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The need to recognise and account for the influence of working from home on commuting activity has never been so real as a result of the COVID-19 pandemic. Not only does this change the performance of the transport network, it also means that the way in which transport modellers and planners use models estimated on a typical weekday of travel and expand it up to the week and the year must be questioned and appropriately revised to adjust for the quantum of working from home. Although teleworking is not a new phenomenon, what is new is the ferocity by which it has been imposed on individuals throughout the world, and the expectation that working from home is no longer a temporary phenomenon but one that is likely to continue to some non-marginal extent given its acceptance and revealed preferences from both many employees and employ where working from home makes good sense. This paper formalises the relationship between working from home and commuting by day of the week and time of day for two large metropolitan areas in Australia, Brisbane and Sydney, using a mixed logit choice model, identifying the influences on such choices together with a mapping model between the probability of working from home and socioeconomic and other contextual influences that are commonly used in strategic transport models to predict demand for various modes by location. The findings, based on Wave 3 (approximately 6 months from the initial outbreak of the pandemic) of an ongoing data collection exercise, provide the first formal evidence for Australia in enabling transport planners to adjust their predicted modal shares and overall modal travel activity for the presence of working from home. [ABSTRACT FROM AUTHOR]

• A novel method to simulate multifunctional biomimetic adaptive facades is proposed. • Multifunctional adaptive facades can be simulated with script-based controls. • 600 iterations of a multifunctional shading and ventilating Bio-ABS is analysed. • PVC glazing achieves shading, and SMA springs trigger ventilation by openings. • An adaptive façade over a non-adaptable one improves thermal comfort by 18 to 37.1%. Biomimetic adaptive building skins (Bio-ABS), being adaptable to changing environmental conditions, can foster improved comfort and reduced energy demand. Bio-ABS are climate-adaptable façades, and biological functions inspire their design. Buildings often require multiple functions for improved environmental performance. Multifunctionality refers to hosting multiple triggered by diverse stimuli interdependently. The realisation of multifunctional Bio-ABS may be challenging due to difficult construction processes, expensive materials, and the complexity in their application. Thus, digital modelling and simulation of multifunctional Bio-ABS are important to predict their performance. This paper reviews the studies on simulating Bio-ABS, proposes a novel simulation framework for multifunctional Bio-ABS and demonstrates it through a parametric case study. Performance comparisons among twenty base-case scenarios and 600 iterations of shading and ventilating multifunctional Bio-ABS provides shading through photovoltachromic (PVC) glazing and ventilation through Shape Memory Alloy (SMA) springs triggered openings. It is multifunctional by changing its morphology and physiology due to photovoltachromic glazing triggered by solar irradiance and Shape Memory Alloys being triggered by temperature. The results show that Bio-ABS improves building performance when compared against non-adaptable façades, reaching 37.1% for 90% acceptability limits and 18% for 80% acceptability limits for adaptive thermal comfort in an educational building in the humid subtropical climate of Sydney. Australia. The main outcome and contribution of this study is a novel simulation framework to predict the performance of morphology and physiology changing multifunctional Bio-ABS. Future work may focus on prototyping and validated experiments to close the gap between theory and the real world. [ABSTRACT FROM AUTHOR]

This paper estimates the short-term reduction in money and time costs associated with a reduction in car and public transport commuting activity in the Greater Sydney Metropolitan Area (GSMA) during a period of the COVID-19 pandemic in which Australia started to see an easing of restrictions (see Beck and Hensher 2020a). As of late May 2020, three months after COVID-19 resulted in restrictions in Australia, we saw an annual travel time reduction for car and public transport commuters in the GSMA of $5.58 billion, representing a 54.02% reduction in the Pre-COVID-19 total time costs, much of which we would suggest can be associated with reductions in congestions costs. Adjusting further for reduced employment volumes relative to pre-COVID-19 levels, to take into account reduced commuting activity due, in part, to a lower volume of work associated with a loss of employment or lower employment hours, the annual time cost reduction for all commuters who still have regular pre-COVID-19 levels of employment are estimated as $4.4 billion. Hence there is $1.17 billion worth of reduced time costs associated with significantly reduced employment hours, including a loss of employment. The implications for road investment linked to congestion in particular is profound, and shows how much of an increase in benefit to society, through congestion busting, can be obtained by more flexible work arrangements, even allowing for some switching into car out of public transport. Whether the current decrease in travel costs will be long-lasting is unknown, but it does support the appeal of working from home, if it is sustainable, as a policy lever to reduce levels of congestion on the roads and crowding in public transport. • Estimates the short-term reduction in money and time costs associated with commuting activity during a period of the COVID-19 pandemic. • Annual travel time reduction for all car and PT commuters of $5.58 billion, a 54.02% reduction in the Pre-COVID-19 total time costs. • The implications for road investment linked to congestion in particular is profound. • Shows how much of an increase in benefit to society, through congestion busting, can be obtained by more flexible work arrangements. • Support the appeal of working from home as a policy lever to reduce levels of congestion on the roads and crowding in public transport. [ABSTRACT FROM AUTHOR]

