologic and ecological systems at watershed scales

hydro-informatics with machine learning methods

impacts of climate change on diseases re-occurrences and re-distributions, and on sustainable water resources and environment

improving accuracies on weather forecasts, droughts and floods, and on climate studies

land surface modeling

scaling and data assimilation using in situ and remotely sensed measurements

surface water and groundwater interactions and their feedback impacts to climatic and hydrological studies

to discover and reveal fundamental laws that govern water and energy cycles

(2009) Chang Jiang Chair Professor , China's Ministry of Education and Hongkong Li Ka-Shing Foundation.

(2009) T. Davis, a Ph.D. student under Liang's supervision, received the AGU (American Geophysical Union) Outstanding Student Paper Award in 2009 at the AGU Joint Assembly - The Meeting of the Americas, Toronto, Canada.

(2003) Award certificate for "the creative development of technically significant software" entitled "MODIS Atmosphere Level-3 Algorithm Software - Level 3 Atmosphere 8-day, CMG", NASA.

(2003) Award certificate for "the creative development of technically significant software" entitled "MODIS Atmosphere Level-3 Algorithm Software - Level 3 Atmosphere Monthly, CMG", NASA.

(2002) L. Parada and M. Huang, two Ph.D. students under Liang's supervision, received the Student Research Award from the Berkeley Atmospheric Sciences Center in 2002, 2003, and 2004, respectively..

(2000) Hellman Foundation Junior Faculty Award for Excellence in Research, University of California at Berkeley.

Liang, X., and Salas, D., 2012, "An introduction to multiscale Kalman smoother-based framework and its application to data assimilation," in Land Surface Observation, Modeling and Data Assimilation, X. Li, S. Liang, J. Shi, and X. Xie, eds..

Liang, X., Davis, T., Navarro, M., Bhatnagar, D., and Liang, Y., 2012, "An Experimental Study of WSN Power Efficiency: MICAz networks with XMesh," International Journal of Distributed Sensor Networks.

Liang, X., Davis, T.W., Kuo, C.M., and Yu, P.S., 2012, "Sap flow sensors: construction, quality control and comparison," Sensors, pp. 954-971.

Liang, X., Davis, T.W., Liang, Y., and Kuo, C.M., 2012, "Analysis of power characteristics for sap flow, soil moisture and soil water potential sensors in wireless sensor networking systems," IEEE Sensors Journal, vol.12, no.6, pp. 1933-1945.

Liang, X., Salas, D., and Liang, Y., 2012, "A systematic approach for hydrological model couplings," Int. J. Communications, Network and System Sciences, vol.5, pp. 343-352.

Wen, Z., Yang, S., and Liang, X., 2012, "A new multiscale routing framework and its evaluation for land surface modeling applications," Water Resour. Res.

Liang, X., Ferguson, I.M., Duffy, P.B., Phillips, T.J., Dracup, J.A., Schubert, S., and Pegion, P., 2011, "Non-stationarity of the signal and noise characteristics of seasonal precipitation anomalies," Climate Dynamics, vol.36, no.3-4, pp. 739-752.

Liang, X., Leung, L.R., Huang, M., and Qian, Y., 2011, "Climate-Soil-Vegetation control on groundwater table dynamics and its feedbacks in a climate model," Climate Dynamics, vol.36, no.1-2, pp. 57-81.

Liang, X., Wang, S., and Nan, Z., 2011, "How much improvement can precipitation data fusion achieve with a Multiscale Kalman Smoother-based framework?," Water Resour. Res..

Liang, X., Xu, W., and Niu, Z., 2011, "Experimental investigation of the scouring of quake dams during dam-break," J. of Earthquake and Tsunami, pp. 429-444.

Liang, X., and Parada, L.M., 2010, "A novel approach to infer streamflow signals for ungauged basins," Advances in Water Resources, vol.33, pp. 372-386.

Liang, X., Nan, Z., Wang, S., Adams, T., Teng, W., and Liang, Y., 2010, "Analysis of spatial similarities between NEXRAD Stage III and LDAS Combo precipitation data products," IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol.3, no.3, pp. 371-385.

Liang, X., Ravindran, N., and Liang, Y., 2010, "A labeled-tree approach to semantic and structural data interoperability applied in hydrology domain," Information Sciences, vol.180, pp. 5008-5028.

Liang, X., 2008, "Chapter 3: Land surface modeling," in Advances in Earth Sciences - Environmental Geosciences, X. Feng, and C. Zheng, eds., Higher Education Press, pp. 49-67.

Liang, X., and Parada, L.M., 2008, "Impacts of spatial resolutions and data quality on soil moisture data assimilation," J. Geophys. Res, vol.113.

Liang, X., Huang, M., and Leung, L.R., 2008, "A generalized subsurface flow parameterization considering subgrid spatial variability of recharge and topography," J. Hydrometeorology, vol.9, pp. 1151-1171.

