رسالة جامعية
Flow-regime management: a paradigm for urban stream protection and restoration
| العنوان: | Flow-regime management: a paradigm for urban stream protection and restoration |
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| المؤلفون: | Burns, Matthew James |
| سنة النشر: | 2017 |
| المجموعة: | Monash University: Figshare |
| مصطلحات موضوعية: | Ecology, Hydrology, Stream, thesis(doctorate), ethesis-20131018-124627, Stormwater, monash:120287, 1959.1/905861, Restricted access, River |
| الوقت: | 2013 |
| الوصف: | Healthy streams are important. They support a range of biota and ecosystem services. Yet, many urban streams are degraded; primarily by stormwater runoff, delivered through conventional stormwater drainage systems. Standard approaches to stormwater management for environmental protection do not address the ecologically important changes to hydrology caused by stormwater drainage. My thesis proposed and explored an alternative approach to stormwater management—flow-regime management—which emphasizes the protection or restoration of hydrologic (and water quality) processes at small scales with the aim of returning catchment-scale flow regimes towards their natural condition. Building on this concept, the thesis assessed the degree to which SIGNAL (an aquatic macroinvertebrate assemblage composition index) is predicted by hydrologic indicators and a landscape-scale indicator of stormwater runoff (attenuated imperviousness [AI]). SIGNAL was best predicted by AI, while a model that included hydrologic indicators characterising high- and low-flow hydrology was only marginally less plausible. It was postulated that AI integrates all aspects of hydrologic alteration and other stressors, such as reduced in-stream water quality. The analyses confirmed the importance of stormwater runoff conveyed by stormwater drainage systems as a primary source of degradation to receiving waters. The thesis developed and evaluated a framework for setting stormwater management objectives, covering three components: (i) the proportion of rain falling on impervious areas that should be lost (evapotranspired and/or harvested), (ii) the proportion that should be infiltrated, and the (iii) equivalent initial loss, which characterizes the probability of surface runoff from a rain-event, with the aim of restoring pre-development levels of runoff retention within the catchment. Numeric targets for each objective were calculated for Melbourne, Australia as a case study. At land-parcel (site) and streetscape scales, empirical data and modelling ... |
| نوع الوثيقة: | thesis |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/thesis/Flow-regime_management_a_paradigm_for_urban_stream_protection_and_restoration/4700542Test |
| DOI: | 10.4225/03/58b4b5aede8f8 |
| الإتاحة: | https://doi.org/10.4225/03/58b4b5aede8f8Test https://figshare.com/articles/thesis/Flow-regime_management_a_paradigm_for_urban_stream_protection_and_restoration/4700542Test |
| حقوق: | In Copyright |
| رقم الانضمام: | edsbas.F62EE66E |
| قاعدة البيانات: | BASE |
| DOI: | 10.4225/03/58b4b5aede8f8 |
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