international legend for hydrogeological maps

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1、INTERNATIONALASSOCIATIONOFHYDROGEOLOGISTS(IAH)INTERNATIONALASSOCIATIONOFHYDROLOGICALSCIENCES(IAHS)UNITEDNATIONSEDUCATIONAL,SCIENTIFICANDCULTURALORGANIZATION(UNESCO)InternationalLegendforHydrogeologicalMaps-Revisedversion,1983-ContentsPreface1Foreword51.HistoricalDevelopmentoftheLegendandtheInt

2、ernationalHydrogeologicalMapofEurope(H.KARRENBERG)92.Introduction173.InternationalLegendforHydrogeologicalMapsA.BackgroundInformation23B.GroundwaterandRocks24C.Lithology25D.Representationofdetaileddata294.SelectedListofHydrogeologicalMaps45-5-FOREWORDThelargeandgrowingnumberofhydrogeologicalma

3、psthrough•outtheworldisevidenceofthegeneraltendencytopresentbothdataandtheirinterpretationinmapform.Thismethodofpresentationpermitsarapidarealevaluationofthehydro-geologylinkedtotheadvantagesofatopographicbase.Thereis,however,likelytobeaconsiderablevariationintheamountofinformationdepictedupon

4、agivenmap,dependingbothuponthechosenscaleanduponthepurposethemapisintendedtoserve.ThisLegendisintendedtobeaguidetothepreparationofhydrogeologicalmapsatanyscaletoauniformstandard.Alistisgivenofthesymbols,ornamentsandcolourswhichhavespecificmeaningsandthatareinternationallyrecog•nised.Thispresen

5、tLegendisbasedupontheInternationalLegendforHydrogeologicalMapspublishedjointlyin1970bytheInter•nationalAssociationofHydrogeologists,theInternationalAssociationofHydrologicalSciences,UNESCO,andtheInsti•tuteofGeologicalSciences(London).Usedinmanymappingprojectsthroughouttheworld,the1970Legendisn

6、owoutofprint,andarevisededitionisbeingprepared-Asapreli•minarystep,asimpleandinexpensiveversionhasbeenpro•ducedhereasaUNESCOdocumentinEnglishlanguageonly,andwithoutcolourillustrations.Atsomefuturedate,afterade•quatereviewandtrialofthisrevisedLegend,itisintendedthatadefinitiveandmulti-lingualve

7、rsionwithcolourillustrationswillbepublished.-6-Forthecompilationofthe1970Legend,workinggroupsweresetupwithintheInternationalAssociationofHydrogeologists(IAH)andtheInternationalAssociationofHydrologicalSciences(IAHS).Therecommendationsof