Groundwater Flow and Contaminant Transport
Groundwater Flow and Contaminant Transport BSysE 595
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This 5 page Class Notes was uploaded by Haylie Rowe on Thursday September 17, 2015. The Class Notes belongs to BSysE 595 at Washington State University taught by Staff in Fall. Since its upload, it has received 54 views. For similar materials see /class/205960/bsyse-595-washington-state-university in Bioengineering at Washington State University.
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Date Created: 09/17/15
Conventional Hydraulic Test Methods conl d 2 Modifications of Theis Equation by Cooper and Jacob For large t and small r values u is very small Wu 2 05772 lnu in 05772 and rS s Long 05772 68 41TT r2S As 05772 z In 178 and lnx 23 logx thus s ian ln178 Lini 411T r2S 411T 178 25 2 Q In 225 Tt 23Qlog 225 Tt 47TT r2S 41TT r2S 69 Eq 69 is applicable to i S vs t observed at a single obs well ii S vs r observed at differ wells at the same time A T imedrawdown method S vs 10g tyields a straight line 225 Tt s1 2393Qlog 1 610 4139ET r2S 225 Tt s2 23910 2 611 411T r25 23Q t1 s s 10 612 1 2 411T g t2 For logtllt2 1 drawdown per 10g cycle is As 613 411T 225 Tt Setting 5 log 0 0 411T rzs 225 Tt0 225 Tt0 1 gt S 615 r2S r2 to the time when the drawdown line hits 5 O Eq 613 gives T Eq 615 gives S 2 B Distancedrawdown method s vs log 1r2 also yields a straight line At time t distance r1 and r2 23Ql 225Tt s1 0g 4THT rlzs s2 23Qlog 225 Tt 411T 225 r 2 r sl sz 239m 23ng2 411T r12 211T r1 616 617 619 For logr2r1 1 drawdown per log cycle is As 2 23Q 2 T Setting s 3Qlog 23925 Tt 0 a TC 2 r0 S 620 225Tt z 1 2 S 225Tt r02S r02 r0 the distance when the drawdown hits S O 621 Eq 620 gives T Eq 621 gives S 3 Theim SteadyState Equation For confined aquifer Eq 619 or 620 is used to obtain T For unconfined aquifer K is computed using 139 1122 1112 2T3Ilog72 l Where hl and k2 are heads at r1 and r2 As t is not considered S cannot be obtained 4 HantushJacob leaky Aquifer Method s l W mi 623 411T B T i W mi 624 411s B s 4T 625 2 5 Neuman Solution for Water Table Aquifer s A WuAuBn 627 411T r2S u for earl t s data A 4Tt y 2 uB y for late t S data 4T t 2 accounting for vertical ow
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