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             pÁJ­M                                 2020 • WorldCover10m·S          ]+ôçÜ
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                                                                  k+ 1
                                                                                               k+ 1
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                          t                                              HX )   T                        (5)
                                                                             f
                     0 ∑
            SW =SW +        (R -Q  surf,i -E -W seep,i -Q )                  k+1
               t
                                                      gw,i
                               i
                                          i
                                                                                f
                                                                           T
                                                                       f
                                                                                    T
                         i= 1                                  K k+1  =P H (HP H +R )       -1           (6)
                                                                                         k+1
                                                                                k + 1
                                                                       k + 1
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                                                               X   =X     +K [(Y      +v )-HX ]
                                                                k+1    k+1   k+1   k+1   k+1      k+1
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                    t
                                                                                   k+1
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                                     i
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                                                  i
                                                                                             f
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                                                               BUZ,°5Æ;H?“”8Û, ï“”UZK
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                                                   、
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                                                                                                        k+1
                                                                k+1
                 Q =Q      +Q    +Q                    (2)
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                                                               k+1 â¿^“”UZÆ,°。
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                                                               2.5 ¸z{|}9€
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            X f                             ~N(0,Q))
                        k,i
                              k
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                                                       ( 3)
                                                               †SBÆ x, /µï?:
            ¹¢:X   f                                               X=[xx… x]     T                       (8)
                   k + 1,i ? k+1 â¿Ë i †SBUZ,°^SB
                                                                         1 2
                                                                               L
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                                              k,i
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                                             k
            Øù×>Z; ω k ?5Æ? 0、 =k? Q ^X·OR                         Y=[yy… y]      T                      (9)
                                               k
                                                                        1 2    m
            w;Q ?qr¢k^=kH`。                                        žôc­ EnKF–¹Ì8ƒàÁE"H`, o
                  k
                 €'xqrSB[cÆ9¥qrSB[c^=                          qrSBUZ}¶kX。
            kH`ô, qrSBUZ^[cÆ'x“”Fk                            2.6 JK¿S
            X, /–¹Y—:                                              ?†.qr[”K¾”Æ^djOZ, g­S
                            n
                       1        f      f       f
              f
                  T
            P H =         ∑  (X     -X )(HX        -           à. Wù (Nash-Sutcliffeefficiencycoefficient,
              k+1               k+1,i  k+1     k+1,i
                      n-1  i= 1
                                                               NSE)、 5=5¢k(rootmeansquareerror,RMSE)
                         f
                      HX )  T                          (4)     »>†.qrq™.—           [21] 。/¢,NSE hioq™
                         k+ 1
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