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             xmlns:gco="http://www.isotc211.org/2005/gco"
             xmlns:xlink="http://www.w3.org/1999/xlink"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns="http://www.isotc211.org/2005/grg"
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   <name>
      <gco:CharacterString>Hydrogeologische Messgrößen</gco:CharacterString>
   </name>
   <contentSummary gco:nilReason="missing"/>
   <uniformResourceIdentifier>
      <gmd:CI_OnlineResource>
         <gmd:linkage>
            <gmd:URL>https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28</gmd:URL>
         </gmd:linkage>
      </gmd:CI_OnlineResource>
   </uniformResourceIdentifier>
   <operatingLanguage>
      <RE_Locale>
         <name>
            <gco:CharacterString>german</gco:CharacterString>
         </name>
         <language>
            <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2" codeListValue="ger">ger</gmd:LanguageCode>
         </language>
         <country gco:nilReason="missing"/>
         <characterEncoding>
            <gmd:MD_CharacterSetCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml"
                                     codeListValue="utf8"/>
         </characterEncoding>
         <citation gco:nilReason="missing"/>
      </RE_Locale>
   </operatingLanguage>
   <alternativeLanguages gco:nilReason="inapplicable"/>
   <owner gco:nilReason="inapplicable"/>
   <submitter gco:nilReason="inapplicable"/>
   <containedItemClass>
      <RE_ItemClass>
         <name>
            <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
         </name>
         <technicalStandard gco:nilReason="inapplicable"/>
         <alternativeNames gco:nilReason="inapplicable"/>
         <describedItem gco:nilReason="inapplicable"/>
      </RE_ItemClass>
   </containedItemClass>
   <manager gco:nilReason="missing"/>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gs">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwasserstand</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Der Grundwasserstand wird anhand des Grundwasserspiegels als Höhet über oder unter einer waagerechten Bezugsebene angegeben.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>The groundwater level is used as the height to the reference point using the groundwater table.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gs"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/M">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwassermächtigkeit</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Lotrechter Abstand zwischen Grundwassersohle und Grundwasseroberfläche. Angabe in m.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Distance between groundwater level and aquifer base in meters.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/M"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gf">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwasserflurabstand</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Lotrechter Abstand zwischen einem Punkt an der Erdoberfläche und der Grundwasseroberfläche des ersten Grundwasserstockwerkes. Angabe in m.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Distance between ground surface and groundwater level in meters.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gf"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/vz">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>mittlere Verweilzeit des Grundwassers</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Zeitintervall, in dem sich ein Stoff im Grundwasser befindet. Angabe in Jahren.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Average amount of time groundwater stays within a specific system or aquifer, in years.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/vz"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/ma">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>maximale Abstandsgeschwindigkeit</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Die maximale Abstandsgeschwindigkeit wird als Quotient aus der Länge eines Stromlinienschnittes und dem ersten Auftretens von Tracern bei Markierungsversuchen errechnet. Angabe in m/s.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>The maximum distance velocity is calculated as the quotient of the length of a streamline section and the first occurrence of tracers in marking tests, in m/s.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/ma"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/da">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>dominierende (modale) Abstandsgeschwindigkeit</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Die dominierende Abstandsgeschwindigkeit (va dom) wird als Quotient aus der Länge eines Stromlinienschnittes und dem Auftreten des Tracermaximums errechnet. Angabe in m/s.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>The dominant distance velocity (va dom) is calculated as the quotient of the length of a streamline section and the occurrence of the tracer maximum, in m/s.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/da"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/eA">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>mediane Abstandsgeschwindigkeit</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Die mediane Abstandsgeschwindigkeit (va med) wird als Quotient aus der Länge eines Stromlinienschnittes und dem Schwerpunkt des Tracerauftretens (50% Tracerwiedererhalt) errechnet. Angabe in m/s.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>The median distance velocity (va med) is calculated as the quotient of the length of a streamline section and the center of gravity of the tracer occurrence (50% tracer recovery, in m/s.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/eA"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/Q">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwasserentnahme</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Entnahme von Grundwasser aus einem Grundwasserleiter. Angabe in  m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Abstraction of groundwater from an aquifer, in m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/Q"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/aG">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwasseraustausch mit angrenzenden Grundwasserkörpern</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Menge des Wassers das zwischen angrenzenden Grundwasserkörpern fließt. Angabe in m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Volumen of water exchanged between adjacent aquifers, in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/aG"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/go">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>Grundwasseraustausch mit oberirdischen Gewässern</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Menge des Wassers das von einem Grundwasserkörper oberirdischen Gewässern zufließt (Exfiltration) oder von diesen zusickert (Infiltration). Angabe in  m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Volume of water flowing between the aquifer to surface waters (exfiltration) or from surface waters into the aquifer (infiltration), in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/go"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/ng">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>natürliches Grundwasserdargebot</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Summe aller positiven Glieder der Wasserbilanz für einen Grundwasserabschnitt. Angabe in m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Net groundwater balance, in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/ng"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gd">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>gewinnbares Grundwasserdargebot</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Teil des Grundwasserdargebotes, das mit technischen Mitteln gewinnbar ist. Angabe in m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Proportion of groundwater that can be extracted by technical means, in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gd"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/zg">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>nutzbares Grundwasserdargebot</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Teil des Grundwasserdargebotes, welches perspektivisch gewinnbar ist. Angabe in m3/a.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Proportion of groundwater that can be extracted on a sustainable basis, in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/zg"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
   <containedItem xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gv">
      <RE_RegisterItem>
         <itemIdentifier gco:nilReason="inapplicable"/>
         <name>
            <gco:CharacterString>gespeichertes Grundwasservolumen</gco:CharacterString>
         </name>
         <status>
            <RE_ItemStatus>valid</RE_ItemStatus>
         </status>
         <definition>
            <gco:CharacterString>Wasservolumen, das zu einem bestimmten Zeitpunkt in den speichernutzbaren Hohlräumen eines Grundwasserabschnittes enthalten ist. Angabe in m3.</gco:CharacterString>
         </definition>
         <description>
            <gco:CharacterString>Volume of water stored in the aquifer at a given time, in million m3/a.</gco:CharacterString>
         </description>
         <additionInformation xlink:href="https://registry.gdi-de.org/codelist/de.sgd.hy/HYSL28/gv"/>
         <itemClass>
            <RE_ItemClass>
               <name>
                  <gco:CharacterString>CodeListValue_de.sgd.hy</gco:CharacterString>
               </name>
               <technicalStandard gco:nilReason="inapplicable"/>
               <alternativeNames gco:nilReason="inapplicable"/>
               <describedItem gco:nilReason="inapplicable"/>
            </RE_ItemClass>
         </itemClass>
      </RE_RegisterItem>
   </containedItem>
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