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Wednesday, July 22, 2020 | History

1 edition of Constraints imposed by acid sulfate soils on the Gambia"s bridge-barrage scheme found in the catalog.

Constraints imposed by acid sulfate soils on the Gambia"s bridge-barrage scheme

Raymond Colley

Constraints imposed by acid sulfate soils on the Gambia"s bridge-barrage scheme

by Raymond Colley

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Published by Great Lakes and Marine Waters Center, University of Michigan in Ann Arbor, Mich .
Written in English

  • Acid sulphate soils,
  • Soil acidification,
  • Barrages

  • Edition Notes

    Statementby Raymond Colley
    SeriesInternational Programs report -- no. 5
    ContributionsUniversity of Michigan. Great Lakes and Marine Waters Center
    The Physical Object
    Paginationiii, 33 p. :
    Number of Pages33
    ID Numbers
    Open LibraryOL25529952M

    Sulfide oxidation in some acid sulfate soil materials Nicholas John Ward Southern Cross University [email protected] is an electronic repository administered by Southern Cross University Library. Its goal is to capture and preserve the intellectual. Search the catalogue for collection items held by the National Library of Australia New Search eResources User Lists Feedback Help Collection Delivery Times Visitor Update: COVID Ask a Librarian Due to the need to contain the spread of coronavirus (COVID) the Library building and reading rooms are closed to visitors until further notice.

    This article throws light upon the three major types of problematic soils. The types are: 1. Acidic Soil 2. Alkaline Soil 3. Saline Soil. Problematic Soils: Type # 1. Acid Soils: The soils with pH less than and which respond to liming may be considered as acidic soils. (a) . ELSEVIER Geoderma 69 () GE()I)E~ Interpretation of soil features produced by ancient and modem processes in degraded landscapes: V. Development of saline sulfidic features in non-tidal seepage areas R.W. Fitzpatrick a,b, E. Fritsch 1,c, P.G. Self a " CSIRO, Division of Soils, Private Bag No. 2, Glen Osmond, S.A. , Australia b Cooperative Research Centre for Soil Cited by:

    The acidity or alkalinity regimes of soils in China follow the rule of “acid in the south, alkaline in the north”. Generally speaking, soils in the south of Yangtse River (33 o north latitude) are acidic (pH ) or strongly acidic (pH. Where an Acid Sulfate Soils Management Plan is considered adequate during the assessment process and in order to minimise the actual or potential impact to the environment arising from disturbance to acid sulfate soils, any dredging works approved must be carried out in accordance with the Acid Sulfate Soils Management Plan.

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Constraints imposed by acid sulfate soils on the Gambia"s bridge-barrage scheme by Raymond Colley Download PDF EPUB FB2

Non acid sulfate soils are in grey font type. The soil marked *, while not acid sulfate, has pH resulting from oxidation of sulfides.

RICE POLDERS IN THE ACID SULFATE SOILS OF THE BOLANHAS IN THE MANGROVES OF GUINEA-BISSAU R.J. Oosterbaan and J. Vos Published in Annual Report International Institute for Land Reclamation and Improvement (ILR) Wageningen, The Netherlands On website public domain, latest upload Table of contents 1.

ated with a steep gradient in the soil salinity but not with any con- spicuous drop in soil pH. Although the soils are potential acid sulphate, goils, in the natural conditions prior to the recent climatic drying' - - trend, the field pH of soils always exceeded in the central tanne +.r-- _.

Acid sulfate so ils (ASS) is the nam e given to all those soils contain ing soil materia ls with sulfide minerals or affe cted by tr ansform ation s of ir on su lfide m inerals. These soils m ay. This paper discusses the introduction of subsurface drainage as a tool to improve rice production in low land areas of acid sulphate soils.

Pipe drains with 15 and 30 m spacing were installed in farmers’ fields in coastal lowlands of Kerala, India, at Kuttanad. Soil conditions improved within 2 years after the introduction of the subsurface drainage and significantly Cited by: 1.

of the river. Soils in the Lower River valley up to eastern limit of salt water flow are either affected by salinity or are under the influence of the potential acid sulfate condition.

Soils outside the real delta and its tidal influence can only be used for rice cultivation during the rainy season when the fresh water flush pushes downFile Size: KB. Proper utilization and a melioration of these soil constraints remain an important problem in agricultural production.

