Page 5 - 《水资源与水工程学报》2024年第5期
P. 5

!35 "!5 #                         & ' ( ) & * + , -                               Vol.35No.5
               2024 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2024

            DOI:10.11705/j.issn.1672-643X.2024.05.01


                         2001—2020 123456789:;<


                                      =>?@ABCDEFG


                                                      1
                                                              2
                                             1
                                                                        1
                                      !"# , $ % , & ' , ()* , +,-                 1
                            (1. Q!ARAS-.%<T UVAWXYZ[\]!"#$^_`, ab 100038;
                              2. cde. fghiAB[=jklMmn#$^_`, IJ Jd 710064)
                 H I: @opqarstug 2001—2020 vwxyzf{|}~€C‚ƒ„…, R† MODIS ‡ˆ‰Š‹
                 Œ TsNDVI €}w, 'Ž‘’“zf”‰(TVDI), •–—zf{|}˜~™š。›|, œhžŸ ¡¢
                 £zf[+,„…C9¤¥¦§w{¨©, ª«‚ƒ TVDI }w¢¬­{¨®„¯。°±²o: ³gV´µ¶
                 v· 65.04%{gV¸¹º›»‘{zf, ¼v´µ TVDI ½@ 0.52, ¾¿ÀÁQfÂj, ÃÄÅzfÆ@Ç#;
                2001—2020 v, ³gV TVDI ½ÈÉʦiËÌÍ, βɏÏÐÑ­€, Ò· 91.38%{gVzfÓÔÕÖ×Ø
                 ÙÚÐÛ«;TVDI {}w¢¬­ÜÝ, Þß¹Öà»、 á、 9âã‘ä NDVI å¼æ„¯{ç肃; 麛v
                 ê, ‚ƒ TVDI {ÞO„¯ëè·ì~, íîï+,„…ä9¤¥¦ðzf‚ƒ{ñò­。óçèô†áõö
                  、 =j÷ñ、 øxy=ù°‹äúàADER†kûåüý, •þÿ!h" ä×ØzfðgVxy=ùä#
                 $%&{‚ƒ。
                 JKL: xyzf; ‘’“zf”‰;MODIS; hžŸ ¡; |}€; qarstug
                 MNFOP:P333;P426.616   QRSTU:A    QVWP:1672643X(2024)05000110
              CharacteristicsofagriculturaldroughtanditsinfluencingfactorsintheLoess
                          TablelandofthenorthoftheWeiRiverfrom2001—2020


                                                                             1
                                      1
                                                                                             1
                                                                2
                                                    1
                           LIWenqing,ZHAOYong,LIUZhao,HEGuohua,QINChanghai
                     (1.StateKeyLaboratoryofSimulationandRegulationofWaterCycleinRiverBasin,ChinaInstituteofWater
                       ResourcesandHydropowerResearch,Beijing100038,China;2.KeyLaboratoryofSubsurfaceHydrology
                     andEcologicalEffectsinAridRegion(Chang’anUniversity),MinistryofEducation,Xi’an710064,China)
                 Abstract:ToclarifythespatiotemporalvariationsofagriculturaldroughtsintheLoessTablelandonthe
                 NorthoftheWeiRiver (LTNWR)from2001to2020,weemployedMODISdatatoconstructTsNDVI
                 featurespace.Subsequently,thetemperaturevegetationdrynessindex(TVDI)wasobtained,andthe
                 spatiotemporalevolutionofdroughtswasthoroughlyexamined.Meanwhile ,therelationshipbetween
                 droughtsandnaturalfactorsaswellashumanactivitieswasanalyzedbyGeoDetector ,andthekeydriving
                 factorsofthespatialdifferentiationof TVDIwereidentified.Ourfindingsrevealthat65.04% ofthere
                 gionexperiencedvaryingdegreesofdroughtannually,withanaverageTVDIvalueovermultipleyears
                 standingat0.52 ,indicatingastateofmoderatedroughtacrosstheentireregion.Notably,droughtcondi
                 tionswereparticularlysevereduringspring.Inthestudyperiod ,TVDIvaluesexhibitedfluctuatingand
                 decliningtrendswithstrongpersistence.Inturn ,approximately91.38% ofregionaldroughtconditions
                 eitherimprovedorremainedstableduringthisperiod.Furthermore,thespatialdifferentiationofTVDI
                 waspronouncedandprimarilyinfluencedbyfactorssuchaselevation,temperature,populationdensity,
                 andnormalizeddifferencevegetationindex.TheleadingfactorsaffectingTVDIvariedacrossdifferent

                !"#$:20240507; %&#$:20240711
                '()*: !"#$%&'()*(2021YFC3200204); !"+,-./0)*(52025093、42207084、52109042)
                +,-.: 123(1996—), 4, 56789, :;%<=, %<>?@ABCADE。
                /0+,: F G(1975—), H, IJKL9, :;, MN, :;=OP, %<>?@ABCADE。
   1   2   3   4   5   6   7   8   9   10