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This paper evaluates the potential for reconfiguring city-scale clean water demand by reducing the non-residential asset sanitsation water footprint. A novel methodological framework is proposed for assessing the feasibility of a mix of three surface sanitisation measures (Manual surface wiping, Mechanical cleaning/Rapid disinfectant spraying, Ultraviolet germicidal irradiation-UVGI treatment) in terms of a Sanitisation waterfootprint index (SWI); three typical application scenarios are considered – high risk-high frequency, moderate risk-moderate frequency, moderate risk-low frequency. The UVGI treatment outperforms the other two surface treatment methods, particularly in high risk-high frequency scenario in the healthcare setting, with SWI as low as 2%. Further, case-study evidence from a ward-level spatial analysis using real-world data estimates SWI ranging between 0-30% in those wards with greater commercial/public assets, showing clear merit of this framework in re-configuring city-scale public health sanitisation water footprint. A cost-benefit analysis (involving resources – staffing, water and chemicals; capital expenditure, and energy costs) shows superior performance of UVGI treatment over the other two methods from the second year onwards, surpassing the initial cost-effectiveness for corresponding manual or mechanical cleaning. Wider implementation of this framework can foster strategic transformation of city-scale water footprint, which is deemed essential for ensuring sustainable growth of water deficient cities globally.
Abhishek Tiwary; Subhes Bhattacharyya; Mohammed Matouq. Reducing non-residential asset sanitisation water footprint for improved public health in water-deficient cities. Sustainable Cities and Society 2021, 75, 103268 .
AMA StyleAbhishek Tiwary, Subhes Bhattacharyya, Mohammed Matouq. Reducing non-residential asset sanitisation water footprint for improved public health in water-deficient cities. Sustainable Cities and Society. 2021; 75 ():103268.
Chicago/Turabian StyleAbhishek Tiwary; Subhes Bhattacharyya; Mohammed Matouq. 2021. "Reducing non-residential asset sanitisation water footprint for improved public health in water-deficient cities." Sustainable Cities and Society 75, no. : 103268.
Autonomous, hybrid renewable energy systems (HRES) are increasingly being deployed in geographically challenging terrains, often lacking adequate resilience planning for natural disasters. An assessment framework is developed to evaluate sustainable HRES design for remote off-grid application, ensuring its operability under an extreme event, i.e. its ability to absorb the shock event and continue operating. Optimal HRES configurations are obtained for different extreme events, applying Pareto optimality with key criteria of minimising the number of black outs constrained by Net Present Cost (NPC). The framework is demonstrated for a remote location in Chile. Operability of an HRES under an extreme event is found to involve a trade-off between the investment decision to reduce the vulnerability of RET components and to enhance its energy storage. The optimised HRES is found to be cost-effective for resilience against seasonal events (for flooding and snowstorm the additional NPC is 4.6%, 7.4% respectively) but unsustainable for low probability-high impact events (for earthquakes the additional NPC of 20.5% largely from increase investment in storage capacity). The study also highlights the role of the dispatch strategy in enabling a micro hydro as a secondary storage component for both fulfilling the unmet loads and for charging batteries.
Oscar Espinoza; Abhishek Tiwary. Assessment of autonomous renewable energy system operability under extreme events and disasters. Sustainable Energy Technologies and Assessments 2021, 44, 100995 .
AMA StyleOscar Espinoza, Abhishek Tiwary. Assessment of autonomous renewable energy system operability under extreme events and disasters. Sustainable Energy Technologies and Assessments. 2021; 44 ():100995.
Chicago/Turabian StyleOscar Espinoza; Abhishek Tiwary. 2021. "Assessment of autonomous renewable energy system operability under extreme events and disasters." Sustainable Energy Technologies and Assessments 44, no. : 100995.
The role of the urban common (i.e. shared space and resources) in sustainable provisioning of goods and services to city dwellers is discussed in this paper. Focusing on tree-based green infrastructure, the study scope includes three categories of provisioning (woody biomass, food/fibre, and non-timber forest products, i.e. NTFPs), alongside three categories of supporting services (fresh water replenishment, soil nutrient restoration, building preservation). As a first step, prospects of utilizing the urban common as facilitator of nature-based solution to the earmarked provisioning services are evaluated through dedicated literature survey and expert elicitation on perceived impact of environmental change triggers and management interventions (planning and/or governance). This is followed by a structured review of the state of affairs in four European cities (London, Amsterdam, Sofia, Ljubljana), representing different macro-geographical regions with distinct socio-economic drivers in managing these provisioning services. The pan-European expert elicitation exercise noted active management of the urban common as positively impacting on the performance of the majority of provisioning services, while environmental change impacts were found to be overriding and adversely influencing the provisioning of material resources (mainly NTFPs and woody biomass). The four-city case study highlighted some regional peculiarities in connecting the city dwellers to the urban common and identified the need to overcome socio-cultural barriers for enhancing pan-European best practice sharing in the management of goods and services provisioning. This is deemed essential to pave way for an emerging perspective on sustainable utilization of the urban common as an enabler for nature-based solution, making it fit for purpose in meeting the astronomical demands of future urban living.