• Literature suggests that value of time (VOT) may decrease due to advent of AVs. • Reduction in VOT may impact households' residential location choices. • This expectation was tested empirically using stated choice methods. • Empirical results do not suggest drastic changes in VOT due to AVs. The literature suggests that autonomous vehicles (AVs) may drastically change the user experience of private automobile travel by allowing users to engage in productive or relaxing activities while travelling. As a consequence, the generalised cost of car travel may decrease, and car users may become less sensitive to travel time. By facilitating private motorised mobility, AVs may eventually impact land use and households' residential location choices. This paper seeks to advance the understanding of the potential impacts of AVs on travel behaviour and land use by investigating stated preferences for combinations of residential locations and travel options for the commute in the context of autonomous automobile travel. Our analysis draws from a stated preference survey, which was completed by 512 commuters from the Sydney metropolitan area in Australia and provides insights into travel time valuations in a long-term decision-making context. For the analysis of the stated choice data, mixed logit models are estimated. Based on the empirical results, no changes in the valuation of travel time due to the advent of AVs should be expected. However, given the hypothetical nature of the stated preference survey, the results may be affected by methodological limitations. [ABSTRACT FROM AUTHOR]

• Bayesian network used to structure available knowledge and facilitate simulation of management alternatives. • Demand for urbanization and recreation were identified as dominant human drivers, exerting pressure on the beach ecosystem. • Demographic trends were integrated into a decision-making framework that supports beach managers. • Beach user surveys proposed as periodic network inputs, indicating beach recreational quality and management issues. • Urban WALROS classes were widespread across land-based sites, and more natural classes prevailed over water-based sites. Managing coastal areas under an Ecosystem Based Approach–Marine Spatial Planning framework acknowledges the complexity associated with the need to address multiple environmental and socioeconomic issues. The development of efficient management plans is critical to the implementation success of the framework; in this regard, unresolved challenges remain for measuring the effectiveness of planning plans and monitoring implementation progress. This paper describes the development of a Bayesian Belief Network as a prototype Decision Support Tool to assist coastal planning in the catchment areas of the Sydney Harbour, New South Wales, Australia. The model was co-designed with local managers, underpinned by the Drivers-Pressures-States-Impacts-Responses analytical framework to identify key coastal cause-effect relationships, and by the Recreational Opportunity Spectrum framework to account for significant recreational areas. The Bayesian Belief Network was structured on a conceptualisation of the relationships between key pressures affecting coastal management targets (biological areas and human activities) and their impacts on the state of the variables, with emphasis on the beach ecosystem. The socio-economic component of the model consists of predictive socio-economic modelling on preferred beach activities, the assessment of beach recreational settings, and a beach quality survey. Conditional probability tables were derived from local and regional databases. The model structure allows decision makers enhanced understanding of key interactions between management variables, assessment of management scenarios, and increased accountability of planning decisions. Future work on the prototype could expand the model to become a Bayesian Decision Network, through the integration of proposed management actions and their utilities, thereby helping managers identify optimal decisions. [ABSTRACT FROM AUTHOR]

