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Course Outline and Practical Details

Environmental Hydraulics

Environmental Hydraulics VVR N40

September – October 2019

Information about the course is available at:

http://www.tvrl.lth.se/utbildning/courses/VVRN40/

Course Structure: Lectures 32 hrPractical assignments 10 hrTutorials 10 hr

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Teachers

Professor Magnus Larson lectures and practical assignmentscourse coordinator

M.Sc. Almir Nunestutorials

To provide a fundamental understanding of the phenomena and processes that govern the water flow in the environment with the special purpose of providing the students with knowledge to analyze the conditions for and consequences of human activities.

Activities refer primarily to discharge of pollutants to different water bodies, but the interaction between structures and water flow is also discussed. A brief overview of basic sediment transport is included as well.

Course Objectives

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Practical Assignments

Three practical assignments (compulsory to pass the course):

• EH1. Design of an outfall with a diffuser for cooling water. Make an economic optimization of a tunnel and diffuser system for discharging cooling water from a power plant (October 11).

• EH2. Design of wastewater discharge from the city of Göteborg. Estimate the spreading and associated dilution of wastewater discharged in a density-stratified receiving water, where the conditions vary depending on the time of the year (October 18).

• EH3. Design of erosion protection in a river. Estimate sediment transport in a river and the impact on the morphology in order to develop suitable protection against erosion (November 1).

The assignments must finally be approved before the 15th of November.

The assignments may be carried out in groups of two students.

Tutorials

Five sessions are included in the course that focuses on solving problems in environmental hydraulics. The students are encouraged to work on the problems themselves beforehand and use the time for consulting the instructor on specific questions related to the problems.

Literature

The literature is available at the Water Resources Engineeringhome page and consists of:

Jönsson, L., Receiving Water Hydraulics.

Various excerpts from the literature:Woodroffe, C.D., Coasts: Form, Process, and Evolution, Cambridge University Press, 2002.Kvarnäs, H., Morphometry and Hydrology of the Four Large Lakes of Sweden, Ambio, 30(8), 467-474.McGinnis, D. and Wuest, A., Lake Hydrodynamics, McGraw-Hill Yearbook of Science & Technology, 2005.Komar, P.D., Beach Processes and Sedimentation, Prentice Hall, 1976.Layton, J.A., Design Procedures for Ocean Outfalls, Proceedings of the International Coastal Engineering

Conference, ASCE, 2919-2940, 1978.Åsell, B. and Liljeblad, Å. The Oxygen Conditions in Silverån downstream Silverdalens Paper Mill,

Swedish Environmental Research Institute (IVL), unpublished report, 1976 (in Swedish).Soulsby, R., Dynamics of Marine Sands, Thomas Telford, 1997.Schiereck, G.J., Introduction to Bed, Bank, and Shore Protection, Delft University Press, 2001.

Larson, M. Sample problems in environmental hydraulics

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Examination

A written examination will be given at the end of the course (1st of November 14-19 in Sparta C) consisting of two parts:

• one part involves six theoretical problems where only paper and pencilare allowed

• one part encompasses three sample problems to be solved withcollection of formulas

A sample problem yields maximum 2 points, whereas the theoreticalproblems give 1 point each. The maximum score is 12 points, of which 5are needed to pass the course, with the extra requirement that you have atleast 2 points on each part. The results from the written examination will bethe final grade of the course.

Office Hours

Various problems related to the course should be discussed withMagnus Larson (3rd floor in the Civil Engineering building).

Lectures (Part I)

Date Time Room Content

2.9 13-15 V:D Course overview and introduction to environmental hydraulics. Phenomena and processes.

2.9 15-17 E:C Receiving water types. Transport process and spreading of pollutants. Balance equation for water and pollutants.

9.9 10-12 KC:B Basic mechanisms for mixing. The general transport equation (advection-diffusion equation) – formulation

12.9 8-10 A:B The general transport equation – application to special cases (river flows, coastal areas; point sources, distributed sources)

12.9 10-12 A:B Turbulent jets; basic theory and models

16.9 13-15 V:A Buoyant jets and plumes; basic theory and models

19.9 8-10 V:D Stratified receiving waters. Case studies of pollution discharge and environmental impact. Diffusers and other technical solutions for pollution discharge

26.9 8-10 A:B Heat transport; basic equations and applications

26.9 10-12 A:B Oxygen transport; basic equations and applications

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Lectures (Part II)

Date Time Room Content

30.9 13-15 V:C Mechanisms for water exchange (wind, waves, tide, seiching)

7.10 10-12 KC:B Density currents and stratification. Field studies on receiving water quality

7.10 13-15 KC:B Basic sediment transport and boundary layer theory

10.10 8-10 V:D Bed load and suspended load. Commonly used sediment transport formulas

14.10 10-12 E:C Interaction between structures and natural flows

17.10 8-10 A:B Course summary

17.10 10-12 A:B Old examination problems

Tutorials

Date Time Room Sample Problems

9.9 13-15 V:R2 Balance equations for water and pollutants (box models)

16.9 10-12 V:R2 General transport equations

19.9 10-12 V:N1 Turbulent jets and plumes

30.9 10-12 V:R2 Heat and oxygen transport

10.10 10-12 V:N1 Density currents and sediment transport

(Solutions to the sample problems are distributed at the problem solving sessions or may be downloaded from the home page)

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Practical Assignments

Date Time Room Content

23.9 10-12 V:R2 EH113-15 V:R2 EH1

3.10 8-10 V:N1 EH210-12 V:Q1 EH2

14.10 13-15 V:R2 EH3