Liang, X., 2006, "PUB Working Group on orographic precipitation, surface and groundwater interactions, and their impacts on water resources."

Liang, X., and Duan, Q., 2006, "Model Parameter Estimation Experiment (MOPEX): An overview of science strategy and major results from the second and third workshops," J. Hydrol, vol.320, pp. 3-17.

Liang, X., and Huang, M., 2006, "On the assessment of the impact of reducing parameters and identification of parameter uncertainties for a hydrologic model with applications to ungauged basins," J. Hydrol, vol.320, pp. 37-61.

Liang, X., and Liang, Y., 2006, "Improving signal prediction performance of neural networks through multiresolution learning approach," IEEE Transactions on Systems, Man and Cybernetics - Part B, vol.36, no.2, pp. 341-352.

Liang, X., Jeong, S., and Liang, Y., 2006, "Design of an integrated data retrieval, analysis, and visualization system: Application in the hydrology domain," Environmental Modelling & Software, vol.21, no.12, pp. 1722-1740.

Liang, X., Jeong, S., and Liang, Y., 2006, "Integrated data management system," in Hydro-Informatics: Data integrative approaches in computation, analysis, and modeling, CRC Press, pp. 227-256.

Liang, X., 2005, "Land surface modeling," in The Encyclopedia of Water, John Wiley & Sons.

Liang, X., and Parada, L.M., 2004, "Optimal multiscale Kalman filter for assimilation of near-surface soil moisture into land surface models," J. Geophys. Res., vol.109, no.D24.

Liang, X., and Wagener, T., 2004, "Predictions in ungauged basins as a catalyst for multidisciplinary hydrology."

Liang, X., Guo, J., and Leung, L.R., 2004, "A new multi-scale flow network generation scheme for land surface models," Geophys. Res. Letters, vol.31.

Liang, X., Guo, J., and Leung, L.R., 2004, "Assessment of the effects of spatial resolutions on daily water flux simulations," J. Hydrol, vol.298, pp. 287-310.

Liang, X., Guo, J., and Leung, L.R., 2004, "Impacts of different precipitation data sources on water budgets," J. Hydrol, vol.298, pp. 311-334.

Liang, X., Xie, Z., and Yang, H., 2004, "A moving boundary problem and its applications to land-atmosphere interactions, in Advances in Scientific Computing and Applications."

Liang, X., Yuan, F., Xie, Z.H., Liu, Q., Yang, H.W., Su, F.G., and Reb, L.L., 2004, "An application of the VIC-3L land surface model and remote sensing data in simulating streamflow for the Hanjiang River basin," vol.30, no.5, pp. 680-690.

Liang, X., Zhou, S., Chen, J., and Gong, P., 2004, "An assessment of the VIC-3L hydrological model for the Yangtze River basin based on remote sensing: a case study of the Baohe River basin," Canadian Journal of Remote Sensing, vol.30, no.5, pp. 840-853.

Liang, X., and Guo, J., 2003, "Intercomparison of land surface parameterization schemes: Sensitivity of surface energy and water fluxes to model parameters," J. Hydrol, vol.279, pp. 182-209.

Liang, X., and Parada, L.M., 2003, "A downscaling framework for L band radiobrightness temperature imagery," J. Geophys. Res., vol.108, no.D22, p. 8863.

Liang, X., and Parada, L.M., 2003, "A stochastic modeling approach for characterizing the spatial structure of L band radiobrightness temperature imagery," J. Geophys. Res., vol.108, no.D22, p. 8862.

Liang, X., and Xie, Z., 2003, "Important factors in land-atmosphere interactions: Surface runoff generations and interactions between surface and groundwater," Global & Planetary Change, vol.38, no.1-2, pp. 101-114.

Liang, X., Huang, M., and Liang, Y., 2003, "A transferability study of model parameters for the variable infiltration capacity land surface scheme," J. Geophys. Res., vol.108, no.D22, p. 8864.

Liang, X., Parada, L.M., and Fram, J.P., 2003, "Multi-resolution calibration methodology for hydrologic models: Applications to a sub-humid catchment," Water Science and Application Series, 6, American Geophy. Union, pp. 197-211.

Liang, X., Sivapalan, M., Takeuchi, K., Franks, S.W., Gupta, V.K., Karambiri, H., Lakshmi, V., McDonnell, J.J., Mendiondo, E.M., O'Connell, P.E., Oki, T., Pomeroy, J.W., Schertzer, D., Uhlenbrook, S., and Zehe, E., 2003, "IAHS decade on Predictions in Ungauged Basins (PUB)," Hydrological Sciences Journal, vol.48, no.6, pp. 857-880.

Liang, X., Su, F., and Xie, Z., 2003, "An application of the VIC-3L land surface model in simulating streamflow for continental-scale river basins in China."

Liang, X., Xie, Z., and Huang, M., 2003, "A new parameterization for surface and groundwater interactions and its impact on water budgets with the variable infiltration capacity (VIC) land surface model," J. Geophys. Res, vol.108, no.D16, p. 8613.

