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Uploaded by
Usama Waly
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אאאא א -٤٨- 4.1Introduction: אאאאאאא אאאאאK אאאא،אא אאאאKאאא אאא،אאאK אאאא،אאאאא אאאאK אאאאאא אKא،אאא אאאאא אאKאאאאא אא،אאאאאאאא אאאKאאאא א،אF4.1Eאאאא אאאאאW F4.1E L h i = W i=אא h=א L=אאאאK א،א3 kmאא30 m אאW 01.0 10003 30 = × == L h i
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אאאא א -٤٩- 4.2אDarcy's Law 1856אאאאFvEא אאFiE،W F4.2E ikv = FkEאאאאא א،אFWאKEא אא،אF4.1KEאאאאא אאK F4.1WEאאא אאאאא אאW F4.3E iAkQ = اﻟﻤﺎء ﺗﺪﻓﻖL اﻟﻤﺎء ﺗﺪﻓﻖ h
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אאאא א -٥١- אW אאאאאK 2 212 mA =×= אאW 03.0 300 9 ==i אF4.3E،אW widthlayerofmeterperdaym day hr hr s s m sm iAkQ /10.31243600106.3 /106.3203.0106 3 3 4 343 =×××= ×=×××= = − −− 4.3אMeasurement of permeability אאאFkEאא אאאKאW ١Eאא ٢Eאא אאאK 4.3.1אאW אאundisturbed sample אאאאאאK אאW •אאאConstant head test •אאאFalling head test
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אאאא א -٥٢- אאאאW ١KאאאאאK ٢Kאאאאאא אK ٣KאאאאK ٤Kאאאאאאא אאאאK אאאConstant head testW אאאאא אאKאF4.2Eאא،אא אKאא אא، אK F4.2WEאאא L א א אא א h א א
8.
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9.
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אאאא א -٥٤- אW אW 2 22 7854 4 100 4 mm D A = × == ππ אאאW 3 35000350 mmmlQ == אF4.6E،אאW smsmm Aht QL k /1043.7/7427.0 602607854 120350000 4− ×== ××× × == אאאFalling head testW אF4.3Eאאאא אאאאאKאא אKאאאאא א،אאאK F4.3WEאא L اﻟﻌﻴﻨﺒﺔ ﻣﺴﺎﻣﻲ ﺣﺠﺮ 1h ﻣﺪرج أﻧﺒﻮب 2h A اﻟﻤﺎء ﻣﺼﺪر
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11.
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אאאא א -٥٦- אW אW 2 22 7854 4 100 4 mm D A = × == ππ אאW 2 22 63.19 4 5 4 mm D a = × == ππ אF4.7E،אאW sm smm h h At aL k /10744.1 /10744.1 550 1350 log 6037854 14067.19 30.2log30.2 6 3 10 2 1 10 − − ×= ×= ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ×× × ×== 4.3.2אאFאאPumping TestWE אאאאאא אאKאאאאא אאKאאאא אאK אאאא،אאFpumping testE אאאKאאcasing pipeאאא אאאאאK אFobservation wellsEאאF4.4E، א،אא אאK
12.
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אאאא א -٥٧- F4.4WEאא אאאאאKאאא אאאאאK א،אאא،אאא אאאאאאאא אאW F4.8E ( )2 1 2 2 1 2 ln hh r r Q k − ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ = π W k=אאא Q=אאא 1r=אאאאא 2r=אאאאא 1h=אאאאא 2h=אאאאא א 1r 1h אאא אאא FQEא א 2r 2h
13.
٢٥٢ אאא
אאאא א -٥٨- F4.4WE אאאאאאא11.20 m אא،אאאא6.20 m3 /minאא אאא5.15 mאאא2.48 mKאאא אא4.33 m45.86 m،אFcm/sKE א: אאאאW mh 05.615.520.111 =−= mh 72.848.220.112 =−= אאW smmQ /1033.0 60 20.6 min/20.6 === אF(4.8אאW ( ) ( ) ( )( ) scm sm hh r r Q k /1097.1 /1097.1 05.672.8 33.4 86.45 ln1033.0ln 5 3 222 1 2 2 1 2 − − ×= ×= − ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ × = − ⎟⎟ ⎠ ⎞ ⎜⎜ ⎝ ⎛ = ππ 4.4אאאEquivalent Permeability in Stratified SoilW אאKאא אאאKא ،אאאאא אאאאאK אאאאאא אאאאאאK
14.
٢٥٢ אאא
אאאא א -٥٩- אF4.5EאFnEאאW •אאאFWHE •אW( )nHHHH ...321 •אאאW( )xnxxx kkkk ...321 •אאאW( )znzzz kkkk ...321 אאאאxkאאW F4.9E H kHkHkHkH k xnnxxx x ++++ = ...332211 אאאאzkאאW F4.10E zn n zzz z k H k H k H k H H k ++++ = ... 3 3 2 2 1 1 F4.5WEאאאא H1 H2 H3 H ... Hn H k1z k1x knz knx k2z k2x k...z k...x k3z k3x אא
15.
٢٥٢ אאא
אאאא א -٦٠- F4.5WE א، אאW sec/10658 sec/10205 sec/10803 6 33 5 22 6 11 mkmH mkmH mkmH − − − ×== ×== ×== אאאאאאאK אW אאאאxkW 321 332211 HHH kHkHkH k xxx x ++ ++ = sec/101.1 853 106581020510803 4 656 mkx − −−− ×= ++ ××+××+×× = אאאאzkW 3 3 2 2 1 1 321 zzz z k H k H k H HHH k ++ ++ = sec/106.8 1065 8 1020 5 1080 3 853 5 656 mkz − −−− ×= × + × + × ++ = 4.5אאאאFactors Affecting Soil PermeabilityW אאאאKאאW ١KאאWאאאK ٢KאWאאאאאK ٣KאWאאאאאK ٤KאאWאאאא،א אאK ٥KאWאאאK
16.
٢٥٢ אאא
אאאא א -٦١- ProblemsW ١(m2sm /102 4− ×אא%2، אאאאאאאאK ٢Eאאאא،אא אF(QK ٣(אאאאאאאאW 3 m 2 m 4 m sec/108 3 cmk − ×= sec/102 4 cmk − ×= sec/104 2 cmk − ×= m18 m4.5 FQEא m42 m2.2 smk /104 3− ×= m5.16
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