A stream containing no biochemical O2 demand (obviously a hypothetical situation) has a DO of 5.00 mg/L and a flow rate of 8.70 m3/s.  The temperature of the stream is 15 degrees Celsius.  The average velocity in the stream is 0.174 m/s.  The average depth is 5 m.  Determine the reaeration coefficient and the rate of reaeration.

Q: has the dimensions of 16.0 m² (4 m by 4 m). At 22°C, the density of the oil is 913 kg m-3 and the…

A: given data,FINDi)verify boundary layer laminar or notii)thickness of boundary layer at 2m in the…

Q: What is the hydraulic retention time?  b. What would be concentration decay model along the relative…

A: a) Hydraulic detention timeThe hydraulic detention time (th) is given by th =VQ=3000 m3600m3day=5…

Q: Dissolved chloride in a concentration of 500 mg/L is being advected with flowing groundwater at a…

A:

Q: 1. A tank initially holds 10 gal of fresh water. At t 0, a brine solution containing 4 pounds of…

A:

Q: Z=0 Water Table Steady State Recharge 4.1 m Ground Surface 0 z (meters) 11 K (meters/day) 0.5 K(z) =…

A: Given data:Hydraulic conductivity, k(z)=0.5+0.03zPorosity, n=0.23Depth of unconfined aquifer=-11mWe…

Q: In an activated sludge treatment system, the BOD concentration decays according to first order…

A:

Q: There is a flood that takes place above the ground surface table up to 1.3 m in height. Assume the…

A: The soil comprises soil solids and void space.  The void space may be filled with water or air, or…

Q: A confined aquifer is pumped with a constant rate through abstraction well. There is a big lake of…

A: Confined aquifer- It is aquifer that completly saturated with water. Top and bottom both layers are…

Q: brine. tly to into the water table. The concentration of chloride in the be img/L. The flow in the…

A: In this question ,we have to find out Hydraulic gradient i from given data

Q: A settling tank (32 m long, 2.1 m across and 1.6 m deep) is used to clarify water containing…

A: width of tank=2.1m=210cmdepth of tank=1.6m=160cmdiameter of particles = 120 μm = 0.12 mm = 0.012…

Q: Assume the described is at steady state. A fluid goes up to an aquifer that has groundwater and a…

A: Volume of groundwater reservoir, Outflow, Chloride Concentration of fluid, Chloride outflow,

Q: A container of Atrazine (500 g) is dumped into a river 2.3 km upstream of a municipal water intake…

A: Given, M = 500 gm or 0.5 kg L = 2.3 km or 2300 m  A = 5.7 m2  Q = 8.25 m3/s D = 0.1 m2/s

Q: To clarify water containing particles with a diameter of 120 m, a settling tank (32 m long, 2.1 m…

A: Diameter of particle=120Tank dimentionLength=32mWidth=2.1mDepth=1.6mparticle density is 2.5…

Q: In a homogeneous unconfined aquifer of area 3.00 km², the water table was at an elevation of 102.00…

A:

Q: The flow net constructed for the dam is shown in the figure below. Taking the coefficient of…

A: Flow net for a dam is given- From the figure-Nf=no. of flow channels=3,Nd=No. of equipotential…

Q: Q3 - A WSP system is going to be designed for a new town that receives 10000+(Y×1000) m/d with…

A: i}  For effective removal of BOD and upto 99% pathogens (E.Colli}  we can arrange on design…

Q: Plot Xa and S/Sº vs Theta for So= 2000, 200, 20, and 2.

A: Given that :-Required that :-

Q: An oil of viscosity 9 poise is flowing through a horizontal pipe of 60 mm diameter. If the flow is…

A:

Q: For a system of heterogeneous, linear, and horizontal flow, and starting from the continuity…

A: Suppose a system is given below,

Q: Estimate the reduction in bacteria during the passage of wastewater that initially contains 106…

A: Initial Concentration = 106 org per ml V1 = 10000 m3 V2 = 20000 m3 V3 = 6000 m3 K = 0.1 per day Find…

Q: 1.25 m head of water is flowing over a 36-1m high spillway, hence, the percentage of energy…

A: He = 1.25m H = 36 + 1.25 = 37.25m C(coefficient of spillway discharge) = 2.6(assuming)  {vary from…

