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    Soil properties affecting tunnel-gully erosion

    Miller, Donald E. K.
    Abstract
    An area badly affected by tunnel-gully erosion was selected on the Port Hills, Christchurch, and sampled at several profiles. Recognised methods were used to determine the degree of clay dispersion caused by high exchangeable sodium levels, and techniques were devised to measure the swelling and slaking properties of the soil. The results obtained indicate that while both dispersion and slaking are the probable causes of aggregate breakdown, cracking resulting from desiccation of the soil is a major factor in the initiation of tunnel-gully erosion.
    Keywords
    tunnel-gully erosion; erosion; soil chemistry; soil properties; soil physical properties
    Fields of Research
    050302 Land Capability and Soil Degradation; 050305 Soil Physics
    Date
    1971
    Type
    Thesis
    Access Rights
    Digital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library.
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    • Theses and Dissertations with Restricted Access [2207]
    • Department of Soil and Physical Sciences [418]
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