P.S. # 6

Grismer Ch. 9 all

Serrano Ch. 5 #1

Grismer 1, 3, 5

1.

Aquifer - Water bearing strata that is economically developable

Aquitard - Very slowly permeable strata unsuitable for development as an aquifer

Aquiclude – Extremely low permeability layer with very small porosity

Aquifuge – Strata having no permeability due to lack of porosity

3.

S_ya = (V_d/A) / D t

V_d/A = Qt/A = q/t = (5 * 10-4 cm/s) (3 hrs) (3600 sec/hr)

= 5.4 cm

dD = 170 – 116 = 54 cm

S_ya = 5.4 / 54 = 10%

5.

Steady drainage well problem

w = 4 ft/yr = 0.011 ft/day

K = 200 ft/day

h_w = 10 ft

h_o = 30 ft

r_o = ?

r_w = 1 ft

r_o²[ln (r_o/r_w) – ½] = [K (h_o²/w)] (8/9) = [200 (30²/0.011] (8/9) = 14.6 * 10⁶

r_o²[ln (r_o) – ½] = 14.6 * 10⁶

trial and error

Serrano Ch. 5 # 1

1.

Horizontal avg K = å Kd / å d

= [(25 *0.45m) + (180 m * 2.2 m) + (48 * 1.3m ) + (110* 0.95 m)] / (0.45 + 2.2 + 1.3 + 0.95 ) =

= 574 / 4.9 = 117.2 m/month

Vertical avg K = å d / å d/K

= (4.9 m) / [(0.45 / 2.5) + (2.2 / 180) + (1.3 / 4.8) + (0.95 / 110)

= 4.6 / 0.066 = 74.3 m/ month