The environmental benefits of water recycling and reuse

2003 ◽  
Vol 3 (4) ◽  
pp. 1-10 ◽  
Author(s):  
J. Anderson
Keyword(s):  
Fresh Water ◽  
Water Conservation ◽  
Urban Areas ◽  
Water Reuse ◽  
Water Cycle ◽  
Environmental Water ◽  
Environmental Benefits ◽  
Human Needs ◽  
Water Diversions ◽  
Agriculture Industry

The world's supply of fresh water is finite and is threatened by pollution. Rising demands for water to supply agriculture, industry and cities are leading to competition over the allocation of limited fresh water resources. This paper examines how water reuse increases the available supply of water and enables human needs to be met with less fresh water. The paper is illustrated with water reuse case studies in agriculture, urban areas, industry and water resource supplementation in Australia and other countries. The links between water reuse and sustainable water management are examined. Water conservation and water reuse produce substantial environmental benefits, arising from reductions in water diversions, and reductions in the impacts of wastewater discharges on environmental water quality. Some examples are presented demonstrating the environmental benefits in quantitative terms. The paper also describes the economic and environmental benefits identified in a number of recent integrated water cycle planning studies in Australia.

Water reuse in Japan

2001 ◽  
Vol 43 (10) ◽  
pp. 17-23 ◽  
Author(s):  
M. Ogoshi ◽  
Y. Suzuki ◽  
T. Asano
Keyword(s):  
Urban Areas ◽  
Water Reuse ◽  
Environmental Water ◽  
Current Status ◽  
Mean Annual Precipitation ◽  
Water Supply Systems ◽  
Wastewater Reclamation ◽  
Large Cities ◽  
Water Demands ◽  
Rapid Economic Growth

Even though Japan has mean annual precipitation of 1,714 mm and hundreds of dams and reservoirs constructed, frequent and severe droughts have occurred in wide regions of the country. Because of rapid economic growth and concentrations of population in urban areas, water demands in large cities have stressed reliability of water supply systems and necessitated the development of new water resources with considerable economic and environmental costs. To alleviate these situations, wastewater reclamation and reuse have been implemented widely in major cities. This paper summarizes the current status of water reuse in Japan and discusses dominant uses of reclaimed water, emphasizing non-potable urban applications such as toilet flushing, industrial reuse, and environmental water.

Blueprint for a greener city: growth need not costthe earth

2005 ◽  
Vol 52 (9) ◽  
pp. 61-67 ◽  
Author(s):  
J.M. Anderson
Keyword(s):  
Water Conservation ◽  
Water Reuse ◽  
Energy Use ◽  
Rainwater Harvesting ◽  
River System ◽  
Environmental Benefits ◽  
System Capacity ◽  
Urban Water ◽  
Capital Costs ◽  
Alternative Water

The current human use of global natural resources exceeds the long-term sustainable capacity of the planet. New and more sustainable ways of building cities and providing urban water services are needed. The Australian city of Sydney is expected to grow by more than 1 million people over the next 30 years. Water use from the Hawkesbury-Nepean River system already exceeds system capacity. Current proposals to allocate a greater proportion of low flows to meet environmental flow needs will limit urban water allocations and require the development of more efficient water and sewerage systems for new and existing urban development. This paper presents a hypothetical case study of how water supply and sewerage services might be provided for an additional 1 million people over a 25-year period. It compares traditional service provision with alternative scenarios incorporating water conservation measures, rainwater harvesting and water reuse. The paper presents both economic and environmental comparisons. The economic comparisons include valuations of environmental externalities in the form of environmental levies. It shows that the extra capital costs of water conservation, alternative water sources and water reuse scenarios are offset by operating savings and environmental benefits. Ecological footprints are reduced because of lower water diversions, discharges, energy use and CO2 emissions. The paper also discusses the implication of alternative infrastructure ownership and water pricing arrangements, and the opportunities to create incentives for additional investment in water conservation and reuse projects.

scholarly journals CRITICAL STRATEGIES FOR CONSTRUCTION PLAYERS IN THE ADOPTION OF BIOPHILIC CITY CONCEPT IN MALAYSIA

2020 ◽  
Vol 18 (11) ◽  
Author(s):  
Khairul Zahreen Mohd Arof ◽  
Syuhaida Ismail ◽  
Chitdrakantan Subramaniam ◽  
Shamila Azman ◽  
Wan Nurul Mardiah Wan Mohd Rani ◽  
...  
Keyword(s):  
Urban Planning ◽  
Urban Communities ◽  
Water Conservation ◽  
Urban Areas ◽  
Public Services ◽  
The Public ◽  
Human Needs ◽  
Living Organisms ◽  
Effective Water ◽  
Green City

Around 2.5 billion individuals will be living in urban areas by 2050. Two out of three individuals are going to live in urban communities or other urban focuses, featuring sustainable urban planning and public services. A biophilic city concept which is a sister term of the green city innately affiliates human being to other living organisms. Apart from adhering to human needs, the concept is the economical among other green city concepts. However, biophilic city concept is still an alien term to construction players and the public. The paper aims to propose and evaluate the critical strategies for construction players in the adoption of the biophilic city concept in Malaysia. 173 respondents consisting of government agencies, developers, consultants and contractors were involved in a questionnaire survey. 81 out of 107 strategies were accepted as the critical strategies in adopting the biophilic city concept. Among the strongest strategies are (1) effective water conservation in biophilic city project; (2) acknowledging biophilic city concept adoption publicly; and (3) adequate material resource availability for the biophilic city project. These strategies fall under three different items, namely; (1) sustainability in the biophilic city project; (2) awards and recognition for biophilic city concept adoption; and (3) organisation in the biophilic city project, respectively. Commitment of all construction players are crucial crucial towards inclusive, sustainable urban planning and public services.

