STREAMFLOW DEPLETION: MODELING OF REDUCED BASEFLOW ANI INDUCED STREAM INFILTRATION FROM SEASONALLY PUMPED WELLS¹

Abstract

Numerical modeling techniques are used to analyze streamflow depletion for stream-aquifer systems with baseflow.The analyses calculated two flow components generated by a pumping well located at a given distance from a river that is hydraulically connected to an unconfined aquifer. The two components are induced stream infiltration and reduced baseflow; both contribute to total streamfiow depletion. Simulation results suggest that the induced infiltration, the volume of water discharged from the stream to the aquifer, has a shorter term impact on streamfiow, while the reduced baseflow curves show a longer term effect. The peak impacts of the two hydrologic processes on streamfiow occur separately. The separate analysis helps in understanding the hydrologic interactions between stream and aquifer. Practically, it provides useful information about contaminant transport from stream to aquifer when water quality is a concern, and for areas where water quantity is an issue, the separate analysis offers additional information to the development of water resource management plan. (KEY TERMS: modeling; streamfiow depletion; reduced baseflow; stream infiltration; anisotropic aquifer; baseflow.)

Streamflow depletion by wells--Understanding and managing the effects of groundwater pumping on streamflow

“…Pumping rates from these aquifers are largest during the irrigation season but then decrease sharply during the remainder of the year. The effect of cyclic pumping on streamflow depletion has been the subject of much research, and the remaining discussion draws on contributions by Jenkins (1968a), Wallace and others (1990), Darama (2001), Chen and Yin (2001), Kendy and Bredehoeft (2006), Bredehoeft and Kendy (2008), and Bredehoeft (2011a). An example of the effects of cyclic pumping at a hypothetical agricultural supply well placed at various distances from a stream is described here and is similar to examples of cyclic pumping provided by Bredehoeft and Kendy (2008) and Bredehoeft (2011a).…”

A combined-water-system approach for tackling water scarcity: application to the Permilovo groundwater basin, Russia

“…Langhoff et al 2006;Rodriguez et al 2006;Wang et al 2015;Woessner 2000;Zume and Tarhule 2008) as well as for seasonal pumping (Bredehoeft and Kendy 2008;Chen and Yin 2001;Chen and Shu 2002;Kendy and Bredehoeft 2006). Conrad and Beljin (1996) and Sophocleous et al (1995) compared the results of the analytical solution and a numerical model and showed some significant departures for situations that deviate from the assumptions.…”

“…In these conditions, the stream depletion values and timing of the stream reduction, which are created by short-term pumping, are controlled by the following parameters: the hydraulic conductivity and specific yield of the aquifer; the stream leakage coefficient; the distance between the CW and the stream edge; and the pumping rate and period. The different sets of parameters affecting stream depletion, caused by short-term pumping, were investigated in several studies (Bredehoeft and Kendy 2008;Chen and Yin 2001;Chen and Shu 2002;Filimonova and Shtengelov 2013;Kendy and Bredehoeft 2006). In this study the compensation pumping rate and period were assigned according to the duration of low-water period and necessary reduction of the MW pumping rate.…”

Modelling the response of an alluvial aquifer to anthropogenic and recharge stresses in the United States Southern Great Plains

“…In alluvial plains, streamflow depletion can result from aquifer pumping in two ways: (1) when pumping reduces baseflow contribution to streams, and (2) when pumping creates cones of depression around wells that expand to the stream and induce stream water loss into the aquifer (referred to here as 'stream leakage'). Losses from these two sources constitute total stream depletion (Chen and Yin 2001;Chen 2003). To isolate the impacts of pumping on stream-aquifer interaction, a transient model was first run with no pumping introduced (figure 6a).…”