Roles of land use resolution and unit-area load rates in assessment of diffuse nutrient emissions

Baginska, Barbara; Pritchard, Tim; Krogh, Martin

doi:10.1016/s0301-4797(03)00112-9

Cited by 26 publications

(36 citation statements)

References 10 publications

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“…Geomorphology of the reach strongly influences the nature of sediments introduced into the stream via runoff events (Baginska et al, 2003;Bond, 2004). Deposition of sediments may become harmful to mussels at elevated levels (Box and Mossa, 1999), a situation that may occur upstream of the weir wall.…”

Section: Discussionmentioning

confidence: 99%

The impact of small and large impoundments on freshwater mussel distribution in the Hawkesbury‐Nepean River, southeastern Australia

Brainwood¹,

Burgin²,

Byrne³

2008

River Research & Apps

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The influence of weirs on the distribution of freshwater mussels was investigated in the Hawkesbury-Nepean River, Australia. Distribution of species and densities of size classes were strongly correlated with catchment level factors (e.g. location around a major impoundment, stream order). At catchment scale, weir height, presence of a fish barrier, fish ladder type and position above or below small weirs did not influence the presence/absence of mussel populations. Lower mussel densities in the upper catchment may therefore reflect inhibition of host fish migration.Where present, weir height and geomorphic reach type were linked to differences in densities among species. Geomorphic reach-based differences were reflected by the Hyridella species, but not Velesunio ambiguus. When population structure was described by size class distribution, there were significant differences between densities of small and medium mussels from weirs above, compared to weirs below, a major impoundment, but not for large mussels. Upstream populations may therefore be functionally extinct. Distribution of mussel size classes differed among geomorphic reach types with highest densities for each class found in the least human-impacted reaches. Small mussels were almost invariably found below the major impoundment, most frequently below weirs.Distribution patterns were inconsistent across species, suggesting habitat preference. V. ambiguus and Hyridella australis were most abundant in shale reaches, where assemblages were influenced by fish ladder type. Hyridella depressa and H. australis dominated in sandstone gorges and straights with assemblage density related to weir height. In upper catchment sandstone reaches, mussel assemblages comprising predominantly V. ambiguus were influenced by fish ladder type and weir height.While multiple factors defined localized distribution, large impoundments were linked with reduced population densities. The probable mechanism is the restriction of host fish movement and resulting lack of recruitment. In the Hawkesbury-Nepean River, smaller weirs also seriously impacted recruitment.

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Section: Discussionmentioning

confidence: 99%

The impact of small and large impoundments on freshwater mussel distribution in the Hawkesbury‐Nepean River, southeastern Australia

Brainwood¹,

Burgin²,

Byrne³

2008

River Research & Apps

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“…Due to a large number of urban and peri-urban activities the HNR catchment presents some particular challenges in terms of water quality and health of the HNR system. Currently land use in the catchment includes heavily urbanised, industrial, recreational, agricultural and scenically attractive regions (Baginska et al 2003 ). There are numerous point and diffuse sources of anthropogenic pollution which primarily originate from peri-urban agriculture, sewerage treatment plants, sand and gravel mining and industrial activities.…”

Section: The Hawkesbury-nepean River Systemmentioning

confidence: 99%

Sustainability of Water Resources in Peri-Urban Landscapes: Learning from the Journey of Engagement

Rozzoli¹,

Maheshwari

2016

Balanced Urban Development: Options and Strategies for Liveable Cities

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Water is vital to sustainability and liveability of cities and the peri-urban river systems play an important role in the supply of water for domestic use, agriculture, commerce, industry and the environment. It is therefore essential that periurban river systems are properly used and managed, especially under the pressure of urbanisation. Using the Hawkesbury-Nepean River system as an example, in this Chapter we discuss how management of the river system evolves under changing circumstances. We then examine the complexity of managing peri-urban river system and discuss a multitude of challenges and issues that have to be resolved to achieve sustainability of water resources in peri-urban landscapes. We also identify actions, engagement strategies and governance mechanisms that infl uence the outcomes of water resources management in a peri-urban context. Genuine engagement of community, government agencies and other stakeholders is an important vehicle to establish dialogue and achieve effective and long-term water resources planning at a regional scale. However, the engagement and programs for securing water futures in peri-urban landscapes is made more diffi cult due to a large number of stakeholders, agencies and interests involved and the changing roles of participants as government policy changes.

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“…Unit-area models like CMSS have evolved from the need to be able to use readily available observation data and are based on a concept that the nutrient status of a catchment is a function of geological characteristics, land use and land management practices within the catchment (Baginska et al, 2003). CMSS was developed as a simple decision support system to test various environmental policies and management practices.…”

Section: Introductionmentioning

confidence: 99%

“…However, selection of nutrient generation rates can be difficult because nutrients generated can significantly vary with climate, hydrologic conditions, land use distribution, soil nutrient concentrations, population and physiography. Therefore, adjustments of quoted generation rates often have to be made to better reflect the environmental and management conditions within the catchment under study (Baginska et al, 2003). This process is often arbitrary.…”

Section: Introductionmentioning

confidence: 99%

Estimating annual generation rates of total P and total N for different land uses in Tasmania, Australia

Broad

Corkrey²

2011

Journal of Environmental Management

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Roles of land use resolution and unit-area load rates in assessment of diffuse nutrient emissions

Cited by 26 publications

References 10 publications

The impact of small and large impoundments on freshwater mussel distribution in the Hawkesbury‐Nepean River, southeastern Australia

The impact of small and large impoundments on freshwater mussel distribution in the Hawkesbury‐Nepean River, southeastern Australia

Sustainability of Water Resources in Peri-Urban Landscapes: Learning from the Journey of Engagement

Estimating annual generation rates of total P and total N for different land uses in Tasmania, Australia

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