{"id":8877,"date":"2024-06-10T14:54:05","date_gmt":"2024-06-10T13:54:05","guid":{"rendered":"https:\/\/afonyddcymru.cambrianweb.dev\/safleoedd-tir-halogedig-ac-afonydd-yng-nghymru\/"},"modified":"2026-10-17T22:43:56","modified_gmt":"2026-10-17T21:43:56","slug":"safleoedd-tir-halogedig-ac-afonydd-yng-nghymru","status":"publish","type":"post","link":"https:\/\/afonyddcymru.cambrianweb.dev\/cy\/safleoedd-tir-halogedig-ac-afonydd-yng-nghymru\/","title":{"rendered":"Safleoedd Tir Halogedig ac Afonydd yng Nghymru"},"content":{"rendered":"<div class=\"et_d4_element et_pb_section et_pb_section_0 et_hover_enabled  et_pb_css_mix_blend_mode et_section_regular section_has_divider et_pb_top_divider et_block_section\" >\n\t\t\t\t<div class=\"et_pb_top_inside_divider et-no-transition\"><\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_d4_element et_pb_row et_pb_row_0 et_hover_enabled  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_0  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_0  et_pb_text_align_center et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h4 style=\"text-align: left;\">Safbwynt Afonydd Cymru<\/h4><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_1  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p>Mae safleoedd tir halogedig yn parhau i fod yn etifeddiaeth o orffennol diwydiannol cryf Cymru. Yn hanesyddol, gwaredwyd y deunyddiau hyn yn rheolaidd drwy safleoedd anghyfreoleiddiedig megis chwareli segur. Daeth yr halogiad o ystod eang o ddeunyddiau, yn dibynnu ar y diwydiant dan sylw. O'r safleoedd a nodwyd yng Nghymru, y prif halogion oedd benzo(a)pyrene, plwm ac arsenig \u2013 a ddarganfuwyd mewn dros 60% o\u2019r safleoedd. Roedd cemegau eraill yn cynnwys Hydrocarbonau Monoaromatig (MAHs), cyfanswm hydrocarbonau petrolewm (TPH), Hydrocarbonau Aromatig Polysyclig\u00a0 (PAHs) a Biffennylau Polyclorinedig (PCBs).<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Cyn 2001 a chyflwyno\u2019r drefn tir halogedig yng Nghymru, nid oedd dull penodol ar waith i ymdrin \u00e2\u2019r halogiad tir hanesyddol ar safleoedd \u00e2 photensial isel ar gyfer ailddatblygu. Ymdrinnir \u00e2 halogiad tir yng Nghymru yn bennaf drwy'r broses gynllunio (93% o'r safleoedd).<\/p>\n<p><\/p>\n<p>Cyflwynwyd deddfwriaeth sylfaenol gyntaf i ymdrin ag etifeddiaeth hanesyddol tir halogedig drwy Ran 2A o Ddeddf Diogelu\u2019r Amgylchedd 1990. Fe\u2019i hymgorfforwyd yn Neddf Diogelu\u2019r Amgylchedd (1990) gan adran 57 o Ddeddf yr Amgylchedd (1995), ac fe ddaeth i rym yng Nghymru ar 1af o Orffennaf 2001. Cafodd y rhain eu disodli gan Reoliadau Tir Halogedig (Cymru) 2006, sy\u2019n cynnwys darpariaethau ychwanegol ar gyfer safleoedd sydd wedi\u2019u heffeithio gan halogiad ymbelydrol. Mae\u2019n gosod dyletswydd statudol ar Awdurdodau Lleol (fel y prif reoleiddwyr) i archwilio eu hardaloedd er mwyn nodi tir halogedig. Gwneir hyn yn unol \u00e2\u2019r strategaeth archwilio a gyhoeddir gan yr Awdurdodau Lleol.<\/p>\n<p><\/p>\n<p>Diffinnir Tir Llygredig yn Rhan 2A fel unrhyw dir sy\u2019n ymddangos i\u2019r Awdurdod Lleol yn yr ardal y mae\u2019r tir ynddi i fod mewn cyflwr o\u2019r fath, oherwydd sylweddau yn, ar neu o dan y tir, fel bod:<br \/>(a) niwed sylweddol yn cael ei achosi neu fod posibilrwydd sylweddol o achosi niwed o\u2019r fath; neu<br \/>(b) llygredd sylweddol i ddyfroedd rheoledig yn cael ei achosi, neu fod posibilrwydd sylweddol o achosi llygredd o\u2019r fath.<\/p>\n<p><\/p>\n<p>Ers 2001, mae tua 3% o safleoedd halogedig wedi cael eu trin o dan Ran 2A o Ddeddf Diogelu'r Amgylchedd 1990 a swm tebyg trwy gamau gwirfoddol.