• Assess interest in various MaaS subscription bundles using Sydney trial data. • Establish the role of financial savings on MaaS bundle uptake. • Identify key drivers of user's choices between subscriptions and PAYG. • MaaS with PAYG option only is unlikely to grow the market. • MaaS could obtain a sizeable uptake with appropriate incentive and subscription bundles. Australia's first Mobility as a Service (MaaS) trial commenced in April 2019 in Sydney. A key objective of the trial is to assess interest in various MaaS subscription plans through bundling public transport, ride share, car share and car rental with varying financial discounts and monthly subscription fees, in contrast to pay as you go (PAYG). This paper develops a mixed logit choice model to investigate the participants' choice between PAYG and four subscription plans (or bundles) that were incrementally introduced over a 5-month period. This is the first paper to model real uptake as previous studies are based on stated preference data. New evidence is provided on what role financial savings, estimated using tracking technology embedded in the MaaS app, play in the context of modal offerings and a monthly subscription fee as well as socio-demographic and seasonal effects. Behaviourally, we present evidence on the extent of take up of each bundle relative to PAYG as well as elasticity estimates for all exogenous influences and estimates of willingness to pay and scenario assessment, particularly for how much someone would have to save over a previous month's cost outlay to be willing to subscribe to a particular bundle in a subsequent month. Within the context of the trial, the findings suggest a substantial market for mobility bundles but PAYG is an option preferred by many, particularly those with varying travel needs. We are, however, not in a position yet to conclude that these choices necessarily align with a contribution to societal sustainability goals. [ABSTRACT FROM AUTHOR]

Diet-related chronic diseases are a major health problem faced by developed and developing countries. Although individuals’ dietary patterns are often associated with varied psychological and socioeconomic factors, built environment factors can be important determinants of food choices. Whilst there is some evidence to suggest a link between access to food and food consumption, it remains unclear how a wider range of built environment factors influence residents’ food choices. A deeper understanding of these relationships could reveal under-researched aspects of a healthy built environment. This paper explores how residents in inner Sydney neighborhoods access food and investigates how characteristics of the built environment influence their food choices. Eighteen participants, representing a range of ethnic backgrounds and levels of income, were selected for in-depth interviews. Several urban barriers to healthy food consumption were identified through analysis. Distance, land use and urban form, in particular, shape the food choices of individuals in different ways. These findings have implications for urban planning and policy making for healthy cities. [ABSTRACT FROM AUTHOR]

CoastSnap is a low-cost community beach monitoring program that turns everyday smartphones into devices to measure coastal response to storms, sea-level rise, human modifications and other factors. Underpinning CoastSnap is a stainless-steel smartphone cradle that is installed overlooking a beach in a location easily accessible to the public. Using the cradle for image positioning, passers-by simply take a photo of the coast and upload it to a centralized database, which in turn provides a crowd-sourced record of coastline change over time. Behind this simple idea are advanced image processing algorithms that then enable the shoreline position (and other coastal features) to be mapped from the community snapshots in a scientifically rigorous manner. First established in Sydney, Australia in 2017, the network of CoastSnap stations has grown rapidly over the past five years to now encompass 200 monitoring locations in 21 countries. Analysis of the 44 Australian stations managed by the Authors indicates strong community participation, with over 10,000 images and 4000 community participants to date and an image submission frequency ranging from approximately weekly to daily (average = 2.6 images/station/week). Example practical applications of CoastSnap include: as a tool to monitor high-frequency shoreline change and coastal inlet dynamics; to support conservation efforts on protected coastlines; and to directly inform the timing of dredging and beach nourishment activities. This paper describes the background and evolution of the project and discusses its successes, challenges as well as future directions. • CoastSnap demonstrates how community smartphone images can accurately monitor coastal change. • Global CoastSnap network now comprises 200 stations in 21 countries. • Participation statistics in Australia indicate strong community uptake (weekly to sub-daily imagery). [ABSTRACT FROM AUTHOR]

Assessment criteria for thermal comfort in residential buildings are often defined on the basis of the adaptive comfort model due to their typical operational characteristics – i.e. mixed-mode or naturally ventilation. However, recent field studies demonstrate that the current adaptive comfort model prescribed in the international standard does not necessarily provide appropriate comfort criteria for residential buildings, since its occupants may be less thermally sensitive due to enhanced adaptability and greater tolerance of temperature variation. This paper examined perception of thermal comfort and behavioural adaptation of residents in two cities on the east coast of Australia – Sydney and Brisbane. With an aim to develop a method of deriving acceptable temperature ranges for different climate characteristics, statistical analyses were performed on two sets of longitudinal field study data collected in the two study regions. The statistical analysis estimates the acceptable temperature range for the two cities at around 11 K, which is 4 K wider than that prescribed by the ASHRAE's adaptive comfort model. The results also indicate that the 80% acceptability range can shift according to the climate, with 1.5 K difference being observed between the two study regions. The findings of this study can help climate-responsive design of houses, hence allowing the design to more closely meet occupants' comfort needs. • Residential thermal comfort and behavioural adaptation in two cities are presented. • Acceptable temperature range was 4 K wider than the ASHRAE's adaptive comfort model. • Acceptable temperatures can shift according to the climate characteristics. • Findings of this study can help designing houses to meet occupants' comfort needs. [ABSTRACT FROM AUTHOR]