Abhishek Tiwary; Ursa Vilhar; Miglena Zhiyanski; Vladimir Stojanovski; Lucian Dinca. Management of nature-based goods and services provisioning from the urban common: a pan-European perspective. Urban Ecosystems 2020, 23, 645 -657.
AMA StyleAbhishek Tiwary, Ursa Vilhar, Miglena Zhiyanski, Vladimir Stojanovski, Lucian Dinca. Management of nature-based goods and services provisioning from the urban common: a pan-European perspective. Urban Ecosystems. 2020; 23 (3):645-657.
Chicago/Turabian StyleAbhishek Tiwary; Ursa Vilhar; Miglena Zhiyanski; Vladimir Stojanovski; Lucian Dinca. 2020. "Management of nature-based goods and services provisioning from the urban common: a pan-European perspective." Urban Ecosystems 23, no. 3: 645-657.
Background: Schools typically have high diurnal fluctuation in electricity demand, with peak loads during daylight hours, which could be adequately met through harnessing solar renewable resources. This study demonstrates the strength of techno-economic assessment in selection and optimization of a grid-connected hybrid renewable energy system (HRES), utilizing local renewable resources to fulfil the daytime electricity demand for a school in northwest Indonesia. Methods: Three different scenarios are developed for optimizing the HRES configurations, comprising of PV panels, Wind turbine, Battery and Inverter. The following optimization parameters are used—one, technological performance of the HRES, in terms of their energy output to fulfil the energy deficit; two, economic performance of the HRES, in terms of their net present cost (NPC) and payback periods. Results: A clear trade-off is noted between the level of complexity of the three HRES, their renewable electricity generation potentials, NPC and payback periods. Scenario II, comprising of Solar PV and Inverter only, is found to be the most feasible and cost-effective HRES, with the optimized configuration of 245 kW PV capacity and 184 kW inverter having the lowest initial capital cost of US$ 51,686 and a payback time of 4 years to meet the school’s annual electricity load of 114,654 kWh. Its NPC is US$ −138,017 at the 20th year of installation. The negative value in year 20 is achieved through the sale of 40% of the renewable energy back to the grid. Conclusions: Techno-economic assessment can provide useful decision support in designing HRES relying on solar energy to serve predominantly daytime school electricity requirements in tropical countries.
Biadelma Illiandi; Abhishek Tiwary. Techno-Economic Feasibility of a Grid-Connected Hybrid Renewable Energy System for a School in North-West Indonesia. Journal of Sustainability Research 2020, 2, 1 .
AMA StyleBiadelma Illiandi, Abhishek Tiwary. Techno-Economic Feasibility of a Grid-Connected Hybrid Renewable Energy System for a School in North-West Indonesia. Journal of Sustainability Research. 2020; 2 (2):1.
Chicago/Turabian StyleBiadelma Illiandi; Abhishek Tiwary. 2020. "Techno-Economic Feasibility of a Grid-Connected Hybrid Renewable Energy System for a School in North-West Indonesia." Journal of Sustainability Research 2, no. 2: 1.
As a Nature-Based Solution, urban forests deliver a number of environmental ecosystem services (EESs). To quantify these EESs, well-defined, reliable, quantifiable and stable indicators are needed. With literature analysis and expert knowledge gathered within COST Action FP1204 GreenInUrbs, we proposed a classification of urban forest EESs into three categories: (A) regulation of air, water, soil and climate; (B) provisioning of habitat quality; and (C) provisioning of other goods and services. Each category is divided into EES types: (a) amelioration of air quality; restoration of soil and water; amelioration of the microclimate; removal of CO2 from the air; (b) provision of habitat for biodiversity; support for resilient urban ecosystems; provision of genetic diversity; and (c) provision of energy and nutrients; provision of grey infrastructure resilience. Each EES type provides one or more benefits. For each of these 12 benefits, we propose a set of indicators to be used when analyzing the impacts on the identified EESs. Around half of the 36 indicators are relevant to more than one single benefit, which highlights complex interrelationships. The indicators of wider applicability are tree and stand characteristics, followed by leaf physical traits and tree species composition. This knowledge is needed for the optimization of the EESs delivered by urban forests, now and in the future.
