Studying reach-scale spatial hydrology in ungauged catchments

J Callow, Guy Boggs

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Dryland regions are home to some of the most poorly gauged rivers on Earth. Consequently, these regions lack a detailed understanding of the hydrology, are associated with underdevelopment and significant socio-economic disadvantage, though there is increasing pressure to develop the water resources in these areas. However, this is often limited by a lack of data from which to understand regional hydrology and water-dependent processes and make informed water resource management decisions. This paper presents a novel approach to directly map, from remotely sensed imagery, the five flow types and six hydrological metrics defined as the most significant determinants of ecological condition of dryland rivers (Flow (duration of flow), Amplitude (last maximum depth), Pulse Shape (duration of rising limb and falling limb), Duration (present length of inundation), Connection (duration of present downstream connection)).At fourteen "virtual" gauging stations in two rivers (Newcastle Creek and Playford River) on the Barkly Tablelands, northern Australia, daily classified Moderate Resolution Imaging Spectroradiometer (MODIS) imagery was used to map flow types and metrics at 250m resolution, across 1996km2. The performance of the "virtual" gauging stations is validated against traditionally gauged data at two locations and confirms that hydrological data significant for ecology can be extracted from daily flood mapping using remotely sensed MODIS imagery. Results found a pronounced downstream trend in flow characteristics from more ephemeral uplands to seasonally-inundated lowlands. Significant between reach variability in the Duration and Connection is also noted, which is related to cross section morphology and river position. It is suggested that this approach could be applied to other poorly or ungauged large, dryland rivers, where the requirements, including limited cloud cover, long (weeks to months) flood pulses, inundation widths of greater than 2km, and lateral floodplain gradients of less than approximately 0.005m/m are met. This novel approach for the measurement of ungauged basins offers significant potential to allow research relevant to hydrology and water-dependent processes where traditional approaches to dryland river hydrology are limited by the lack of gauging infrastructure, or by complex multi-channel and low-gradient geomorphology. � 2013 Elsevier B.V.
    Original languageEnglish
    Pages (from-to)31-46
    Number of pages16
    JournalJournal of Hydrology
    Volume496
    DOIs
    Publication statusPublished - 2013

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    hydrology
    catchment
    river
    imagery
    MODIS
    limb
    underdevelopment
    cloud cover
    geomorphology
    floodplain
    cross section
    water resource
    infrastructure
    ecology
    water
    basin
    station

    Cite this

    Callow, J ; Boggs, Guy. / Studying reach-scale spatial hydrology in ungauged catchments. In: Journal of Hydrology. 2013 ; Vol. 496. pp. 31-46.
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    abstract = "Dryland regions are home to some of the most poorly gauged rivers on Earth. Consequently, these regions lack a detailed understanding of the hydrology, are associated with underdevelopment and significant socio-economic disadvantage, though there is increasing pressure to develop the water resources in these areas. However, this is often limited by a lack of data from which to understand regional hydrology and water-dependent processes and make informed water resource management decisions. This paper presents a novel approach to directly map, from remotely sensed imagery, the five flow types and six hydrological metrics defined as the most significant determinants of ecological condition of dryland rivers (Flow (duration of flow), Amplitude (last maximum depth), Pulse Shape (duration of rising limb and falling limb), Duration (present length of inundation), Connection (duration of present downstream connection)).At fourteen {"}virtual{"} gauging stations in two rivers (Newcastle Creek and Playford River) on the Barkly Tablelands, northern Australia, daily classified Moderate Resolution Imaging Spectroradiometer (MODIS) imagery was used to map flow types and metrics at 250m resolution, across 1996km2. The performance of the {"}virtual{"} gauging stations is validated against traditionally gauged data at two locations and confirms that hydrological data significant for ecology can be extracted from daily flood mapping using remotely sensed MODIS imagery. Results found a pronounced downstream trend in flow characteristics from more ephemeral uplands to seasonally-inundated lowlands. Significant between reach variability in the Duration and Connection is also noted, which is related to cross section morphology and river position. It is suggested that this approach could be applied to other poorly or ungauged large, dryland rivers, where the requirements, including limited cloud cover, long (weeks to months) flood pulses, inundation widths of greater than 2km, and lateral floodplain gradients of less than approximately 0.005m/m are met. This novel approach for the measurement of ungauged basins offers significant potential to allow research relevant to hydrology and water-dependent processes where traditional approaches to dryland river hydrology are limited by the lack of gauging infrastructure, or by complex multi-channel and low-gradient geomorphology. � 2013 Elsevier B.V.",
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    Studying reach-scale spatial hydrology in ungauged catchments. / Callow, J; Boggs, Guy.