Abstract: Equalities landscapes for sexual minorities are not achieved by formal legal and political change alone. This paper examines everyday friendships between straight- and gay-identifying men in Sydney, Australia, articulating the relational constitution of ‘pro-gay’ heterosexual men and equalities landscapes. Utilising interview and media data, I argue that pro-gay hetero-masculine subjects are evident in this context, and moreover, influence the creation of inner Sydney as an equalities landscape. Since hetero-masculinities are hegemonic in the social structures and systemic practices of heterosexism underpinning inequities for sexual minorities, attitudinal and behavioural changes in heterosexual men are fundamental for defining equalities landscapes. Furthermore, this analysis extends geographical research on sexualities, masculinities and friendship. I suggest that straight–gay friendships are a ‘contradictory resource’ for personal and social change. There are certainly possibilities for mutually reconfiguring masculine subjectivities and equalities landscapes, but simultaneously these are enacted within, and reinforce, existing systems of social difference and dominance. While constituting pro-gay hetero-masculinities, straight–gay friendships create landscapes of both new equalities and persistent inequalities. I discuss this complexity via three themes on the performance of relational masculinities, drawn from the interview data but presaged by the media data: relations of difference, networked relations, and relations of similarity and structural reinforcement. Nevertheless, I argue that reconfiguring hetero-masculinity is necessary for equalities landscapes, and must be an aim of gender and sexual politics. Consequently, I suggest that attempts to shift hetero-masculinity at the everyday level, via self-reflection and ordinary encounters, have a profound influence on equalities landscapes. [Copyright &y& Elsevier]

'City Deals' are new governance instruments for urban development. Vast evidence exists on the relationship between urban factors and health equity, but little research applies a health equity lens to urban policy-making. This paper does precisely that for the Western Sydney City Deal (WSCD) in Australia. We conducted a critical discourse analysis of publicly available documents and interviews with the WSCD's main architects, applying insights from relevant theories. We find 'pro-growth' discourse to encourage economic investment dominates any references to disadvantage. Interviewees maintained the WSCDs fundamental purpose is to rebalance urban investment toward the historically disadvantaged West. However, the WSCD makes limited reference to health and none to equity. Institutionalised governance practices that favour private investments in infrastructure remain the dominant force behind the WSCD. We document how a shift to 'place-based' infrastructure has promise for equity but struggles to overcome institutionalised approaches to urban investments. [ABSTRACT FROM AUTHOR]

Introduction: The absence of a clear model of care for services supporting pregnant women and mothers with substance use disorders has impeded opportunities to build an evidence base for the effectiveness of these services. Previous research has typically focused on the needs of pregnant women or mothers, as two distinct groups. This paper explores service providers' perceptions of key components of a model of care, extending from perinatal care to community-based support for up to 17 years post-delivery. A model of care is outlined and feasibility factors affecting implementation are highlighted.Methods: Qualitative methods were adopted as a first step to informing development of the model of care. Semi-structured in-depth interviews were conducted with thirty-eight staff providing a range of substance use in pregnancy and parenting services (SUPPS) in hospital and community-based agencies, in a metropolitan health district in Sydney, Australia. Interview data was entered into NVivo and analysed using constant comparative methods.Results: Guiding principles for the model of care included integrated care, harm reduction and person-centredness. Practice approaches integral to the model of care were promoting engagement with women, flexible service provision, trauma-informed care, and continuity of care. Feasibility factors influencing implementation of the model of care included fragmentation or siloing of the service network and workforce sustainability.Conclusions: A harm reduction approach was crucial for promoting engagement of women with SUPPS, particularly child protection services. A greater focus on providing ongoing community-based support for mothers also has the potential to achieve sustainable positive outcomes for women and children. Implementation of the SUPPS model of care could be undermined by threats to integration of service delivery and continuity of care. Further research is needed to explore consumer perspectives and inform the model of care as a framework for evaluation. [ABSTRACT FROM AUTHOR]

