Answer the following environmental engineering practice questions. QUESTION No. 1A confined aquifer 20.0 m thick has two monitoring wells spaced 500m apart along thedirection of groundwater flow. The difference in water level in the wells is 2.0m (thedifference in piezometric head). The hydraulic conductivity is 50m/day. Estimate the rateof flow per meter of distance perpendicular to the flow. Aquifer porosity is 0.2Suppose the aquifer becomes contaminated and the upgradient well is used as amonitoring well, whose purpose is to provide early detection of the approachingcontaminant plume, how long after the monitoring well is contaminated would thedrinking water from the second well become contaminated?QUESTION No. 2Consider a contaminant plume that is 200m wide x 20m thick x 1000m long. If d'Arcy'svelocity is 2.0 x 106 m/s and the aquifer porosity is 0.4, what minimum pumping ratewould assure full plume capture, and how far apart should two wells be placed foroptimal location and alignment along the leading edge of the plume? (10+ 15 marks)How long would it take to pump an amount of water equal to the volume of the watercontained in the plume?QUESTION No. 3A wastewater treatment plant serving a city of 600,000 persons discharges 4.0cu.m/s oftreated effluent having an ultimate BOD of 20.0mg/L into a stream that has a flow of10.0cu.m/s and a BOD of its own equal to 6.0mg/L. The deoxygenation constant, kis0.20/day. Assuming complete and instantaneous mixing, estimate the ultimate BOD ofthe river just downstream from the outfall.If the stream has a constant cross section, so that it flows at a fixed speed equal to0.50m/s, estimate the BOD remaining in the stream at a distance 43,200m downstream.GIVEN: L₁ = Loe-kdi

Since, this is a multiple-question type we are bound to solve only one question, in this case, the…

A confined aquifer 20.0 m thick has two monitoring wells spaced 500m apart along the direction of groundwater flow. The difference in water level in the wells is 2.0m (the difference in piezometric head). The hydraulic conductivity is 50m/day. Estimate the rate of flow per meter of distance perpendicular to the flow. Aquifer porosity is 0.2 Suppose the aquifer becomes contaminated and the upgradient well is used as a monitoring well, whose purpose is to provide early detection of the approaching contaminant plume, how long after the monitoring well is contaminated would the drinking water from the second well become contaminated?

A confined aquifer 20.0 m thick has two monitoring wells spaced 500m apart along the direction of groundwater flow. The difference in water level in the wells is 2.0m (the difference in piezometric head). The hydraulic conductivity is 50m/day. Estimate the rate of flow per meter of distance perpendicular to the flow. Aquifer porosity is 0.2 Suppose the aquifer becomes contaminated and the upgradient well is used as a monitoring well, whose purpose is to provide early detection of the approaching contaminant plume, how long after the monitoring well is contaminated would the drinking water from the second well become contaminated?

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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