    In: Journal of Hydrology, Vol. 496, 2013, p. 31-46.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Studying reach-scale spatial hydrology in ungauged catchments

    AU - Callow, J

    AU - Boggs, Guy

    PY - 2013

    Y1 - 2013

    N2 - Dryland regions are home to some of the most poorly gauged rivers on Earth. Consequently, these regions lack a detailed understanding of the hydrology, are associated with underdevelopment and significant socio-economic disadvantage, though there is increasing pressure to develop the water resources in these areas. However, this is often limited by a lack of data from which to understand regional hydrology and water-dependent processes and make informed water resource management decisions. This paper presents a novel approach to directly map, from remotely sensed imagery, the five flow types and six hydrological metrics defined as the most significant determinants of ecological condition of dryland rivers (Flow (duration of flow), Amplitude (last maximum depth), Pulse Shape (duration of rising limb and falling limb), Duration (present length of inundation), Connection (duration of present downstream connection)).At fourteen "virtual" gauging stations in two rivers (Newcastle Creek and Playford River) on the Barkly Tablelands, northern Australia, daily classified Moderate Resolution Imaging Spectroradiometer (MODIS) imagery was used to map flow types and metrics at 250m resolution, across 1996km2. The performance of the "virtual" gauging stations is validated against traditionally gauged data at two locations and confirms that hydrological data significant for ecology can be extracted from daily flood mapping using remotely sensed MODIS imagery. Results found a pronounced downstream trend in flow characteristics from more ephemeral uplands to seasonally-inundated lowlands. Significant between reach variability in the Duration and Connection is also noted, which is related to cross section morphology and river position. It is suggested that this approach could be applied to other poorly or ungauged large, dryland rivers, where the requirements, including limited cloud cover, long (weeks to months) flood pulses, inundation widths of greater than 2km, and lateral floodplain gradients of less than approximately 0.005m/m are met. This novel approach for the measurement of ungauged basins offers significant potential to allow research relevant to hydrology and water-dependent processes where traditional approaches to dryland river hydrology are limited by the lack of gauging infrastructure, or by complex multi-channel and low-gradient geomorphology. � 2013 Elsevier B.V.

    AB - Dryland regions are home to some of the most poorly gauged rivers on Earth. Consequently, these regions lack a detailed understanding of the hydrology, are associated with underdevelopment and significant socio-economic disadvantage, though there is increasing pressure to develop the water resources in these areas. However, this is often limited by a lack of data from which to understand regional hydrology and water-dependent processes and make informed water resource management decisions. This paper presents a novel approach to directly map, from remotely sensed imagery, the five flow types and six hydrological metrics defined as the most significant determinants of ecological condition of dryland rivers (Flow (duration of flow), Amplitude (last maximum depth), Pulse Shape (duration of rising limb and falling limb), Duration (present length of inundation), Connection (duration of present downstream connection)).At fourteen "virtual" gauging stations in two rivers (Newcastle Creek and Playford River) on the Barkly Tablelands, northern Australia, daily classified Moderate Resolution Imaging Spectroradiometer (MODIS) imagery was used to map flow types and metrics at 250m resolution, across 1996km2. The performance of the "virtual" gauging stations is validated against traditionally gauged data at two locations and confirms that hydrological data significant for ecology can be extracted from daily flood mapping using remotely sensed MODIS imagery. Results found a pronounced downstream trend in flow characteristics from more ephemeral uplands to seasonally-inundated lowlands. Significant between reach variability in the Duration and Connection is also noted, which is related to cross section morphology and river position. It is suggested that this approach could be applied to other poorly or ungauged large, dryland rivers, where the requirements, including limited cloud cover, long (weeks to months) flood pulses, inundation widths of greater than 2km, and lateral floodplain gradients of less than approximately 0.005m/m are met. This novel approach for the measurement of ungauged basins offers significant potential to allow research relevant to hydrology and water-dependent processes where traditional approaches to dryland river hydrology are limited by the lack of gauging infrastructure, or by complex multi-channel and low-gradient geomorphology. � 2013 Elsevier B.V.

    KW - Cross-section morphology

    KW - Dryland rivers

    KW - Flood hydrology

    KW - Moderate resolution imaging spectroradiometer

    KW - MODIS

    KW - Remotely sensed imagery

    KW - Traditional approaches

    KW - Waterresource management

    KW - Catchments

    KW - Ecology

    KW - Floods

    KW - Radiometers

    KW - Remote sensing

    KW - Satellite imagery

    KW - Water management

    KW - Rivers

    KW - catchment

    KW - data set

    KW - flood

    KW - floodplain

    KW - fluvial geomorphology

    KW - imagery

    KW - map

    KW - river flow

    KW - socioeconomic impact

    KW - spatial analysis

    KW - underdevelopment

    KW - water

    KW - water resource

    KW - Australia

    KW - Newcastle Creek

    KW - Northern Territory

    KW - Playford River

    U2 - 10.1016/j.jhydrol.2013.05.030

    DO - 10.1016/j.jhydrol.2013.05.030

    M3 - Article

    VL - 496

    SP - 31

    EP - 46

    JO - Journal of Hydrology

    JF - Journal of Hydrology

    SN - 0022-1694

    ER -