Dr. SaMeH S. Ahmed

Associate Prof. of Environmental Engineering

Salinity


Salinity

Water salinity diagram.png


Salinity is the saltiness or dissolved salt content of a body of water. It is a general term used to describe the levels of different salts such as sodium chloridemagnesium and calcium sulfates, and bicarbonatesSalinity in Australian Englishand North American English may also refer to the salt content of soil (see soil salinity)

Definitions


Water salinity
Fresh water Brackish water Saline water Brine
< 0.05 % 0.05 – 3 % 3 – 5 % > 5 %
< 0.5 ‰ 0.5 – 30 ‰ 30 – 50 ‰ > 50 ‰

Salinity in the ocean refers to the water's "saltiness". In oceanography, it has been traditional to express salinity not as percent, but as permille (parts per thousand) (), which is approximately grams of salt per kilogram of solution. Other disciplines use chemical analyses of solutions, and thus salinity is frequently reported in mg/L or ppm (parts per million). Prior to 1978, salinity or halinity was expressed as Cl ‰, usually based on comparison with IAPSO Standard Seawater ("Copenhagen water"), a natural sea water distributed to serve as a world standard.[2] In 1978, oceanographers redefined salinity in the Practical Salinity Scale (PSS) as the conductivity ratio of a sea water sample to a standard KCl solution.[3][4] Although PSS is a dimensionless quantity, its "unit" is usually called PSU. It is not the case that a salinity of 35 exactly equals 35 grams of salt per liter of solution.[5]

These seemingly esoteric approaches to measuring and reporting salt concentrations may appear to obscure their practical use, but it must be remembered that salinity is the sum weight of many different elements within a given volume of water. It has always been the case that to get a precise salinity as a concentration and convert this to an amount of substance (sodium chloride, for instance) required knowing much more about the sample and the measurement than just the weight of the solids upon evaporation (one method of determining salinity). For example, volume is influenced by water temperature; and also the composition of the salts is not a constant (although generally very much the same throughout the world ocean). Saline waters from inland seas can have a composition that differs from that of the ocean. For the latter reason, these waters are termed saline as differentiated from ocean waters, where the term haline applies (although is not universally used).



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Mining Engineering


Mining engineering is an engineering discipline that involves practice, theory, science, technology, and the application of extracting and processing minerals from a naturally occurring environment. Mining engineering also includes processing minerals for additional value.

Environmental Engineering

Environmental engineers are the technical professionals who identify and design solutions for    environmental problems. Environmental engineers provide safe drinking water, treat and properly dispose of wastes, maintain air quality, control water pollution, and remediate sites contaminated due to spills or improper disposal of hazardous substances. They monitor the quality of the air, water, and land. And, they develop new and improved means to protect the environment.

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Course 2016/17-1


  1. Computer Applications in Surveying  CE 473
  2. Surveying 1 CE 370
  3. Photogrammetry CE 474
  4. Surveying II  CE 371
  5. Design I  (round 4) CE 498




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Member of the Editorial Board: " Journal of Water Resources and Ocean Sciences"  2013

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First midterm exam


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Computer Applications in Surveying

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2015-2016-2 - Photogrammetry  CE474




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Environmental Engineering 1



CE 360: Environmental Engineering 1

37-2

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Senior Design 2 - CE 499

Meeting on 14-4-2015

Second Best paper from Senior Design Projects in 2015

Paper title:

Evaluation of Groundwater Quality Parameters using Multivariate Statistics- a case Study of Majmaah, KSA

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Abdullah A. Alzeer

Husam K. Almubark

Maijd M. Almotairi

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Environmental Engineering I


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Civil and Environmental Engineering Department
College of Engineering, Majmaah University
Majmaah, P.O. 66, 11952, KSA

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Properties and Strength of Materials 1

CE 212

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Solution of Quiz 4 + Results HW


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Soil Mechanics and Foundation Engineering

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M2+ model Answer + PP 1-9 = PDF 1-9 all are available

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