Designation:D4581–86(Reapproved2001)AnAmericanNationalStandardStandardGuideforMeasurementofMorphologicCharacteristicsofSurfaceWaterBodies1ThisstandardisissuedunderthefixeddesignationD4581;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidedescribesthemethodsusedfordefiningthemorphologiccharacteristicsofsurfacewaterbodies.Thisguidereferencesmanualsthatprovidevariousrationaleandproce-duresnecessarytoconductamorphologicsurvey.1.2Thereferenceswerewrittenforspecificagencyuseandmaynotbeapplicableinallcases(1–6).21.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsinparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D1129TerminologyRelatingtoWater33.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisguide,refertoTerminologyD1129.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1largewaterbodies—waterareaslargeenoughtorequireuseofelectronichorizontalpositioningdevices.3.2.2morphologicsurveys—surveysmadetodetermineshape,depth,andvolumeofwaterbodies;alsodensity,distribution,andvolumeofsedimentandcharacteristicsofwatershedscontributingtothewaterbody.3.2.3smallwaterbodies—waterareasthatcanbesurveyedusingstretchedcablesorvisualtriangulationforhorizontalpositioning.4.SummaryofGuide4.1Thisstandardprovidesguidanceforconductingmea-surementsandassemblyofdataintoastandardformatthatfacilitatescomparativeanalysisofwaterbodymorphologyonanationalbasis.5.SignificanceandUse5.1Nootherstandardspresentlyexistforthesurveyofwaterbodymorphologiccharacteristics.Thetechniquesde-...
