Development of a Coupled Land Surface Hydrologic Model and Evaluation at a Critical Zone Observatory

• DOI: 10.1175/jhm-d-12-0145.1
• Publication Date: 2013-07-10T19:33:32Z
• Authors: Yuning Shi; Kenneth J. Davis; Christopher J. Duffy; Xuan Yu
• Keywords: Hydrological modelling; Water balance

Abstract A fully coupled land surface hydrologic model, Flux-PIHM, is developed by incorporating a scheme into the Penn State Integrated Hydrologic Model (PIHM). The adapted from Noah model. Because PIHM capable of simulating lateral water flow and deep groundwater at spatial resolutions sufficient to resolve upland stream networks, Flux-PIHM able represent heterogeneities due topography soils high resolution, including structure in link between energy balance (SEB). has been implemented Shale Hills watershed (0.08 km2) central Pennsylvania. Multistate observations discharge, table depth, soil moisture, temperature, sensible latent heat fluxes June July 2009 are used manually calibrate hourly temporal resolution. predictions 1 March December evaluated. Both SEB show good agreement with observations. Comparisons model original that inclusion complex simulation only brings slight improvement discharge predictions. adds ability does improve prediction evapotranspiration, total runoff (discharge), some peak events, especially after extended dry periods. results reveal annual average strongly correlated correlation strong for grids near stream.