Long‐term groundwater storage trends estimated from streamflow records: Climatic perspective

[1] Base flow, also known as low flow or drought flow, in a natural river system originates mainly from drainage of the riparian aquifers in the upstream basin. Base flow data can therefore provide a quantitative estimate of the basin-scale groundwater storage changes that have taken place over the period of record. The concept was implemented and validated with data from two large river basins in Illinois. On average over the past 2/3 century, shallow groundwater storage in Illinois, derived from the drought flows, has been increasing at an average rate of around 0.05 to 0.10 mm a-1. However, the trend has not been stationary throughout this period; for instance, the more recent trend from the mid nineteen nineties until now appears to have been negative. The groundwater storage changes inferred from the base flows are generally consistent with the average groundwater level changes measured in an observation well network over the same area.

[1]  F. R. Hall.  Base‐Flow Recessions—A Review , 1968 .

[2]  Wilfried Brutsaert,et al.  Is Mongolia's groundwater increasing or decreasing? The case of the Kherlen River basin / Les eaux souterraines de Mongolie s'accroissent ou décroissent-elles? Cas du bassin versant la Rivière Kherlen , 2008 .

[3]  Wilfried Brutsaert,et al.  Basin‐scale geohydrologic drought flow features of riparian aquifers in the Southern Great Plains , 1998 .

[4]  M. Morisawa.  Quantitative Geomorphology of Some Watersheds in the Appalachian Plateau , 1962 .

[5]  Bertram S. Barnes.  The structure of discharge-recession curves , 1939 .

[6]  Bertram S. Barnes.  Consistency in Unitgraphs , 1959 .

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

[8]  J. Arnold,et al.  HYDROLOGICAL MODELING OF THE IROQUOIS RIVER WATERSHED USING HSPF AND SWAT 1 , 2005 .

[9]  Sonia I. Seneviratne,et al.  Inferring changes in terrestrial water storage using ERA-40 reanalysis data: The Mississippi River Basin , 2004 .

[10]  T. McMahon,et al.  Evaluation of automated techniques for base flow and recession analyses , 1990 .

[11]  John S. Selker,et al.  On the use of the Boussinesq equation for interpreting recession hydrographs from sloping aquifers , 2006 .

[12]  Maritan,et al.  Scaling laws for river networks. , 1996, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[13]  John L. Nieber,et al.  Regionalized drought flow hydrographs from a mature glaciated plateau , 1977 .

[14]  A. Robock,et al.  The Global Soil Moisture Data Bank , 2000 .

[15]  Wilfried Brutsaert,et al.  Hydrology: An Introduction , 2005 .

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