SWAT土壤库各参数

本文格式为Word版，下载可任意编辑——SWAT土壤库各参数变量名称SNAMNLAYERSHYDGRPSOL_ZMX土壤名称土壤分层数模型定义Optional解释TITLE/TEXT位于.sol文件的第一行，用于说明文件Optional土壤水文学分组（A、B、C或D）土壤剖面最大根系深度（mm）土壤最大可压缩量，以所占总土壤体积的分数表示土壤层结构各土壤层底层到土壤表层的深度（mm）3RequiredonlyfortheSWATArcViewinterface.Required模型默认值为0.5，Optional模型默认值为0.5，OptionalOptional注意最终一层是前几层深度的的加和。RequiredANION_EXCL阴离子交换孔隙度SOL_CRKTEXTURESOL_ZSOL_BDSOL_AWCSOL_KSOL_CBNCLAYSILTSANDROCKSOL_ALBUSLE_KSOL_EC土壤湿密度（mg/m或g/cm3）MoistbulkRequireddensity土壤层有效持水量（mm）AvailablewatercapacityofthesoillayerRequired饱和导水率/饱和水力传导系数（mm/h)RequiredSaturatedhydraulicconductivity土壤层中有机碳含量粘土含量，直径2.0mm的土壤颗粒组成地表反射率（湿）USLE方程中土壤侵蚀力因子土壤电导率（dS/m）在中国没有相关可用来借鉴的好的经验公式来计算，在此默认为0.01默认为0Moist潮湿的bulk容积density(Mg/m3org/cm3)：

Thesoilbulkdensityexpressestheratioofthemassofsolidparticles固相颗粒tothetotalvolumeofthesoil,ρb=MS/VT.Inmoistbulkdensitydeterminations,themassofthesoilistheovendryweightandthetotalvolumeofthesoilisdeterminedwhenthesoilisatornearfieldcapacity.Bulkdensityvaluesshouldfallbetween1.1and1.9Mg/m3.

Availablewatercapacityofthesoillayer(mmH2O/mmsoil)：Theplantavailablewater,alsoreferredtoastheavailablewatercapacity,iscalculatedbysubtracting减法thefraction部分ofwaterpresentatpermanentwiltingpointfromthatpresentat

fieldcapacity,AWC=FC?WPwhereAWCistheplantavailablewatercontent,FCisthewatercontentatfieldcapacity,andWPisthewatercontentatpermanent永久的wiltingpoint凋萎点.

Availablewatercapacityisestimatedbydeterminingtheamountofwaterreleasedbetweeninsitufieldcapacity(thesoilwatercontentatsoilmatricpotentialof-0.033MPa)andthepermanentwiltingpoint(thesoilwatercontentatsoilmatricpotentialof-1.5MPa).

Saturatedhydraulicconductivity(mm/hr)：Thesaturatedhydraulicconductivity,Ksat,relatessoilwaterflowrate(fluxdensity)tothehydraulicgradientandisameasureoftheeaseofwatermovemen