Abstract: This paper provides a synopsis of the current regulatory and institutional arrangements that pertain to the urban water and wastewater sector in Australia. A short and selected institutional history of the urban water sectors in the Australian cities of Sydney and Melbourne is outlined, followed by an analysis of the relative effectiveness of the institutional structures in enabling the sector to respond to the challenges faced by the sector in the future. [Copyright &y& Elsevier]

Within scholarly discussion about the mother identity and how it is assumed, women with intellectual disabilities are silent. While debate has explored the experiences of many considered to mother outside the margins of the motherhood institution, the experiences of this group of women lies beyond that reach. This paper presents findings from a phenomenological study into becoming a mother for women with intellectual disabilities. The experiences of these women broaden our conceptual understanding of a well debated phenomenon and suggest that their social networks are integral to the development of the mother identity. As mother, the women with intellectual disabilities in this study aligned themselves with a key person in their social network who advocated for and supported them as the central figure in the life of their babies. Examining the experiences of perhaps the most marginalised of women serves to expand understanding of the means by which women come to understand themselves as mothers and assume the identity of mother. [ABSTRACT FROM AUTHOR]

Abstract: Rainwater tanks have become popular in large Australian cities due to water shortage and greater public awareness towards sustainable urban development. Rainwater harvesting in multi-unit buildings in Australia is less common. This paper investigates the water savings potential of rainwater tanks fitted in multi-unit residential buildings in three cities of Australia: Sydney, Newcastle and Wollongong. It is found that for multi-unit buildings, a larger tank size is more appropriate to maximise water savings. It is also found that rainwater tank of appropriate size in a multi-unit building can provide significant mains water savings even in dry years. A prediction equation is developed which can be used to estimate average annual water savings from having a rainwater tank in a multi-unit building in these three Australian cities. [ABSTRACT FROM AUTHOR]

Abstract: The waste intermodal station of Clyde, in the city of Sydney, Australia, is in the heart of a complex network of terminals connected by road and rail to transport urban waste from its first collection to its final disposal. The amount of waste the network is projected to handle in 2015 will increase from about 340,000tonnes/year in 2006 up to about 1.5million tonnes/year, following population and consumption raise. The paper proposes a discrete-event model to represent Clyde Transfer Station (TS) and its relations with the other terminals. Such a model allows one to evaluate the effects of different expansion plans of the station structures as well as different policies of the collection service. The results show that, as often happens, a careful consideration of management alternatives can decrease the necessity of structural enlargement, which is normally much more expensive, if at all possible. [Copyright &y& Elsevier]

Abstract: Australia has been progressive by world standards in its programme of airport privatisation and the adoption of a ‘light-handed’ regime of airport regulation. This paper discusses Sydney Airport''s experience in negotiating commercial pricing agreements with airlines in the context of the light-handed regime and the Australian infrastructure access arrangements. It concludes that contractual relationships in an environment of informal regulation are able to provide sound, and arguably superior, outcomes to formal price regulation. [Copyright &y& Elsevier]

We are told that electric vehicles, cars in particular, will be good for the environment. But what exactly might this mean? It is true that end use emissions will be significantly reduced when we move from fossil fuels to green energy sources? Assuming that the demand for such cars, including battery electric vehicles (BEVs) in particular will grow, we can expect a significant number of such vehicles manufactured in future years. Given the potentially relatively lower cost (fewer moving parts) compared to internal combustion engine vehicles as well as the significantly lower usage costs per kilometre, we would expect a level of uptake that could impact on the performance of the road network (perhaps increased congestion and crash risk) but also a concomitant reduced use of public transport and fuel excise loss. In this paper, we apply the MetroScan modelling system in the Greater Sydney Metropolitan Area (GSMA) over the period 2021–2056 to identify the likely impact that the growth in BEV ownership and use will have on vehicle kilometres, modal shares, government revenues, levels of CO 2 emissions and other impacts. Moreover, we investigate the introduction of a BEV usage charge proposed in Australia to see what it might do to these key performance indicators and whether it can offset the adverse effects during BEV uptake such as government fuel excise revenue loss and increased congestion. [ABSTRACT FROM AUTHOR]

