Problem $5$:

A confined aquifer is influenced by a nearby river. The thickness of the aquifer is $15m$ and the hydraulic conductivity is $22m$ day. The river runs north$-$south. The well $0\mathrm{.}20m$ in diameter is located $0m$ north and $70m$ east of the river. The well is pumped at a rate of $15$ liters per second. Find the drawdown $($a$)$ at the well and $($b$)$ at a point $8m$ north and $20m$ west of the well $[10]$ Hint: The river represents a constant head boundary. Need an image well on the opposite side of the river and must use the proper equation. The dravdown at points of interest for part $($a$)$ and $($b$)$ needs to be calculated. The distances $r_1$ and $r_2$ must be calculated from the center of the real and image well to the point of interest, respectively. For part $($a$),$ to find the drawdown at the well, the points of interest can only be at the periphery of the well where ground water flow equation is applicable.

Problem $6$:

Repeat problem $5$ with the river replaced by a valley wall. The radius of influence of the well is $950m[10]$

Hint: The valley represents a no$-$flow boundary. An image well on the opposite side of the valley wall is need. Must use the proper equation The drawdown at points of interest for part $($a$)$ and $($b$)$ needs to be calculated. The distances $r_1$ and $r_2$ must be calculated from the center of the real and image well to the point of interest, respectively. For part $($a$),$ to find the drawdown at the well, the points of interest can only be at the periphery of the well where ground water flow equation is applicable.