<?xml version='1.0' encoding='UTF-8'?><codeBook xmlns="ddi:codebook:2_5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="ddi:codebook:2_5 https://ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" version="2.5"><docDscr><citation><titlStmt><titl>Dataset Tereno Isotope: Delta 18O, and delta 2H values from weekly precipitation samples at the water quality station Erkensruhr 2016 - 2025</titl><IDNo agency="DOI">doi:10.26165/JUELICH-DATA/ECGW8D</IDNo></titlStmt><distStmt><distrbtr source="archive">Jülich DATA</distrbtr><distDate>2026-07-23</distDate></distStmt><verStmt source="DVN"><version date="2026-07-23" type="RELEASED">1</version></verStmt><biblCit>Andreas, Lücke; Michael, Stockinger; Heye, Bogena; Holger, Wissel; Sirgit, Kummer; Ferdinand, Engels; Antonio, Vos; Harry, Vereecken, 2026, "Dataset Tereno Isotope: Delta 18O, and delta 2H values from weekly precipitation samples at the water quality station Erkensruhr 2016 - 2025", https://doi.org/10.26165/JUELICH-DATA/ECGW8D, Jülich DATA, V1</biblCit></citation></docDscr><stdyDscr><citation><titlStmt><titl>Dataset Tereno Isotope: Delta 18O, and delta 2H values from weekly precipitation samples at the water quality station Erkensruhr 2016 - 2025</titl><IDNo agency="DOI">doi:10.26165/JUELICH-DATA/ECGW8D</IDNo></titlStmt><rspStmt><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Andreas, Lücke</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Michael, Stockinger</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Heye, Bogena</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Holger, Wissel</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Sirgit, Kummer</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Ferdinand, Engels</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Antonio, Vos</AuthEnty><AuthEnty affiliation="Forschungszentrum Jülich GmbH">Harry, Vereecken</AuthEnty></rspStmt><prodStmt/><distStmt><distrbtr source="archive">Jülich DATA</distrbtr><contact affiliation="Forschungszentrum Jülich GmbH" email="a.luecke@fz-juelich.de">Andreas, Lücke</contact><depositr>Andreas, Lücke</depositr><depDate>2026-07-15</depDate></distStmt></citation><stdyInfo><subject><keyword>Agricultural Sciences</keyword><keyword>Earth and Environmental Sciences</keyword><keyword>stable water isotopes, precipitation</keyword></subject><abstract>Precipitation amount, delta 18O and delta 2H values of weekly precipitation samples at the runoff/water quality sampling station Erkensruhr-Einruhr (Eifel) 2016 - 2025 from two open precipitation samplers. The Erkensruhr catchment is located in the Eifel mountains about 40 km south-east of the city of Aachen, North Rhine-Westphalia, Germany and is part of the TERENO Eifel/Lower Rhine Valley observatory. Land use in the catchment consists of a mix of forest, meadows, and grassland.</abstract><sumDscr><collDate cycle="P1" event="start" date="2016-03-21">2016-03-21</collDate><collDate cycle="P1" event="end" date="2025-12-15">2025-12-15</collDate><dataKind>Observational data</dataKind><nation>Germany</nation><geogUnit>Eifel</geogUnit></sumDscr><notes>See the description file for further information</notes></stdyInfo><method><dataColl><sources/></dataColl><anlyInfo/></method><dataAccs><notes type="DVN:TOU" level="dv">CC0 Waiver</notes><setAvail/><useStmt/></dataAccs><othrStdyMat><relPubl><citation><biblCit>Bogena, H.R., Montzka, C., Huisman, J.A., Graf, A., Schmidt, M., Stockinger, M., von Hebel, C., Hendricks-Franssen, H.J., van der Kruk, J., Tappe, W., Lücke, A., Baatz, R., Bol, Groh, J., Pütz, T., Jakobi, J., Kunkel, R., Sorg, J., Vereecken, H. (2018). The Rur hydrological observatory: A multi-scale multi-compartment research platform for the advancement of hydrological science. Vadose Zone Journal 17:180055 (10.2136/vzj2018.03.0055).</biblCit></citation></relPubl></othrStdyMat></stdyDscr><otherMat ID="f55730" URI="https://data.fz-juelich.de/api/access/datafile/55730" level="datafile"><labl>Dataset FN_Er description.docx</labl><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.wordprocessingml.document</notes></otherMat><otherMat ID="f55731" URI="https://data.fz-juelich.de/api/access/datafile/55731" level="datafile"><labl>FN_Er_2016_2025.xlsx</labl><notes level="file" type="DATAVERSE:CONTENTTYPE" subject="Content/MIME Type">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</notes></otherMat></codeBook>