A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes

Carlos Muñoz-Robles, Matthew Tighe, Nick Reid, Paul Frazier, Sue Briggs, Brian Wilson

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Management of woody encroachment and pasture to reduce runoff and sediment production is important in semi-arid areas. However, the study of relationships between vegetation and surface hydrology at hillslope scale is difficult because of cost and time constraints. Up-scaling eco-hydrological responses measured at fine scale can overcome these constraints and provide insights into runoff and erosion at scales relevant to management. In this study, runoff and sediment production were modelled on two adjacent hillslopes, one with woody encroachment (3500 stems ha -1) and the other a volunteer pasture cultivated to oats 18 months previously. Spatial modelling was undertaken to integrate small-plot (1m2) rainfall simulation, slope and the spatial distribution of ground cover. The estimates of runoff and sediment production in the woody hillslope were considerably lower than in the pasture hillslope in both years of the study. Runoff and sediment production in the woody hillslope were similar in consecutive years, whereas the estimates of runoff and sediment production in the pasture hillslope were lower in the second year as a result of the establishment of a water spreading system of contour banks. The results showed the importance of measuring patchiness and connectivity of runoff source areas for runoff and sediment production. The spatial modelling approach allowed a description of fine-scale, surface eco-hydrological interactions on hillslopes, based on high resolution spatial data and experimental fine-scale rainfall simulations. A similar modelling approach could be used to explore runoff and sediment production resulting from varying management of semi-arid lands.
    Original languageEnglish
    Pages (from-to)83-93
    Number of pages11
    JournalEcohydrology
    Volume6
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    hillslope
    pasture
    runoff
    pastures
    sediments
    sediment
    methodology
    rainfall simulation
    modeling
    method
    rainfall
    hydrological response
    ground cover
    patchiness
    spatial data
    arid lands
    water management
    hydrology
    volunteers
    simulation

    Cite this

    Muñoz-Robles, Carlos ; Tighe, Matthew ; Reid, Nick ; Frazier, Paul ; Briggs, Sue ; Wilson, Brian. / A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes. In: Ecohydrology. 2013 ; Vol. 6. pp. 83-93.
    @article{fa3655d203984c939eaede27212796b1,
    title = "A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes",
    abstract = "Management of woody encroachment and pasture to reduce runoff and sediment production is important in semi-arid areas. However, the study of relationships between vegetation and surface hydrology at hillslope scale is difficult because of cost and time constraints. Up-scaling eco-hydrological responses measured at fine scale can overcome these constraints and provide insights into runoff and erosion at scales relevant to management. In this study, runoff and sediment production were modelled on two adjacent hillslopes, one with woody encroachment (3500 stems ha -1) and the other a volunteer pasture cultivated to oats 18 months previously. Spatial modelling was undertaken to integrate small-plot (1m2) rainfall simulation, slope and the spatial distribution of ground cover. The estimates of runoff and sediment production in the woody hillslope were considerably lower than in the pasture hillslope in both years of the study. Runoff and sediment production in the woody hillslope were similar in consecutive years, whereas the estimates of runoff and sediment production in the pasture hillslope were lower in the second year as a result of the establishment of a water spreading system of contour banks. The results showed the importance of measuring patchiness and connectivity of runoff source areas for runoff and sediment production. The spatial modelling approach allowed a description of fine-scale, surface eco-hydrological interactions on hillslopes, based on high resolution spatial data and experimental fine-scale rainfall simulations. A similar modelling approach could be used to explore runoff and sediment production resulting from varying management of semi-arid lands.",
    keywords = "contour banks, flow length, ground cover, hydrological connectivity, inter-patch, patchiness, Quickbird, resource retention, water spreading.",
    author = "Carlos Mu{\~n}oz-Robles and Matthew Tighe and Nick Reid and Paul Frazier and Sue Briggs and Brian Wilson",
    year = "2013",
    doi = "10.1002/eco.283",
    language = "English",
    volume = "6",
    pages = "83--93",
    journal = "Ecohydrology",
    issn = "1936-0584",
    publisher = "John Wiley & Sons",

    }

    A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes. / Muñoz-Robles, Carlos; Tighe, Matthew; Reid, Nick; Frazier, Paul; Briggs, Sue; Wilson, Brian.

