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      <marc:subfield code="a">En36-515/31E-PDF</marc:subfield>
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      <marc:subfield code="a">Witherspoon, D. F.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="2">
      <marc:subfield code="a">A hydrologic model of the Lake Ontario local drainage basin </marc:subfield>
      <marc:subfield code="h">[electronic resource] / </marc:subfield>
      <marc:subfield code="c">D.F. Witherspoon.</marc:subfield>
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    <marc:datafield tag="260" ind1=" " ind2=" ">
      <marc:subfield code="a">Ottawa : </marc:subfield>
      <marc:subfield code="b">Dept. of Energy, Mines and Resources, Inland Waters Branch, </marc:subfield>
      <marc:subfield code="c">1970.</marc:subfield>
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      <marc:subfield code="a">v, 12 p. : </marc:subfield>
      <marc:subfield code="b">charts.</marc:subfield>
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      <marc:subfield code="a">Technical bulletin ; </marc:subfield>
      <marc:subfield code="v">no. 31</marc:subfield>
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      <marc:subfield code="a">Digitized edition from print [produced by Environment and Climate Change Canada].</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references.</marc:subfield>
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    <marc:datafield tag="520" ind1="3" ind2=" ">
      <marc:subfield code="a">"A hydrologic model based on the water and energy balances is proposed for the Lake Ontario local drainage basin (27,100 square miles, comprising the entire local contributing area except for the lake's water surface area of 7,500 square miles); Using a hypothesis which provides estimates of the actual regional evaporation, regional moisture values are obtained which, when routed, simulate the measured monthly outflows from the land area"--Abstract.</marc:subfield>
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      <marc:subfield code="a">Mathematical models</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Environment Canada.</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Inland Waters Branch.</marc:subfield>
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    <marc:datafield tag="710" ind1="1" ind2=" ">
      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Department of Energy, Mines and Resources.</marc:subfield>
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    <marc:datafield tag="830" ind1="#" ind2="0">
      <marc:subfield code="a">Technical bulletin (Canada. Inland Waters Branch)</marc:subfield>
      <marc:subfield code="v">no. 31</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.861115</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">791 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2018/eccc/En36-515-31-eng.pdf</marc:subfield>
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