Samson Roeland; Marco Moretti; Jorge Humberto Amorim; Cristina Branquinho; Silvano Fares; Federico Morelli; Ülo Niinemets; Elena Paoletti; Pedro Pinho; Gregorio Sgrigna; Vladimir Stojanovski; Abhishek Tiwary; Pierre Sicard; Carlo Calfapietra. Towards an integrative approach to evaluate the environmental ecosystem services provided by urban forest. Journal of Forestry Research 2019, 30, 1981 -1996.
AMA StyleSamson Roeland, Marco Moretti, Jorge Humberto Amorim, Cristina Branquinho, Silvano Fares, Federico Morelli, Ülo Niinemets, Elena Paoletti, Pedro Pinho, Gregorio Sgrigna, Vladimir Stojanovski, Abhishek Tiwary, Pierre Sicard, Carlo Calfapietra. Towards an integrative approach to evaluate the environmental ecosystem services provided by urban forest. Journal of Forestry Research. 2019; 30 (6):1981-1996.
Chicago/Turabian StyleSamson Roeland; Marco Moretti; Jorge Humberto Amorim; Cristina Branquinho; Silvano Fares; Federico Morelli; Ülo Niinemets; Elena Paoletti; Pedro Pinho; Gregorio Sgrigna; Vladimir Stojanovski; Abhishek Tiwary; Pierre Sicard; Carlo Calfapietra. 2019. "Towards an integrative approach to evaluate the environmental ecosystem services provided by urban forest." Journal of Forestry Research 30, no. 6: 1981-1996.
Growing pace of urban living is expected to simultaneously aggravate both the waste and the energy crises. This study presents feasibility assessment of a community scale hybrid renewable energy system (HRES) utilising biomass to serve the local energy needs while reducing the household solid waste volume. A modelling framework is presented and evaluated for a biomass HRES, comprising of a Wind turbine-PV Array-Biogas generator-Battery system, applied to two European cities - Gateshead (UK) and Sofia (Bulgaria) - accounting for their distinct domestic biowaste profiles, renewable resources and energy practices. Biogas generator is found to make the most substantial share of electricity generation (up to 60-65% of total), hence offering a stable community-scale basal electricity generation potential, alongside reduction in disposal costs of local solid waste. Net present cost for the biomass-integrated HRESs is found within 5% of each other, despite significant differences in the availability of solar and wind resources at the two sites. Based on a survey questionnaire targeting construction companies and energy solution developers, project costs and planning regulatory red tapes were identified as the two common implementation challenges in both the countries, with lack of awareness of HRES as a further limitation in Bulgaria, impeding wider uptake of this initiative.
Abhishek Tiwary; Stanislava Spasova; Ian D. Williams. A community-scale hybrid energy system integrating biomass for localised solid waste and renewable energy solution: Evaluations in UK and Bulgaria. Renewable Energy 2019, 139, 960 -967.
AMA StyleAbhishek Tiwary, Stanislava Spasova, Ian D. Williams. A community-scale hybrid energy system integrating biomass for localised solid waste and renewable energy solution: Evaluations in UK and Bulgaria. Renewable Energy. 2019; 139 ():960-967.
Chicago/Turabian StyleAbhishek Tiwary; Stanislava Spasova; Ian D. Williams. 2019. "A community-scale hybrid energy system integrating biomass for localised solid waste and renewable energy solution: Evaluations in UK and Bulgaria." Renewable Energy 139, no. : 960-967.
W. Apichonnabutr; A. Tiwary. Trade-offs between economic and environmental performance of an autonomous hybrid energy system using micro hydro. Applied Energy 2018, 226, 891 -904.
AMA StyleW. Apichonnabutr, A. Tiwary. Trade-offs between economic and environmental performance of an autonomous hybrid energy system using micro hydro. Applied Energy. 2018; 226 ():891-904.
Chicago/Turabian StyleW. Apichonnabutr; A. Tiwary. 2018. "Trade-offs between economic and environmental performance of an autonomous hybrid energy system using micro hydro." Applied Energy 226, no. : 891-904.
This paper evaluates the potential of living green façades in intercepting precipitation and delaying ‘canopy through-flow’ (i.e. total precipitation minus canopy interception). Precipitation interception and delayed through-flow (i.e. discharge) from two visually distinct mixed-species green façade configurations – one, fully-foliated and the other twiggy (respectively as proxies for well-managed and degenerated stands) – were monitored using rain gauges located at their base. The precipitation interception levels for the fully-foliated and the twiggy stands respectively ranged between 54 and 94% and 10–55% of the total precipitation. Regression of the experimental data showed interception volumes were proportional to the ambient precipitation up to a maximum tested event size of 35 mm. The fully-foliated façade gave a delay of at least 30 min from the start of precipitation events to the first measured through-flow, compared to about 15 min for the twiggy façade. This highlights the potential for well-foliated and maintained façades to contribute to reducing peak flows within urban drainage infrastructure, and the importance of façade maintenance in ensuring good interception and delay properties.
