Avaliação de desempenho do modelo ISAREG de simulação de balanço hídrico

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Carmen Ilse Jobim2_{e José Antônio Louzada}3

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Performance evaluation of the water balance simulation model ISAREG

Abstract !"#$!%&'()*!+,-$.!/0+1.23$/!3#$!/,0.!423$5!62.278$9!"#$!:$5;,5+278$!,;!3#$!+,-$.!42/!$<2.123$!07!3#$!8,7-0=,7/!,;! 3#$!>?.272.3,!@$-0,A!($B0,7C!!07!(0,!*527-$!-,!&1.!&323$!DE52F0.G9!H,+:250/,7/!2+,7B!/,0.!423$5!8,73$73/!$/=+23$-!6I!3#$!423$5! 62.278$!,;!3#$!/,0. :.273 23+,/:#$5$!/I/3$+!27-!,6/$5<$-!-232!;5,+!3$7/0,+$3$5/!4$5$!:$5;,5+$-C!07!,5-$5!3,!<2.0-23$!3#$!+,-$.! ;,5!3#$!($B0,79!'!:$5$7702.!B52//!42/!1/$-!2/!5$;$5$78$!85,:!;,5!3$/=7B!3#$!+,-$.C!4#0.$!3#$!/,0./!27-!+$3$,5,.,B082.!:252+$3$5/! 4$5$!8,..$83$-!23!3#$!>)+652:2!"50B,A!H$73$5C!07!?2//,!J17-,C!(&!DE52F0.G9!"#$!5$/1.3/!/#,4$-!2!#0B#!:,3$7=2.!2-#$5$78$!2+,7B! /0+1.23$-!27-!,6/$5<$-!-232C!/,!07-082=7B!27!2-$K123$!:$5;,5+278$!,;!3#$!+,-$.!07!3#,/$!8,7-0=,7/9!'88,5-07B!3#$!/32=/=82.! 07-0823,5/!,63207$-!;5,+!5$B5$//0,7!272.I/$/C!3#$!:$5;,5+278$!,;!3#$!%&'()*!+,-$.!42/!8,7/0-$5$-!2/!<$5I!B,,-!27-!03!827!!6$! used for the water balance of the “Planalto Medio” Region (RS).

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TABELA 2'9'H,7-0LM$/!-,!:$5Q.!$!825283$5N/=82/!R/082/!-,!/,.,!-2!$/32LP,!+$3$,5,.SB082!-2!)+652:2!"50B, Parâmetro kI=I?I ~>VG]>KS@'( "V>WHK?G?I?@'I?>SI?I'iQ=j l; c@mSHVI'! _{8 ''IV@GIt''!;''FGAS@t'l!''IVNGAIt'''T<} w=G?I?@'NVIXG=USVGQI'KI'kIOIQG?I?@'?@'kI=O>'w-_QQ'ij8 _;28q w=G?I?@'NVIXG=USVGQI'K>'">KS>'?@'THVQPI'"@V=IK@KS@'w-_O='ij8 _;28{ e@KFG?I?@'?>'F>A>'?_s'iNyQ={_j8 _!2{6

Fonte: 1_{câmara (2004);}2_{curva de retenção da umidade do solo determinada por Cunha (2003)}

r

(Oi O) (Pi P) (O O)(P P) 2 i 1 N 2 i 1 N i i i 1 N

=

- -- -= = =

/

d 1 ( P O O O (P O ) i 2 i 2 i 1 N i i 2 i 1 N = -- + -= = R T S S S SS V X W W W WW

/

(6)

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TABELA 4 9'Umidade volumétrica média do solo gramado, em cm3_/cm3_{, relacionada às tensões medidas no tensiômetro}

DT_TensiômetroG!$!/0+1.2-,!:$.,!+,-$.,!%&'()*!DT_ISAREG), no período de 16 de fevereiro a 31 de março de 2006, Passo Fundo, RS

DIA Tensiômetro ISAREG DIA Tensiômetro ISAREG

1 _0,275 _0,270 ₂₃ _0,250 _0,234 2 _0,252 _0,270 ₂₄ _0,251 _0,243 3 _0,243 _0,261 ₂₅ _0,247 _0,237 4 _0,238 _0,252 ₂₆ _0,247 _0,234 5 _0,237 _0,244 ₂₇ _0,246 _0,232 6 _0,252 _0,240 ₂₈ _0,245 _0,231 7 _0,250 _0,252 ₂₉ _0,237 _0,231 8 _0,248 _0,243 ₃₀ _0,230 _0,230 9 _0,269 _0,238 ₃₁ _0,228 _0,230 10 _0,272 _0,270 ₃₂ _0,277 _0,230 11 _0,263 _0,270 ₃₃ _0,278 _0,270 12 _0,262 _0,270 ₃₄ _0,288 _0,270 13 _0,257 _0,260 ₃₅ _0,280 _0,270 14 _0,285 _0,250 ₃₆ _0,292 _0,270 15 _0,275 _0,270 ₃₇ _0,294 _0,270 16 _0,266 _0,265 ₃₈ _0,288 _0,270 17 _0,271 _0,262 ₃₉ _0,284 _0,265 18 _0,271 _0,270 ₄₀ _0,281 _0,257 19 _0,265 _0,260 ₄₁ _0,271 _0,248 20 _0,260 _0,251 ₄₂ _0,300 _0,247 21 _0,256 _0,241 ₄₃ _0,288 _0,270 22 _0,242 _0,236 ₄₄ _0,284 _0,261 IS AREG=0,9592 tensiômetro 0,2 0,25 0,3 0,220 0,270 0,320 !!tensiômetro (cm3/cm3) IS A R E G ( c m 3 /c m 3 )

FIGURA 1'9'Análise da regressão linear entre os valores da umidade volumétrica do solo gramado, em cm3 _/cm3_C!,6=-,/!

:$.,!+,-$.,!%&'()*!DT_ISAREGG!$!:$.,!3$7/0U+$35,!DT_Tensiômetro), no período de 16 de fevereiro a 31 de março de 2006, Passo Fundo, RS

(7)

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TABELA 5 - !"#$%&'( )!*+( ",-./&'( )/*( "( /"%"01"23'( )#*(

calculado para a relação entre os valores da umidade volumétrica do solo gramado, simulados pelo modelo ISAREG e medidos no tensiômetro, no período de 16 de fevereiro a 31 de março de 2006, Passo Fundo, RS

(%"A(*1" valor

r T5WWP_

d T5dW_V

$ T5dWVW

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Ecossistemas. VE+'E B(0"$($">"Z :78Fr5 X+O=%E '+ [@#($" +

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K:6v:6985 HEFE5 B:9:6985 FE7E 6789:;Z 8& 600(A"<%& 7$?+'.1(&A C%'+1E -=-<, D/779*'5 !+l X+1?(5 3E_Q5 &EV5 OEVWU_P5 QWWVE

KJN9!KJI86K:5 YE IEG C8KJ:95 HE 9E The Water Budget

"'2,)%(,@(9,)',-&&)E"*$'F,I"#?(&A=%&'E$Z +'E5 QWSSE OE\_RU

(8)

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