<\/p>\n<p><\/p>\n<p>Er mai Awdurdodau Lleol yn unig sy'n gyfrifol am nodi tir halogedig yn ffurfiol, mewn rhai amgylchiadau penodol, Cyfoeth Naturiol Cymru fydd yn gyfrifol am sicrhau bod safleoedd yn cael eu hadfer. Gelwir y rhain yn Safleoedd Arbennig, a ddiffinnir fel tir halogedig a bennir o dan Ran 2A sydd hefyd yn bodloni un neu fwy o amodau a nodir yn Rheoliadau Tir Halogedig (Cymru) 2006. Gellir dynodi tir halogedig fel safle arbennig os yw\u2019n perthyn i gategor\u00efau defnydd penodol o dir neu\u2019n arwain at fathau penodol o lygredd i ddyfroedd rheoledig. Dim ond dau safle o\u2019r fath sydd wedi\u2019u dynodi yng Nghymru.<\/p>\n<p><\/p>\n<p>Erbyn diwedd mis Rhagfyr 2013, roedd 175 o safleoedd wedi'u pennu o dan Ran 2A, gan gynnwys dau safle arbennig dynodedig. O'r 175 o safleoedd tir halogedig, cafodd 64 o\u2019r penderfyniadau eu dirymu yn 2009. Adroddodd yr awdurdodau lleol fod 97 o safleoedd allan o 111 o safleoedd wedi'u hadfer yn llwyr.<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Dangosodd adolygiad gan Cyfoeth Naturiol Cymru yn 2016 fod 10,130 o safleoedd halogedig posibl yng Nghymru wedi'u nodi ar gyflwyniad y ddeddfwriaeth. Yn dilyn hynny, cafodd 800 o\u2019r safleoedd \u00e2\u2019r flaenoriaeth uchaf eu harchwilio\u2019n fanwl, gyda 175 ohonynt (gan gynnwys dau Safle Arbennig) yn cael eu pennu\u2019n ffurfiol fel tir halogedig.<\/p>\n<p><\/p>\n<p>Mae'r 175 o safleoedd tir halogedig yng Nghymru wedi'u gwasgaru ar draws 11 ardal Awdurdod Lleol. Cafodd y rhain eu nodi naill ai oherwydd eu heffaith ar iechyd dynol neu ar ddyfroedd rheoledig. Nid oes sicrwydd bod hyn yn cynrychioli'r holl safleoedd halogedig yng Nghymru, dim ond y rhai a nodwyd o dan yr adolygiad deddfwriaethol cychwynnol. Ers adolygiad 2016, mae un safle arall wedi'i bennu gan Awdurdod Lleol fel tir halogedig.<\/p>\n<p><\/p>\n<p>Mae tir halogedig yn fater cymhleth iawn ac nid oes gan sefydliad bach fel Afonydd Cymru unrhyw arbenigedd yn y maes hwn gan gynnwys ynghylch halogion penodol, fel PCBs. Yn yr un modd, nid oes gan yr ymddiriedolaethau rhanbarthol sy'n gweithredu ar yr afonydd hyn y fath arbenigedd chwaith. Felly, nid ydym mewn sefyllfa i ateb unrhyw ymholiadau sy\u2019n ymwneud \u00e2 thir halogedig.<\/p>\n<p><\/p>\n<p>Fodd bynnag, rydym yn pryderu ynghylch nifer o achosion gwirioneddol a phosibl o ryddhau deunyddiau o safleoedd tir halogedig i\u2019n hafonydd, yn enwedig ym Maendy, T? Llwyd a Brofiscin. Rydym wedi bod yn adrodd y pryderon hyn yn rheolaidd, yn enwedig mewn perthynas \u00e2 gollyngiadau heb eu rheoli o'r safleoedd i gyrsiau d?r a bydd ein hymddiriedolaethau\u2019n parhau i adrodd pryderon ynghylch pob llygredd a amheuir i Cyfoeth Naturiol Cymru pan neu bryd y byddant yn eu gweld wrth ymgymryd \u00e2'u gwaith dyddiol.<\/p>\n<p><\/p>\n<p>Fel rhan o'n gweledigaeth ar gyfer afonydd gl\u00e2n ac iach i bob cymuned yng Nghymru, hoffai Afonydd Cymru weld Llywodraeth Cymru, Awdurdodau Lleol a Chyfoeth Naturiol Cymru yn rhoi mwy o ffocws ac adnoddau i'r safleoedd tir halogedig hyn er mwyn lleihau unrhyw niwed posibl i iechyd pobl neu i'r amgylcheddau daearol a dyfrol.<\/p>\n<p><\/p>\n<p><strong>Afonydd Cymru, Mehefin 2024.<\/strong><\/p><\/div>\n\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Mae safleoedd tir halogedig yn parhau i fod yn etifeddiaeth o orffennol diwydiannol cryf Cymru&#8230;<\/p>\n","protected":false},"author":3,"featured_media":8540,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[60],"tags":[],"class_list":["post-8877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-datganiadau-sefyllfa"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - 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