    In: Ecohydrology, Vol. 6, 2013, p. 83-93.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - A two-step up-scaling method for mapping runoff and sediment production from pasture and woody encroachment on semi-arid hillslopes

    AU - Muñoz-Robles, Carlos

    AU - Tighe, Matthew

    AU - Reid, Nick

    AU - Frazier, Paul

    AU - Briggs, Sue

    AU - Wilson, Brian

    PY - 2013

    Y1 - 2013

    N2 - Management of woody encroachment and pasture to reduce runoff and sediment production is important in semi-arid areas. However, the study of relationships between vegetation and surface hydrology at hillslope scale is difficult because of cost and time constraints. Up-scaling eco-hydrological responses measured at fine scale can overcome these constraints and provide insights into runoff and erosion at scales relevant to management. In this study, runoff and sediment production were modelled on two adjacent hillslopes, one with woody encroachment (3500 stems ha -1) and the other a volunteer pasture cultivated to oats 18 months previously. Spatial modelling was undertaken to integrate small-plot (1m2) rainfall simulation, slope and the spatial distribution of ground cover. The estimates of runoff and sediment production in the woody hillslope were considerably lower than in the pasture hillslope in both years of the study. Runoff and sediment production in the woody hillslope were similar in consecutive years, whereas the estimates of runoff and sediment production in the pasture hillslope were lower in the second year as a result of the establishment of a water spreading system of contour banks. The results showed the importance of measuring patchiness and connectivity of runoff source areas for runoff and sediment production. The spatial modelling approach allowed a description of fine-scale, surface eco-hydrological interactions on hillslopes, based on high resolution spatial data and experimental fine-scale rainfall simulations. A similar modelling approach could be used to explore runoff and sediment production resulting from varying management of semi-arid lands.

    AB - Management of woody encroachment and pasture to reduce runoff and sediment production is important in semi-arid areas. However, the study of relationships between vegetation and surface hydrology at hillslope scale is difficult because of cost and time constraints. Up-scaling eco-hydrological responses measured at fine scale can overcome these constraints and provide insights into runoff and erosion at scales relevant to management. In this study, runoff and sediment production were modelled on two adjacent hillslopes, one with woody encroachment (3500 stems ha -1) and the other a volunteer pasture cultivated to oats 18 months previously. Spatial modelling was undertaken to integrate small-plot (1m2) rainfall simulation, slope and the spatial distribution of ground cover. The estimates of runoff and sediment production in the woody hillslope were considerably lower than in the pasture hillslope in both years of the study. Runoff and sediment production in the woody hillslope were similar in consecutive years, whereas the estimates of runoff and sediment production in the pasture hillslope were lower in the second year as a result of the establishment of a water spreading system of contour banks. The results showed the importance of measuring patchiness and connectivity of runoff source areas for runoff and sediment production. The spatial modelling approach allowed a description of fine-scale, surface eco-hydrological interactions on hillslopes, based on high resolution spatial data and experimental fine-scale rainfall simulations. A similar modelling approach could be used to explore runoff and sediment production resulting from varying management of semi-arid lands.

    KW - contour banks

    KW - flow length

    KW - ground cover

    KW - hydrological connectivity

    KW - inter-patch

    KW - patchiness

    KW - Quickbird

    KW - resource retention

    KW - water spreading.

    U2 - 10.1002/eco.283

    DO - 10.1002/eco.283

    M3 - Article

    VL - 6

    SP - 83

    EP - 93

    JO - Ecohydrology

    JF - Ecohydrology

    SN - 1936-0584

    ER -