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  • Effectiveness of Soil/Spoil Amendments in Minimising Adverse Impacts of Runoff and Erosion at Coal Mine Rehabilitation Sites in the Bowen Basin Region, Central Queensland

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    Mahardhika_2012_02Thesis.pdf (3.134Mb)
    Author(s)
    Mahardhika, Hapsara
    Primary Supervisor
    Yu, Bofu
    Ghadiri, Hossein
    Year published
    2012
    Metadata
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    Abstract
    Effects of vegetation cover on runoff and soil loss reduction at mine rehabilitation sites are well documented. However, the knowledge of soil amendment applications, namely polyacrylamide (PAM) and gypsum, prior to the establishment of vegetation is still very limited. These soil amendment methods have proven to have the ability to improve soil surface stability in agriculture, however, the application of soil amendments to improve the spoil surface at mine rehabilitation sites is still un–trialled and their effectiveness largely unknown. This study covers 4 topics namely; (1) to analyse the effectiveness of soil amendments ...
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    Effects of vegetation cover on runoff and soil loss reduction at mine rehabilitation sites are well documented. However, the knowledge of soil amendment applications, namely polyacrylamide (PAM) and gypsum, prior to the establishment of vegetation is still very limited. These soil amendment methods have proven to have the ability to improve soil surface stability in agriculture, however, the application of soil amendments to improve the spoil surface at mine rehabilitation sites is still un–trialled and their effectiveness largely unknown. This study covers 4 topics namely; (1) to analyse the effectiveness of soil amendments towards improving the hydraulic conductivity of the soil and spoil; (2) to determine the effect of soil amendments application on sediment concentration in the runoff and total soil loss generated from the laboratory based soil erosion experiments; (3) to assess WinSEADS model (Soil Erosion and Deposition Simulation – Windows) to predict sediment concentration and total soil loss under a variety of scenarios; (4) to carry out cost assessment of possible field application of soil amendments under several scenarios. In the small–scale experiments, the application of soil amendments to the soil and spoil was found to be beneficial in increasing the hydraulic conductivity. The results indicate that gypsum is more effective in maintaining a high hydraulic conductivity when compared with PAM. The percentage increase of hydraulic conductivity was found to depend on the soil amendment application rates; and the physical and chemical characteristics of the soil and spoil.
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    Thesis Type
    Thesis (PhD Doctorate)
    Degree Program
    Doctor of Philosophy (PhD)
    School
    Griffith School of Engineering
    DOI
    https://doi.org/10.25904/1912/3746
    Copyright Statement
    The author owns the copyright in this thesis, unless stated otherwise.
    Item Access Status
    Public
    Subject
    Mine rehabilitation sites
    Soil amendments
    Soil improvement
    Soil erosion
    Griffith University Tilting Flume Simulation Rainfall (GUTSR)
    Abandoned mined lands reclamation
    Soil composition
    Publication URI
    http://hdl.handle.net/10072/367329
    Collection
    • Theses - Higher Degree by Research

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