• The typical stripper in the PCC is replaced by an innovative solar stripper (So-St). • The conceptual design for direct solvent regeneration in the solar field is analysed. • A design protocol to calculate So-St segments and modules layout is developed. • The length and diameter of subsequent segments to the overall design is optimized. • The process control for the pressure drop and enhanced heat transfer is maintained. This paper presents an advanced thermodynamic analysis to design a solar stripper (So-St) field to replace the conventional desorption unit in a post-combustion carbon capture (PCC) plant. By eliminating the large, complex, and costly stripper, a solar collector field (SCF) consisting of a number of So-St arrays is sized to directly release the CO 2 gas from the rich solvent under transient conditions. In this study, a design protocol has been developed to address the key design challenges for the evolving two-phase flow in the solar receiver tube analysing the instantaneous flow regime, pressure drop, and vapour molar fraction (VMF) to enhance the heat transfer. This design protocol optimizes the physical properties of the So-St components and eventually leads to the whole So-St field sizing based on the nominal capture capacity. A case-study is demonstrated to capture 1.5M tonne CO2 /y from a representative 660 MW e coal-fired power plant in Sydney/Australia. It is found that 22 rich solvent loops that each consists of an array of 6 parallel So-St modules, where each module consists of 6 segments in series is needed. The length/diameter of these So-St segments/modules are optimized for this case-study, and the design procedures are clarified and simplified which can be easily applied for other case-studies. Techno-economic validation of this novel So-St technology is an essential step-forward to fully solarize and autonomies carbon capture industry. [ABSTRACT FROM AUTHOR]

Due to their large range across diverse habitats, flying-foxes are potential bioindicator species for environmental metal exposure. To test this hypothesis, blood spots, urine, fur, liver and kidney samples were collected from grey-headed flying-foxes (Pteropus poliocephalus) and black flying-foxes (P. alecto) from the Sydney basin, Australia. Concentrations of arsenic, cadmium, copper, lead, mercury and zinc and 11 other trace metals were determined using inductively coupled plasma mass spectrometry. As predicted, kidney and fur lead concentrations were lower compared to concentrations found in flying-foxes in the early 1990's, due to reduced environmental lead emissions. Tissue cadmium concentrations in flying-foxes were higher compared to previous studies of flying-foxes and other bat species, suggesting that flying-foxes were exposed to unrecognized cadmium sources. Identification of these sources should be a focus of future research. Urine concentrations of arsenic, cadmium, mercury, and lead were proportional to kidney concentrations. Given that urine can be collected from flying-foxes without handling, this demonstrates that many flying-foxes can be assessed for metal exposure with relative ease. The analysis of blood spots was not viable because of variable metal concentrations in the filter paper used. Fur concentrations of metals correlated poorly with tissue concentrations at the low levels of metals found in this study, but fur could still be a useful sample if flying-foxes are exposed to high levels of metals. Lastly, heat inactivation had minimal impact on metal concentrations in kidney and liver samples and should be considered as a tool to protect personnel working with biohazardous samples. • The utility of flying-foxes as bioindicators of metal pollution was explored. • Tissue lead concentrations were reduced compared to flying-foxes sampled in the 1990s. • Evidence of chronic cadmium exposure was found. • Urine concentrations of lead and cadmium reflected those found in tissues. [ABSTRACT FROM AUTHOR]

Rainwater harvesting (RWH) has become a popular water saving and conservation means across the globe. In many cities, a pre-determined rainwater tank size is generally selected without a detail water balance modelling at the location on interest. However, to achieve maximum benefit from a RWH system at a given location, it is desirable to design the system based on the site specific conditions (e.g. local rainfall and loss characteristics) and other relevant design parameters. There have been limited studies on regionalization of RWH system, which can account for the spatial variability in rainfall, loss and water demand characteristics over a given region to provide site-specific design of RWH system. This paper presents a RWH regionalization approach to develop a set of design curves, which assist in the selection of an adequate RWH system at a given location. We use rainfall data from 159 rain gauges across the Greater Sydney region in Australia to develop and test the proposed regionalization approach. It has been found that there is a significant variation in rainfall characteristics across Greater Sydney region and that a common tank size across this region does not present an adequate solution. It has been found that a 5 kL tank can achieve a reliability (i.e. percentage of days the RWH can meet the given demand) of 31–93% for four people depending on the location in the Greater Sydney region and the types of water use. The developed regional design curves could result in increased water savings across Greater Sydney. The proposed regionalization approach can be adapted to other cities across Australia and the world which present a high rainfall gradient. • Water savings by rainwater harvesting at 159 locations in Sydney are evaluated. • Reliability of a rainwater tank is moderately correlated with mean annual rainfall. • A set of design curves is developed for Sydney to enhance rainwater harvesting. [ABSTRACT FROM AUTHOR]