As acid sulfate soils become oxidised with exposure to air, iron-minerals are produced and precipitate at the surface. Remote sensing can provide a useful tool for detection of these soils and monitoring of their disturbance. Drainage and disturbance of coastal lands can result in acid soil degradation and the release of sulfuric acid and toxic metals into coastal waters. Remote sensing of acid sulfate soils using multispectral and gamma-ray dataĪcid sulfate soils are a significant environmental problem in coastal regions of Australia. Copyright (1998) Remote Sensing and Photogrammetry Association of Australasia Ltd This study demonstrates the effectiveness of gamma-ray remote sensing for directly mapping soil units and properties (authors). In areas of granodiorite, K patterns are interpreted to be a function of the degree of mineral weathering and can be related to soil depth and erosion status. The precise origin of these soils is not clear and their parent materials may include contributions from aeolian deposition, in situ weathering of granodiorite, and remnant basalt. Many areas of deep red soils are accurately mapped by the radiometric K data. The work focuses mainly on the variation of soil properties within areas mapped as granodiorite lithology. Detailed soil and rock chemistry together with ground gamma-spectrometer measurements were collected to support the interpretation and analysis of the image data. A technique for removing this effect in the gamma-ray data is demonstrated. Effects of vegetation are evident in gamma-ray data and in Landsat TM along powerlines and in clearings. In this paper, images of gamma parent elements (K, Th and U) are presented and element associations with soil properties and vegetation are analysed for a forested area near Batlow, NSW. They are emitted from radioactive elements in the soil and largely pass through vegetation cover. Short wavelength gamma-rays are detected from the upper 0.30-0.45 m of the soil. Airborne gamma-ray remote sensing is presented here as a useful technique for soils. In forested and agricultural areas, reflective remote sensing methods are of limited utility for soil studies due to the variable effects of vegetation. ![]() International Nuclear Information System (INIS)īierwirth, P.N. to access from local ERP if you have.Gamma-ray remote sensing of soil properties in a forested area near Batlow, NSW Allows for plugins, There is a bank of plugins inside the website.Supports 34 languages(Left to right and right to left).Allows user self-registration,(good for opensources).Supports a range of SCM integration, including (SVN, CVS, Git, Mercurial, Bazaar and Darcs).Includes custom fields for issues, time-entries, projects and users. ![]()
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