Liang, X., Xie, Z.H., Su, F.G., Zeng, Q.C., Hao, Z.C., and Guo, Y.F., 2003, "Applications of a surface runoff model with Horton and Dunne runoff for VIC," Advances in atmospheric sciences, vol.20, no.2, pp. 165-172.

Liang, X., and Liang, Y., 2001, "Applications of data mining in hydrology."

Liang, X., and Xie, Z., 2001, "A new surface runoff parameterization with subgrid-scale soil heterogeneity for land surface models," Advances in Water Resources, vol.24, no.9-10, pp. 1173-1193.

Liang, X., Wood, E.F., and Lettenmaier, D.P., 2001, "Modeling Ground Heat Flux in Land Surface Parameterization Schemes."

Liang, X., Abdulla, F.A., and Lettenmaier, D.P., 1999, "Estimation of the ARNO model baseflow parameters using daily streamflow data," J. Hydrol, vol.222, no.1-4, pp. 37-54.

Liang, X., and Pitman, A.J., 1999, "Key results and implications from phase 1(c) of the Project for Intercomparison of Land-surface Parameterization Schemes," Clim. Dynamics, vol.15, no.9, pp. 673-684.

Liang, X., Wood, E.F., and Lettenmaier, D.P., 1999, "Modeling ground heat flux in land surface parameterization schemes," J. Geophys. Res, vol.104, no.D8, pp. 9581-9600.

Liang, X., and Qu, W., 1998, "Sensitivity of latent heat flux from PILPS land-surface schemes to perturbations of surface air temperature," J. Atmos. Sci, vol.55, no.11, pp. 1909-1927.

Liang, X., Lohmann, D., and Lettenmaier, D.P., 1998, "The project for intercomparison of land-surface parameterization schemes (PILPS) phase-2c Red-Arkansas river basin experiment: 3. Spatial and temporal analysis of water fluxes," Global and Planetary Change, vol.19, no.1-4, pp. 161-179.

Liang, X., Peters-Lidard, C.D., Blackburn, E., and Wood, E.F., 1998, "The effect of soil thermal conductivity parameterization on surface energy fluxes and temperatures," J. Atmos. Sci., vol.55, no.7, pp. 1209-1224.

Liang, X., Wood, E.F., and Lettnemaier, D.P., 1998, "The project for intercomparison of land-surface parameterization schemes (PILPS) phase-2c Red-Arkansas river basin experiment: 2. Spatial and temporal analysis of energy fluxes," Global and Planetary Change, vol.19, no.1-4, pp. 137-159.

Liang, X., Wood, E.F., Lettenmaier, D.P., Lohmann, D., and Boone, A., 1998, "The project for intercomparison of land-surface parameterization schemes (PILPS) phase-2c Red-Arkansas river basin experiment: 1. Experiment description and summary intercomparisons," Global and Planetary Change, vol.19, no.1-4, pp. 115-135.

Liang, X., and Chen, T.H., 1997, "Cabauw experimental results from the project for intercomparison of land-surface parameterization schemes," J. Clim, vol.10, no.6, pp. 1194-1215.

Liang, X., Nijssen, B., Lettenmaier, D.P., Wetzel, S., and Wood, E.F., 1997, "Streamflow simulation for continental-scale river basins," Water Resour. Res, vol.33, no.4, pp. 711-724.

Liang, X., Wood, E.F., Lettenmaier, D.P., Nijssen, B., and Wetzel, S.W., 1997, "Hydrological modeling of continental-scale basins," Annu. Rev. Earth Planet. Sci, vol.25, pp. 279-300.

Liang, X., Lettenmaier, D.P., and Wood, E.F., 1996, "A one-dimensional statistical dynamic representation of subgrid spatial variability of precipitation in the two-layer variable infiltration capacity model," J. Geophys. Res, vol.101, no.D16, pp. 403-422.

Liang, X., Wetzel, P.J., Irannejad, P., Boone, A., Nolhan, J., Shao, Y., Skelly, C., Xue, Y., and Yang, Z., 1996, "Modeling vadose zone liquid water fluxes: Infiltration, runoff, drainage, interflow," Global and Planetary Change, vol.13, no.1-4, pp. 57-71.

Liang, X., Wood, E.F., and Lettenmaier, D.P., 1996, "Surface soil moisture parameterization of the VIC-2L model: Evaluation and modifications," Global and Planetary Change, vol.13, no.1-4, pp. 195-206.

Liang, X., Lettenmaier, D.P., Wood, E.F., and Burges, S.J., 1994, "A simple hydrologically based model of land surface water and energy fluxes for general circulation models," J. Geophys. Res, vol.99, no.D7, pp. 415-428.

Liang, X., Jackson, C.R., Burges, S.J., and Leytham, K.M., "Development and application of simplified continuous hydrologic modeling for drainage design and analysis."