Page 6 - 《水资源与水工程学报》2024年第5期
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2                        & ' ( ) & * + , -                 2024 $

                 years,reflectingthemultifacetedimpactsofnaturalfactorsandhumanactivitiesondroughtconditions.
                 Toaddressthesechallenges ,integratedmeasuresincludingclimatemonitoring,ecologicalrestoration,
                 optimizationofagriculturalproductionstructures,andimprovementofwaterresourcesutilizationefficien
                 cyareessential.Thesemeasureswillfacilitatemoreaccuratepredictionandmitigationoftheimpactsof
                 droughtsonregionalagriculturalproductionandsocioeconomicdevelopment.
                 Keywords:agriculturaldrought;temperaturevegetationdrynessindex(TVDI);moderateresolutionim
                 agingspectroradiometer (MODIS);GeoDetector;spatiotemporalcharacteristics;theLoessTablelandon
                 theNorthoftheWeiRiver (LTNWR)
                                                               ᬄ…; ­®å       [16] R†¯Ï’“”‰(enhanced
            1 ./01
                                                               vegetationindex ,EVI) äh²‘(landsurfacetem
                 zf'@‚ƒ()%&#$*ÐÑ&+{#ß                          perature ,LST) 'Ž TVDI, °èhžŸ ¡Ÿ°r
            „…, ,-&{f./0Ç#, ðxyù1ä!"2                          sà:hg 2001—2020 vwzf|}~€C,
            3d(‹4Ç#56          [14] 。q5anrstuhg               ‚ƒ„…; ±œ:å       [17] ²³rsà:sGA{~
            ( 78qarstug) 9Ársà:;6n、 q5•                        ™š, –—sGA¢[ËA䒓~§w{™
                                                                            [18]
            a, '@Q<Bo{#ß&Eh•Cr5UV9¤¥                           ¨­; ´µµå        ¶·ðrsà:fÓuv¦jö
            ¦{àϑgV, ,zf=>{%<º?¨@hg2                            , %<ËA、 áåá¬ß…ðzf{‚ƒ¸_;
            3ä=jd(, þð()zf%<A·#ß{BCD                           ¹ºå   [19] ¶· Copula »‰ä¼½¾YV, ðJah
            ½ [5] 。³hguE´F、 sGHI, AJxyøKà                      gxyzf[á¬zf§w{ƒl¨¿uvÀÁ
            ùìó{L、 MN, gO·PQR、 STUåe、 Q                       {¢£。ÂÃij%<érshg{zf=>ÄÅ
            VWg, XY!#ß{2Z[ù\/h。,], zf                          Ս¨«{u+, ÆÇÈéɼ>E½Õu¨‹Ÿ
            ^4@_Òqarstugxy*ÐÑ&+{#ß                             °。ÊË, zf{z¦¸_、 zfð=jXhäxy
            „…, ³hgADE`a、 AsUbÇ#, c§ËA|                        =ù{A¿‚ƒå, µ@ÌÍÎÏЕ%<{ÑV。
            }¢dºµ, eÕzffNg&, ðxy=ùä=j                          Ò%<#$¨Óqarstug{xyzfÓÔ, R
            Xhi4je‚ƒ          [6] 。zfº?‚ƒ³hgx'                † MODIS ‡ˆ‰ŠuvfÓö , ΰèá、 Ë
            k{=c&m, Olmùnopq, rcsAsU                          A、 à»å+,„…CÔ¨’“”‰(normalized
            bä=jXht         [78] 。ðqarstugxyfÓ               differencevegetationindex,NDVI)、 shR†¤V~
            uvö , wx,xyzf¼yz¦„…, XY!J                          、 9âã‘å9¤¥¦„…, ç袣xyzf{
            agV%&*ÐÑ&+{{|ß}。                                   z¦¸_, •Õ@Ìhf.Ö]×Ø{_«úÙB
                 zfö Þß~Á€$| ‰Š[‡ˆ‰                           C, Ú¦Ìhxy=ù{&+。
              [9]
            Š 。ÁhE| ‰Š‚•(EîïgVzfÂ
                                                              2 234()./56
            Ô, ƒ„‡ˆ‰ŠéxyfÓö Q…†‡Š#ßh
              [10]
            9    。ˆ‰%&&+ä-Š{u‹, ‡ˆŠŒ&=                        2.1 XY8Z[
            #e~, ƒ„Žˆ¡y¤/̏, Q¢‘û4’L                             qarstug9Áq5•a、 rsà:;6
            “ ” (moderateresolution imaging spectroradiometer,  n, éIJªhO, ÛÜ 38 æÝ( g)( Þ 1)。hž
            MODIS) íyeV}w‡ˆ”¡‹•9–{—˜。™                         ßàáÁ 34°~37°N、106°~111°E§w, âeãÅ
            šÁŽ›Žˆ¡,MODIS éxyzfö >E+ɏ                         ä­áõ, ËA|}¢dºµ, ¼v´µËA1é
            ÜÝøÍ    [11] 。/Á MODIS ‰Š, ¼yxyzfö ”               536.76~545.20mm§w, åæ›Å, ¹AB、 á¬
            ‰Õ•&+     [12] 。,Q‘’“zf”‰(temperature             zf56še      [6] 。
            vegetationdrynessindex ,TVDI) „,ìóß{‰ŠB‰           2.2 \]^_`abc
                                       [13]
            šœ、 'Ž7]J¹.žŸ                , e1%<¡^,TV             ້Š(digitalelevationmodel,DEM) çEÁ
            DI éxyfÓö Q²É¢£, ¤4@xyzfö                          è€ http://www.gscloud.cn/, }w¢‘û@ 90m。
                                [10,1416]
            [¥¦{#ߧA§¨                。                            %<Q‡ˆ‰Š"Àžµé GEE(GoogleEarth
                 !©å    [15] /Á MODIS ‰Š¢£IJªz               Engine) ´tÄé4, ³´tA·Oê{ëì、 eá
            f|}˜~{ÌÍ, Ο<[zf~㫙¨{                           ChíîïŽð。|wñòè4ó†ôe½è4
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