A. Tiwary; K. Godsmark; J. Smethurst. Field evaluation of precipitation interception potential of green façades. Ecological Engineering 2018, 122, 69 -75.
AMA StyleA. Tiwary, K. Godsmark, J. Smethurst. Field evaluation of precipitation interception potential of green façades. Ecological Engineering. 2018; 122 ():69-75.
Chicago/Turabian StyleA. Tiwary; K. Godsmark; J. Smethurst. 2018. "Field evaluation of precipitation interception potential of green façades." Ecological Engineering 122, no. : 69-75.
Abhishek Tiwary; Ian Williams. Gaseous air pollutants. Air Pollution 2018, 35 -83.
AMA StyleAbhishek Tiwary, Ian Williams. Gaseous air pollutants. Air Pollution. 2018; ():35-83.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Gaseous air pollutants." Air Pollution , no. : 35-83.
Abhishek Tiwary; Ian Williams. Air quality standards and legislations. Air Pollution 2018, 603 -645.
AMA StyleAbhishek Tiwary, Ian Williams. Air quality standards and legislations. Air Pollution. 2018; ():603-645.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air quality standards and legislations." Air Pollution , no. : 603-645.
Abhishek Tiwary; Ian Williams. Indoor air quality. Air Pollution 2018, 289 -311.
AMA StyleAbhishek Tiwary, Ian Williams. Indoor air quality. Air Pollution. 2018; ():289-311.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Indoor air quality." Air Pollution , no. : 289-311.
Abhishek Tiwary; Ian Williams. Mobile sources. Air Pollution 2018, 163 -228.
AMA StyleAbhishek Tiwary, Ian Williams. Mobile sources. Air Pollution. 2018; ():163-228.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Mobile sources." Air Pollution , no. : 163-228.
Abhishek Tiwary; Ian Williams. Particulate matter. Air Pollution 2018, 85 -137.
AMA StyleAbhishek Tiwary, Ian Williams. Particulate matter. Air Pollution. 2018; ():85-137.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Particulate matter." Air Pollution , no. : 85-137.
Abhishek Tiwary; Ian Williams. Air pollution modelling. Air Pollution 2018, 313 -359.
AMA StyleAbhishek Tiwary, Ian Williams. Air pollution modelling. Air Pollution. 2018; ():313-359.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air pollution modelling." Air Pollution , no. : 313-359.
Abhishek Tiwary; Ian Williams. Air quality experiments. Air Pollution 2018, 647 -668.
AMA StyleAbhishek Tiwary, Ian Williams. Air quality experiments. Air Pollution. 2018; ():647-668.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air quality experiments." Air Pollution , no. : 647-668.
Abhishek Tiwary; Ian Williams. Air pollution control and mitigation. Air Pollution 2018, 361 -413.
AMA StyleAbhishek Tiwary, Ian Williams. Air pollution control and mitigation. Air Pollution. 2018; ():361-413.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air pollution control and mitigation." Air Pollution , no. : 361-413.
Abhishek Tiwary; Ian Williams. Area sources. Air Pollution 2018, 139 -162.
AMA StyleAbhishek Tiwary, Ian Williams. Area sources. Air Pollution. 2018; ():139-162.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Area sources." Air Pollution , no. : 139-162.
Abhishek Tiwary; Ian Williams. Overview of air pollution. Air Pollution 2018, 1 -34.
AMA StyleAbhishek Tiwary, Ian Williams. Overview of air pollution. Air Pollution. 2018; ():1-34.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Overview of air pollution." Air Pollution , no. : 1-34.
Abhishek Tiwary; Ian Williams. Air pollution and climate change. Air Pollution 2018, 497 -538.
AMA StyleAbhishek Tiwary, Ian Williams. Air pollution and climate change. Air Pollution. 2018; ():497-538.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air pollution and climate change." Air Pollution , no. : 497-538.
Abhishek Tiwary; Ian Williams. Air pollution impacts on ozone. Air Pollution 2018, 539 -582.
AMA StyleAbhishek Tiwary, Ian Williams. Air pollution impacts on ozone. Air Pollution. 2018; ():539-582.
Chicago/Turabian StyleAbhishek Tiwary; Ian Williams. 2018. "Air pollution impacts on ozone." Air Pollution , no. : 539-582.