Page 218 - 《水资源与水工程学报》2025年第1期
P. 218

!36 "!1 #                         & ' ( ) & * + , -                               Vol.36No.1
               2025 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2025

            DOI:10.11705/j.issn.1672-643X.2025.01.24


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                 F G: ìÂQW}( θ f j‚ƒ(5QW„ã~Y>Á!¯Vm-I>?, ¬j/Wà–«4’mÑÙf}。
                                   )
                 Açi}(5 θ f #ü½ÝMN, 0v9‚¬•hi θ f mWîz(PTF) …†-I。°³m PTF HIj'•*ñ~
                 ?ñC\(5 θ f z{ß9m, •H*ñC\(5m˜¬„ÌtýÊ, O’G$˜¬•ð\Rm# PTF。ai“
                                                                    )、
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                                                                                 om
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                                                                         ,
                 –«。45äåôõ:11 û°³HI PTFªâýEƒ“H*ñ(5m θ f ä³Éd!å•C\(59‚ßÎm
                                                                                                   3
                                                                                                3
                                                             )
                 PTF3 –«Ë5’øëmhiäå, y!üÄ„( ε r ~ÿ!„( ε ) kþt 0.051 ~ -0.024m /m; X¬
                                                                              ,
                                                                     cl
                175 û»i¡\(5z{#G$m PTF –«t θ f          =0.502+0.0013f-0.115 ρ b #–«Ë5d!H*ñ(5m θ f
                                                                             2
                                                                                                   3
                                                                                                 3
                 HI:ö@q}(f) ~ ρ b 34; ÇKz{zb¤Ë5, #–«hi θ f Òm R t 0.48, ε r t 0.035m /m, εt
                               cl
                         3  3
                 -0.024m /m。ï'•?ñ~*ñ(5ß9m PTF ò¬•H*ñ(5½, hi θ f m´åP„, #–«hiäåÓ
                                                           ,
                 •n³m PTF, Œ#–«6’ 2 û'ÑþV×z f ~ ρ b ‘Ž“y˜¬„。
                                                      cl
                 HIJ: H*ñ(5; ìÂQW}; (5|C; r-; Wîz
                 KLMNO:S152.7   PQRST:A    PUVO:1672643X(2025)01021410
                             Developmentoffieldcapacitypedotransferfunctions
                                           forsubtropicalsoilsinChina
                                           WUYingu,QINLu,TIANZhengchao
                         (CollegeofResourcesandEnvironment,HuazhongAgriculturalUniversity,Wuhan430070,China)
                                         )isanimportantparameterforassessingsoilwaterholdingcapacityandag
                 Abstract:Fieldcapacity( θ f
                 riculturalirrigationmanagement ,whichisalsoarequiredinputvariableformanyhydrologicmodels.The
                                                                    isessential,becausedirectmeasurementof
                 developmentofpedotransferfunctions (PTF)forpredicting θ f
                                                                                     weredevelopedmainly
                 soil θ f isbothtimeconsumingandcomplicated.ExistingPTFsforpredictingθ f
                 basedonsoildatafromtropicalandtemperateregions,andtheirapplicabilitytosoilsinsubtropicalre
                 gionsisunknown.ItisnecessarytodevelopanewPTFwhichisapplicabletosubtropicalsoilsinChina.
                                                                                  ),organicmattercontent
                 Inthisstudy ,wemeasuredtheθ f valuesandsoiltexture,bulkdensity( ρ b
                 (f)informationofsoilsfrom175runoffplotsintypicalsubtropicalregionsofChina.Theaccuracyof
                  om
                                                                                           valuesofthein
                 mainexistingPTFswereevaluatedbycomparingthepredictionresultswithmeasured θ f
                 vestigatedsoils.Besides ,wedevelopedanewPTFsuitableforsubtropicalsoilsusingamultivariatestep
                                                                             wasgenerallyunderestimatedby
                 wiselinearregressionanalysismethod.Theresultsshowedthatsoil θ f
                 the11mainexistingPTFs,ofwhichonlythePTF3fromHunan,Chinaproducedrelativelyacceptablees
                                                                                                   3
                                                                                     3
                                                                                                       3
                                                                                  3
                                                   )andameanbias( ε )of0.051m /m and-0.024m /m,
                 timateswitharootmeansquareerror( ε r
                !"#$:20240626; %&#$:20240928
                '()*: å²§-.4989+,(2023BBB049); !"#$%&'(+,(42277295)
                +,-.: !ŸL(1999—), ®, ¥¦§ÿ6, D245E, HIJK(5ÇÕS|}‘àüXm45。
                ¤¥+,: ì•ç(1987—), =, †Áñ¦6, 12, A457, D2EFG, HIJK(5WàOi、 –Ç‹-C|}ÇÕ
                        üXm45。
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