What Is Soil Pollution? [pic] What Is Soil Pollution? Soil pollution results from the build up of contaminants‚ toxic compounds‚ radioactive materials‚ salts‚ chemicals and cancer-causing agents. The most common soil pollutants are hydrocarbons‚ heavy metals (cadmium‚ lead‚ chromium‚ copper‚ zinc‚ mercury and arsenic)‚ herbicides‚ pesticides‚ oils‚ tars‚ PCBs and dioxins. Until the 1970s‚ there was little talk of soil pollution and its devastating effects. In the 1980s‚ the U.S. Superfund was
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2/26/2013 SOIL MECHANICS 1 KAEA 2132 - Phase diagram & phase relationship - Soil-Aggregate Basic Relationship Dr. Meldi Suhatril Department of Civil Engineering‚ Faculty of Engineering‚ University of Malaya. Review : o Soil is inherently multiphase material (Generally consists of three phases) i. Solid phase ii. Liquid phase iii. Gaseous phase 3 – Phase system: AIR WATER Vv Va Vw Vs Wa= 0 Ww Ws = o It can also be TWO PHASE material i. With solid + Gaseous (DRY STATE)
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LANDSLIDES Introduction The term ‘landslide’ includes all varieties of mass movements of hill slopes and can be defined as the downward and outward movement of slope forming materials composed of rocks‚ soils‚ artificial fills or combination of all these materials along surfaces of separation by falling‚ sliding and flowing‚ either slowly or quickly from one place to another. Although the landslides are primarily associated with mountainous terrains‚ these can also occur in areas where an activity
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CE 353 Geotechnical Engineering Dr M. Touahmia 6 Soil Compaction Lecture Outline: 1. 2. 3. 4. 5. 6. 7. General Principles Standard Proctor Test Factors Affecting Compaction Modified Proctor Test Field Compaction Measurement of Field Compaction Special Compaction Techniques Textbook: Braja M. Das‚ "Principles of Geotechnical Engineering"‚ 7th E. (Chapter 6). 1 General Principles What is compaction? • Many types of earth construction‚ such as roads‚ railways
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Factors that Affect Soil Nutrients Nutrient availability can be influenced by several factors and these include: 1. Soil Ph: The relative concentration of the hydrogen irons and or hydroxyl irons may either increase or decrease nutrient availability. 2. The Presence of Other Nutrients: The essence of the various mineral salts will either increase or decrease the other mineral salts in the soil. 3. Leaching: This encourages the draining of mineral salts from the topsoil to subsoil thereby depriving
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“An Essay Explaining the Biochemical Processes that Occur During Decomposition in the Soil Using Organisms such as Bacteria‚ Fungi and Algae. It also Involves an Analysis of the Chemical Reactions Facilitated‚ Processes Involved‚ Mineralization and the Role(s) of Organic and Inorganic Compounds.” by Alicea Bigby-Smart ID #: 12480025 Montego Bay Community College Submitted in Partial Fulfillment of the Requirements of the Council of Community
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SOIL NAILING FOR STABILIZATION OF SLOPES Abstract: After its development in early 1980’s it become widely used in method of providing permanent and temporary support for earth‚ and stabilization of slope on many engineering projects in world wide. In starting of this period soil nailing was only performed on that project where geotechnical contractor provide this as an alternative to other soil improvements techniques. Now a days soil nailing is accepted only because of its performance and effectiveness
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How to Prevent Soil Erosion TERRACING Terrace farming is a farming method that makes use of a hill to create a multiplatform farm. There are severals steps known as andenes which are built into the side of a hill. The idea behind it is that any rain that falls and builds up on the andenes will overflow into another andene below‚ making the most out of the nutrients it provides. CROP ROTATION The successive planting of different crops on the same land to improve soil fertility and help
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1. Black soils The principal region of black soils is the Deccan plateau and its periphery extending from 8°45’to 26o north latitude and 68o to 83o45’ east longitude. They are formed from Deccan basalt trap rocks and occur in areas under the monsoon climate‚ mostly of semi-arid and sub-humid types. The overall climate of black soil region may be described as hot and dry summer‚ 40-100 cm rainfall per annum‚ mild to moderate winters and annual temperature ranges from 24-30o centigrade‚ mean maximum
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NAME: Joe Curtis MODULE: Agro- Environ. Systems Submission date: 22/10/2010 Semester: Fall 2010 Title: How soil management can affect soil quality Introduction Three Labs 1‚ 2 & 3‚ compared three agricultural fields with different soil management histories‚ trying to find out how these different soil managements affected the measured soil parameters. The three different soil management histories are given below: a. Corn field: tilled every year after corn harvest and left bare
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