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 Wind Erosion and Water Conservation Research: Lubbock, TX
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ARS Home Plains Area Lubbock, Texas Cropping Systems Research Laboratory Wind Erosion and Water Conservation Research Research Publications at this Location





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Title:   Author  item
                                            RAINWATER, KEN - TTUitem
                                            Gitz, Dennisitem
                                            Stout, Johnitem
                                            SMITH, LOREN - TTUitem
                                            ZARTMAN, RICHARD - TTU
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 7/18/2006
                                    Publication  Date: 7/20/2006
                                    Citation: Rainwater, K., Gitz, D.C., Stout, J.E., Smith, L., Zartman, R. 2006. Estimating aquifer recharge through playas of the great plains using temperature probes. Annual Conference of Universities Council on Water Resources/National Institute for Water Resources.Interpretive Summary:
                                Technical Abstract: The magnitude of recharge through playa wetlands in the High Plains has often been debated, but rarely been quantified.  The ephemeral nature of playas makes it difficult and expensive to observe the filling and drying/draining cycles. Rugged, inexpensive tools to demonstrate the movement of water below the root zone area are needed to observe the recharge process.  We performed “proof of concept” studies to evaluate temperature as an indicator of infiltration/recharge in playa wetlands. Single-ringed infiltrometers with embedded Cu-constantan thermocouples and Hobo probes at 50, 100, 150 and 200 cm soil depths were used to quantify infiltration and temperature.   At two playas, one infiltrometer was installed in a clay-textured soil, characteristic of the playa bottom, and one was installed in coarse-textured soil adjacent to the playa.  After filling the infiltrometers, we assumed differences in soil temperature over time would be caused by the infiltrating water.  At least of 70 cm of water was pumped into each infiltrometer at approximately 1.3 cm/min. Temperature differences were noted at the 50- and 100-cm depths at all locations after infiltration. The magnitude of temperature change was positively correlated with the rate of infiltration, and negatively correlated with the soil depth. These temperature readings were in good agreement with the time and quantity of water added.  This new field application has great potential to improve  the understanding and predicting the life of the High Plains aquifer.


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