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    <dc:title>Map Cyfleoedd Coetir - Mawn Dwfn</dc:title>
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    <dc:subject></dc:subject>
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    <dct:modified>2025-02-19</dct:modified>
    <dct:abstract>Mae mawn dwfn yn adnodd pwysig yng Nghymru ar gyfer storio carbon, yn cyfrannu at reoli llif dŵr a chefnogi cynefinoedd arbenigol. Mae o dan fygythiad oherwydd newid hinsawdd a thechnegau rheoli tir gan gynnwys trin y tir a draenio. Mae Safon Goedwigaeth y DU (UKFS) yn ei gwneud yn ofynnol na ddylid creu coetiroedd ar briddoedd gyda mawn sy'n fwy na 50cm o ddyfnder neu'n unol â Chanllawiau Gwlad. Mae'n rhaid tynnu ardaloedd o fawn dwfn o'r fath o gynigion creu coetiroedd. Mae map 'Mawndiroedd Cymru' (2022) yn nodi dosbarthiad diweddar o fawn ledled Cymru. Mae'n ffurfio rhan o gyfres o fapiau mawndir, gan gynnwys sgôr tystiolaeth mawn ac amcangyfrif o stociau carbon a ddangosir ar Fap Data Cymru. Crëwyd yr haenau data ar grid 50m lle esboniwyd presenoldeb mawn o amrywiaeth o ffynonellau ar gyfer pob cell grid 50m ledled Cymru.  Rhoddir sgôr tystiolaeth i bob cell grid, sy'n diffinio lefel yr hyder o safbwynt presenoldeb mawn. Mae'r set ddata hon yn darparu amlinelliad o'r holl gelloedd grid 50m sydd â sgôr tystiolaeth mawndir o 2 neu fwy. Cyflwynir manylion llawn y ffynonellau data a ddefnyddiwyd i adeiladu'r map hwn yn ogystal â'r methodolegau a ddefnyddiwyd i ddiffinio lefel y dystiolaeth o safbwynt presenoldeb mawn yn adroddiad methodoleg mapio mawndiroedd Cymru.</dct:abstract>
    <dc:date>2025-02-19</dc:date>
    <dc:publisher>land nature food</dc:publisher>
    <dc:contributor>land nature food</dc:contributor>
    <dc:language>en</dc:language>
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