Q: Losses from lake A (left) feed lake B (right). The distance between them is 3.5 km. The water level…

A: The problem is about calculating the rate of flow in the pore between two lakes. The water level…

Q: The hydraulic conductivity of a homogeneous sandy/gravelly aquifer is 3 x 10-2 cm/sec. The…

A:

Q: 2.52. A water sample has been analyzed and found to have a BOD, (20°C) of 7.00 g/m³ and a reaction…

A:

Q: In a soil column study, a solute with a concentration of 1000 µg/mL is being pumped from the bottom…

A: To solve this problem, we need to use the advection-dispersion equation, which describes the…

Q: At 100°C of temperature, 3.5 atm vapour pressure of water is equivalent to: 1. 350.0000 kPa 2.…

A: Given data- Temperature T=100oCVapour pressure VP=3.5 atmTo Find-Vapour pressure of water Equivalent…

Q: If raw water having dynamic viscosity μ=0.001519N⋅s/m2   flows at rate of 30,000 m3/d into a rapid…

A: Rapid Mix Tank: A rapid mixing tank is used to treat the water by removing impurities in it. The raw…

Q: As shown in the figure compute the amount and location of the vertical and horizontal components of…

A: Given data,radius is 7.5mL=10mFINDAmount and location of vertical and horizontal component

Q: Fifty kilograms of toxic material is spilled uniformly across a canal. The canal is trapezoidal with…

A: Velocity, V = Q/A. V = 16/12.325 = 1.3 m/s  For after t= 2 hours of spill, t= 2*60*60 sec length of…

Q: A bio-tower composed of a modular plastic medium of 6 m is used as secondary treatment component in…

A: A bio-tower composed of a modular plastic medium of 6 m is used as a secondary treatment component…

Q: A stream has a cross-sectional area of ​​A= 85 m2, length L = 1000 m, velocity U=185 m/hour,…

A: Given area of the stream  A=85 m2 Area of the stream  A=85 m2and velocity of the stream U=185 m/hour…

Q: 1. The radial flow pump produces 0.8 m of frictional head losses within the pump. If 3.10 m of head…

A: Input head = 3.10mOutput head = 0.8mTo find:The pump efficiency

Q: certain liquid flows in a 10 mm diameter smooth pipe that is 20 m long. The total head lost in the…

A: Given Reynolds number Re=1800 <2000 so laminar flow so friction factor…

Q: Estimate the concentration of SOz in the urban air above city, if tthe mixing height above the city…

A: Given, Mixing height= h= 800 m Width of box perpendicular to the wind = w= 12000 m Average annual…

Q: A bio-tower composed of a modular plastic medium of 6 m is used as secondary treatment component in…

A: A bio-tower composed of a modular plastic medium of 6 m is used as a secondary treatment component…

Q: A waste water stream (flow=2 m³/s, ultimate BOD=90 mg/l) is joining a small river (flow=12 m³/s,…

A: Given- Waste water flow Qw=2 m3/s, BODw=90 mg/L, River flow QR=12 m3/s, BODR=5 mg/L, Area A=50 m2,…

Q: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

A: A settling chamber is to be used to collect particles with a density of 1200 kg/m3 from an air…

Q: 1. An oil of sp. gr. 0.9 is contained in a vessel. At a point the height of the oil is 50 m. Find…

A:

Q: A plug flow and a CFSTR biological reactor are both operating with an influent substrate…

A: Answer We need to calculate Volume of both the reactor first Volume of plug flow reactor is given by…

Q: From the Figure, Determine the following: 80 kN/m 20 KN/m 10 kN A -3 m 4m a. Reactions at the…

A:

Q: An oil of viscosity 0.02 Ns/m2 is flowing between two stationary parallel plates 1 m wide maintained…

A: Given data - Viscosity of oil = 0.02 Ns/m2 Distance between plates = 15 mm Velocity midway btw…

Q: Calculate the steady-state recharge rate, and find how long would it take for dissolved road salt to…

A: Given data: Hydraulic conductivity, k(z)=0.5+0.03z Porosity, n=0.23 Depth of unconfined aquifer=-11m…

Evaporation

This topic is majorly taught in various undergraduate and postgraduate degree courses of: