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<br /> <br />Ground Water and Surface Water <br />A Single Resource <br /> <br />by T.e. Winter <br />J.W. Harvey <br />O.L. Franke <br />W.M. Alley <br /> <br />INTRODUCTION <br /> <br />As the Nation's concerns over water <br />resources and the environment increase, the <br />importance of considering ground water and <br />surface water as a single resource has become <br />increasingly evident. Issues related to water <br />supply, water quality, and degradation of aquatic <br />environments are reported on frequently, The <br />interaction of ground water and surface water has <br />been shown to be a significant concern in many of <br />these issues, For example, contaminated aquifers <br />that discharge to streams can result in long-term <br />contamination of surface water; conversely, <br /> <br />streams can be a major source of contamination <br />to aquifers, Surface water commonly is hydrauli- <br />cally connected to ground water, but the interac- <br />tions are difficult to observe and measure <br />and commonly have been ignored in water- <br />management considerations and policies, Many <br />natural processes and human activities affect the <br />interactions of ground water and surface water, <br />The purpose of this report is to present our current <br />understanding of these processes and activities as <br />well as limitations in our knowledge and ability to <br />characterize them, <br /> <br />J/Surface water commonly is <br />hydraulically connected to ground <br />water, but the interactions are <br />difficult to observe and measure" <br /> <br />1 <br />