One of these soil constraints is acid soil infertility. In research literatures concerning general properties of soils in this region some data on soil pH have been reported previously Zhao et al.,Yu, However, the Cited by: distinctive soil types and properties. Acid sulfate soils are present in most soil-landscape categories and contain the following range of materials: (i) monosulfidic materials in wet drains, (ii) sulfuric materials (pH.

Identification and investigation of acid sulfate soils and acidic landscapes (June ) i This guideline may be applicable to decisionmaking authorities, proponents, - consultants and other interested parties involved in the planning, development and use of areas potentially containing acid sulfate soils.

The Department of EnvironmentFile Size: KB. Geotechnical Aspects of Buildings on Expansive Soils in Kibaha, Tanzania v LIST OF FIGURES Figure Cross-section of a building (superstructure and substructure) 2 Figure Crack patterns and heaving resulting from centre heave or doming 3.

Phase 2 Acid Sulfate Soil Assessment, Ukee Boat Club wetland v EXECUTIVE SUMMARY An initial Phase 1 acid sulfate soil investigation of the Ukee Boat Club wetland in February showed acid sulfate soils to be a priority concern within this wetland complex.

Based on. The relationship between ECe and soil texture showed that as silt content increases salinity directly increases also. Most of the salt-affected soils in Middle Awash Valley have high silt content.

Chemical Characteristics. Soil organic matter, CEC and Exchangeable Cations. The soil organic matter varied from to %. Phase 2 Acid Sulfate Soil Assessment, Swanport wetland v EXECUTIVE SUMMARY An initial Phase 1 acid sulfate soil investigation of the Swanport wetland in August (WL samples) and January (SPM samples) showed acid sulfate soils to be a priority concern within this wetland complex.

Acid sulfate soils are those soils containing iron sulfide minerals (e.g. Pons ; Fanning ) that form naturally when sulfate in the water is converted to sulfide by bacteria. These soils may either contain sulfuric acid (sulfuric material), or have the potential to form sulfuric acid.

Thus, a potential acid sulfate soil becomes an actual acid sulfate soil. The acidification promotes the release of various (heavy) metals, restricts nutrient supply and corrodes steel and concrete structures.

The released metals and acidity are exported in various forms to adjacent waterways, endangering aquatic life. investigate and record the presence of acid sulfate soils at the nine wetlands.

In addition an assessment of tree health was undertaken at these wetlands using the method documented in Tucker (). The vegetation survey also collected information in regard to possible vegetation indicators of acid sulfate soils. Regional significance Table Acid sulfate soil types, map symbol1, Australian Soil Classification2, Soil Taxonomy3, World Reference Base4, Risk Class, Treatment categories5 and aerial extent for Gulf St Vincent.

Modified from (Fitzpatrick et al. d) Acid sulfate soil typeFile Size: 1MB. TOWARDS SUSTAINABLE LANDUSE WITHIN ACID SULFATE SOIL LANDSCAPES: A Case Study on the Maria River, New South Wales Australia. By Thor Aasø Hebegatan 3 59 Göteborg @ Supervisor: Christer Kalén Plant Ecology Lund University Sweden Telephone: Fax: Email:.

Take extra care when excavating foundations in clay soils, especially if there are trees nearby. Clay soils are made up of 40% water, but trees can change this amount differently throughout the year - causing the soil to shrink or swell with enough force to affect the foundations of a building and so it's vital that the foundation is the right depth to prevent movement.

Diverse soil management methods used by farmers in Arumeru to address diverse constraints all aimed at soil productivity improvement, agrodiversity enhancement and conservation are considered. Crop production levels in Tanzania are generally below potential, averaging about kg/ha maize and kg/ha for beans (FAO Year Book, ).

Soil Fertility Evaluation/Advisory Service in Negara Brunei Darussalam Report – Acid Sulfate Soils Page vi due to greenhouse gas emissions from the release of fossil carbon currently stored in the soils. The most effective management of ASS to minimise risk is avoidance, i.e. do not develop ASS.Soil pH ( soil/water) and in M CaC12 ( soil/solution) was determined weekly in water In both, cultivated and non cultivated soils, the electrical conducti\it>- was taken only before soil incubation and at the end of experimentation.

Soil pH achieved the equilibrium after six weeks in the Haplorthox and eight weeks in the Hapludult.Actual acid sulfate soils When PASS are disturbed or exposed to oxygen, the iron sulfides are oxidised to produce sulfuric acid and the soil becomes strongly acidic (usually below pH 4).

These soils are then called actual acid sulfate soils (AASS)—that is, they are already acidic. Actual acid sulfate soils: • have a pH of less than 4;File Size: KB.