Commercial rooftop greenhouses

Proksch, Gundula; Ianchenko, Alex

doi:10.1016/b978-0-12-820286-9.00009-1

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…According to extensive literature reviews, roof areas larger than 4000 m 2 were applied for hightech greenhouse planting, and others larger than 5 m 2 for open-air systems. The vegetable yield (Y) of rooftop greenhouse production was obtained from previous studies 12,44,45 , and the yield for open-air production was taken from the Global Agro-Ecological Zoning database. The annual vegetable production in city k is measured with the equation below:…”

Section: Productivity Of Ra and Rpvmentioning

confidence: 99%

Optimal use of urban rooftops can synergize food and energy production objectives

Hu,

Yang,

et al. 2024

Preprint

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Urban rooftop agriculture (RA) and photovoltaics (RPV) offer sustainable solutions for energy-food systems in cities but compete for limited rooftop space. We explore the potential benefits (provisioning, economic, and environmental) and allocation strategy of RA and RPV across 13 million buildings in 124 Chinese cities, considering building height, age, function, rooftop type and occupation, and regional productivity. We found that RA yields superior economic benefits, while RPV excels in cradle-to-grave greenhouse gas emission reduction benefits. Prioritizing either RA or RPV compromises 70–100% of the above benefits brought by the other. An optimized allocation to maximize the overall benefits would retain >55% of their potential, meeting 14% (mean, 0.5–99% across cities) of urban vegetable needs and 5% (0.5–27% across cities) of the electricity needs. Such a scenario requires allocating 54% (varied 4–99% across cities) of the flat rooftop area to RA, and all remaining rooftops to RPV. Together, the productivity from rooftop RA and RPV are equivalent to 2.3×103 km2 of cropland and 86 Mt of coal, contribute 1.5% of the national GDP and reduce 1.6% of national greenhouse gas emissions (account for 0.1–33% of city levels), requiring considerable water (up to 18% of urban residential water use) and material demand (e.g., totalling 9 kt silver). By elucidating the benefits and resource costs of rooftop utilization, our findings can support synergetic decision-making to meet multiple sustainability goals in diverse cities.

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Section: Productivity Of Ra and Rpvmentioning

confidence: 99%

Optimal use of urban rooftops can synergize food and energy production objectives

Hu,

Yang,

et al. 2024

Preprint

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“…This system is attracting attention as a next-generation green industry to increase the food self-sufficiency rate of cities because it Land 2023, 12, 2187 2 of 17 can stably produce high-quality crops with ICT environmental control technology within a thoroughly protected space even in the event of abnormal climatic phenomena, epidemics, and pollutants, and food miles are saved. Research on RG has been conducted in various fields since the 2010s, including life-cycle environmental impact assessment, cost-benefit analysis, efficient irrigation methods, and the circular economy [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Location Selection of Urban Rooftop Greenhouses in Seoul Based on AHP and GIS

Kil,

Park,

Park

et al. 2023

Land

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With the recent increase in food demand, urban agriculture has gained attention as a way of increasing food self-sufficiency and providing recreational spaces in cities. In this study, the suitability of rooftop greenhouses (RGs), a type of urban agriculture, was analyzed by combining the analytical hierarchy process (AHP) and geographic information systems (GIS) in Seoul, the capital city of Korea. To achieve this, we derived location suitability factors through expert consultations and calculated the weights of each factor through AHP. After building the spatial data according to these factors, they were weighted and summed then scaled to a score of 0–100. The highest weight of the RG location factors was for benefit (0.1782), followed by officially assessed land prices (0.0913) and supermarket density (0.0802). The weights of supermarket density and accessibility were high because they are considered the main distribution channels. When analyzing the location of RGs by linking these results with the spatial data according to factor, we revealed that Gangseo-gu (a district of Seoul) had relatively high location suitability scores. This trend was determined to be caused by the rather low officially assessed land price, high supermarket density, and productive population. This result could prove useful when selecting the approximate locations of RGs in Seoul and for promoting food self-sufficiency in cities.

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