Two rivers located 2000 m apart fully penetrate an aquifer (Figure below). The aquifer has a K value of 4.0 m/day. The region receives an average net recharge of 2*10-3 m/day as a result of rainfall and evaporation. Assume that the water elevation in River 1 is 26 m and the water elevation in River 2 is 14 m. Use the Dupuit equation with recharge, and determine the location of the water divide in m. Enter your answer with 1 decimal. ho hmax Water table hi

Two rivers located 2000 m apart fully penetrate an aquifer (Figure below). The aquifer has a K value of 4.0 m/day. The region receives an average net recharge of 2*10-3 m/day as a result of rainfall and evaporation. Assume that the water elevation in River 1 is 26 m and the water elevation in River 2 is 14 m. Use the Dupuit equation with recharge, and determine the location of the water divide in m. Enter your answer with 1 decimal. ho hmax Water table hi

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

Two rivers located 2000 m apart fully
penetrate an aquifer (Figure below). The
aquifer has a K value of 4.0 m/day. The
region receives an average net recharge of
2*10-3 m/day as a result of rainfall and
evaporation. Assume that the water elevation
in River 1 is 26 m and the water elevation in
River 2 is 14 m. Use the Dupuit equation with
recharge, and determine the location of the
water divide in m.
Enter your answer with 1 decimal.
ho
W
W
hmax
W
Water table
W
hi
DIII
V

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QUESTION 1 Calculate the transmissivity of an artesian aquifer that has a thickness of 5.5 m and is pumped at a rate of 1.52 m³/min. There are two observation wells located at 150 m and 280 m away with drawdowns of 0.8 and 0.72 m respectively. (15) QUESTION 2 An aquifer has T = 175 m²/day, S = 1.3 x104, and provides a flow of 20 L/s to a well. Find the drawdown at the two observation wells located 15 and 65 m from the producing well after 1 day, 2 months, 10 months and 2 years. (15)