Representation of Water Table Dynamics in a Land Surface Scheme. Part I: Model Development

Most of the current land surface parameterization schemes lack any representation of regional groundwater aquifers. Such a simplified representation of subsurface hydrological processes would result in significant errors in the predicted land surface states and fluxes especially for the shallow water table areas in humid regions. This study attempts to address this deficiency. To incorporate the water table dynamics into a land surface scheme, a lumped unconfined aquifer model is developed to represent the regional unconfined aquifer as a nonlinear reservoir, in which the aquifer simultaneously receives the recharge from the overlying soils and discharges runoff into streams. The aquifer model is linked to the soil model in the land surface scheme [Land Surface Transfer Scheme (LSX)] through the soil drainage flux. The total thickness of the unsaturated zone varies in response to the water table fluctuations, thereby interactively coupling the aquifer model with the soil model. The coupled model (called LSXGW) has been tested in Illinois for an 11-yr period from 1984 to 1994. The results show reasonable agreements with the observations. However, there are still secondary biases in the LSXGW simulation partially resulting from not accounting for the spatial variability of water table depth. The issue of subgrid variability of water table depth will be addressed in a companion paper.

[1]  S. Manabe,et al.  Summer dryness due to an increase of atmospheric CO2 concentration , 1981 .

[2]  Cynthia Rosenzweig,et al.  Potential evapotranspiration and the likelihood of future drought , 1990 .

[3]  R. Bras,et al.  A Description of Rainfall Interception over Large Areas. , 1993 .

[4]  C. Delire,et al.  Evaluating the performance of a land Surface / ecosystem model with biophysical measurements from contrasting environments , 1999 .

[5]  Thomas C. Winter,et al.  Putting aquifers into atmospheric simulation models: an example from the Mill Creek Watershed, northeastern Kansas , 2002 .

[6]  E. Eltahir,et al.  On the asymmetric response of aquifer water level to floods and droughts in Illinois , 1999 .

[7]  R. Dickinson,et al.  The Project for Intercomparison of Land Surface Parameterization Schemes (PILPS): Phases 2 and 3 , 1993 .

[8]  W. Nichols.  Estimating discharge of shallow groundwater by transpiration from greasewood in the Northern Great Basin , 1993 .

[9]  J. F. Daniel,et al.  Estimating groundwater evapotranspiration from streamflow records , 1976 .

[10]  Eric F. Wood,et al.  A land-surface hydrology parameterization with subgrid variability for general circulation models , 1992 .

[11]  D. Verseghy,et al.  CLASS-A Canadian Land Surface Scheme for GCMs , 1993 .

[12]  H. Tschinkel.  Short‐term fluctuation in streamflow as related to evaporation and transpiration , 1963 .

[13]  E. Eltahir,et al.  Representation of Water Table Dynamics in a Land Surface Scheme. Part II: Subgrid Variability , 2005 .

[14]  W. Brutsaert,et al.  Recession characteristics of groundwater outflow and base flow from mountainous watersheds , 1988 .

[15]  J. Philip,et al.  The Theory of Infiltration , 1958 .

[16]  Jack Kornfield,et al.  A Comparative Study of the Effects of Albedo Change on Drought in Semi-Arid Regions. , 1977 .

[17]  Zong-Liang Yang,et al.  The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) Phase 2(c) Red–Arkansas River basin experiment:: 1. Experiment description and summary intercomparisons , 1998 .

[18]  Zhenghui Xie,et al.  A new parameterization for surface and groundwater interactions and its impact on water budgets with the variable infiltration capacity (VIC) land surface model , 2003 .

[19]  Zong-Liang Yang,et al.  The Project for Intercomparison of Land Surface Parameterization Schemes (PILPS): Phases 2 and 3 , 1993 .

[20]  D. L. Brakensiek,et al.  Estimation of Soil Water Properties , 1982 .

[21]  A. Dalcher,et al.  A Simple Biosphere Model (SIB) for Use within General Circulation Models , 1986 .

[22]  Scott A. Isard,et al.  A Soil Moisture Climatology of Illinois , 1994 .

[23]  C. Rosenzweig,et al.  Improved Ground Hydrology Calculations for Global Climate Models (GCMs): Soil Water Movement and Evapotranspiration , 1988 .

[24]  J. Shukla,et al.  Influence of Land-Surface Evapotranspiration on the Earth's Climate , 1982, Science.

[25]  Aaron Boone,et al.  Issues related to low resolution modeling of soil moisture: experience with the PLACE model , 1996 .

[26]  I. C. Prentice,et al.  An integrated biosphere model of land surface processes , 1996 .

[27]  Syukuro Manabe,et al.  The influence of potential evaporation on the variabilities of simulated soil wetness and climate , 1988 .

[28]  Pat Jen-Feng Yeh,et al.  Representation of water table dynamics in a land surface scheme : observations, models, and analyses , 2003 .

[29]  D. Pollard,et al.  A Global Climate Model (GENESIS) with a Land-Surface Transfer Scheme (LSX). Part I: Present Climate Simulation. , 1995 .

[30]  A. Robock,et al.  Satellite remote sensing of soil moisture in Illinois, United States , 1999 .

[31]  Zhenghui Xie,et al.  A new surface runoff parameterization with subgrid-scale soil heterogeneity for land surface models , 2001 .

[32]  J. Philip,et al.  Theory of Infiltration , 1969 .

[33]  David Pollard,et al.  Use of a land-surface-transfer scheme (LSX) in a global climate model: the response to doubling stomatal resistance , 1995 .

[34]  W. D. Nichols,et al.  Groundwater discharge by phreatophyte shrubs in the Great Basin as related to depth to groundwater , 1994 .

[35]  Elfatih A. B. Eltahir,et al.  Hydroclimatology of Illinois: A comparison of monthly evaporation estimates based on atmospheric water balance and soil water balance , 1998 .

[36]  Eric F. Wood,et al.  One-dimensional statistical dynamic representation of subgrid spatial variability of precipitation in the two-layer variable infiltration capacity model , 1996 .

[37]  D. L. Peck,et al.  Specific Yield Compilation of Specific Yields for Various Materials , 1967 .

[38]  D. Lettenmaier,et al.  A simple hydrologically based model of land surface water and energy fluxes for general circulation models , 1994 .

[39]  Syukuro Manabe,et al.  The mechanisms of summer dryness induced by greenhouse warming , 1995 .

[40]  Ann Henderson-Sellers,et al.  Biosphere-atmosphere transfer scheme(BATS) version 1e as coupled to the NCAR community climate model , 1993 .

[41]  Hugo A. Loáiciga,et al.  Groundwater fluxes in the global hydrologic cycle: past, present and future , 1993 .

[42]  D. Verseghy,et al.  Class—A Canadian land surface scheme for GCMS. I. Soil model , 2007 .