Urban water recycling

2005 ◽  
Vol 51 (8) ◽  
pp. 83-89 ◽  
Author(s):  
T. Asano
Keyword(s):  
Water Resources ◽  
Pollution Control ◽  
Rural Areas ◽  
Urban Areas ◽  
Water Reuse ◽  
Water Cycle ◽  
Integrated Water Resources Management ◽  
Resources Management ◽  
Vital Component ◽  
Urban And Rural Areas

Increasing urbanization has resulted in an uneven distribution of population, industries, and water in urban areas; thus, imposing unprecedented pressures on water supplies and water pollution control. These pressures are exacerbated during the periods of drought and climatic uncertainties. The purpose of this paper is to summarize emergence of water reclamation, recycling and reuse as a vital component of sustainable water resources in the context of integrated water resources management in urban and rural areas. Water quality requirements and health and public acceptance issues related to water reuse are also discussed. Reclaimed water is a locally controllable water resource that exists right at the doorstep of the urban environment, where water is needed the most and priced the highest. Closing the water cycle loop not only is technically feasible in agriculture, industries, and municipalities but also makes economic sense. Society no longer has the luxury of using water only once.

Towards sustainability in water recycling

2004 ◽  
Vol 50 (2) ◽  
pp. 1-7 ◽  
Author(s):  
L. Sala ◽  
M. Serra
Keyword(s):  
Water Reuse ◽  
Water Resource Management ◽  
Water Cycle ◽  
Point Of View ◽  
Environmental Benefits ◽  
Water Recycling ◽  
Wastewater Reclamation ◽  
Water Demands ◽  
Wastewater Reclamation And Reuse ◽  
The Impact

Those like us who believe in and spread the gospel of planned wastewater reclamation and reuse usually emphasize that this is a step towards sustainability in water resource management, but this is something that is very seldom analyzed. This paper discusses, from a critical point of view, issues such as goals in water reuse and influence on water demands, ecological analysis of the cycle of the main pollutants, health aspects and treatment requirements, energy consumption and measurable environmental benefits, in order to provide a set of criteria to assess sustainability in water recycling projects and to decrease the impact of the cultural water cycle on the environment.

scholarly journals Is Small Scale Desalination Coupled with Renewable Energy a Cost-Effective Solution?

2021 ◽  
Vol 11 (12) ◽  
pp. 5419
Author(s):  
George Kyriakarakos ◽  
George Papadakis
Keyword(s):  
Renewable Energy ◽  
Fresh Water ◽  
Cost Effective ◽  
Water Source ◽  
Energy System ◽  
Environmental Benefits ◽  
Small Scale ◽  
Ice Caps ◽  
Human Needs ◽  
Interesting Approach

Water and energy are two of the most important inputs for a community to thrive. While water is dominant on earth, only 2.5% of the water is fresh water and over 98% of that water is either ground water or locked up in glaciers and ice caps. Therefore, only about 1.2% of all the freshwater is surface water which is able to meet human needs. About 2 billion people currently do not have sufficient access to fresh water. One of the solutions deployed in the last decades for island and coastal areas has been desalination. Desalination of seawater and brackish groundwater is commercially available and still a fast-advancing technology. The decreasing cost of renewable energy coupled with strategies based on renewables for powering populations without access to electricity and policies for complete decarbonization of the economy such as the European Green Deal make the combination of renewables and desalination a really interesting approach. This paper investigates combinations of small-scale RO desalination systems which are able to produce up to a few thousand m3 of desalinated water per day coupled with photovoltaic (PV) and wind energy systems, both in grid-connected, as well as in autonomous scenarios. The results show that RO desalination coupled with renewables can address cost-effectively the current issues in terms of water scarcity, while minimizing the environmental footprint of the process. In this paper, it has been showcased that desalination powered by renewables can be deployed in practically any location on earth having access to sea or a brackish water source. The results show that even for grid-connected systems it is more cost-effective and profitable to include a renewable energy system to power the plant, apart from the corresponding environmental benefits.

Spatiotemporal Changes of Riverbed and Surrounding Environment in Yongding River (Beijing section) in the Past 40 Years

2020 ◽  
Vol 64 (4) ◽  
pp. 40407-1-40407-13 ◽  
Author(s):  
Ran Pang ◽  
He Huang ◽  
Tri Dev Acharya
Keyword(s):  
Economic Development ◽  
Water Conservation ◽  
Human Activities ◽  
Urban Areas ◽  
Water Volume ◽  
Cropland Area ◽  
The Past ◽  
Surrounding Environment ◽  
Spatiotemporal Changes ◽  
Yongding River

Abstract Yongding River is one of the five major river systems in Beijing. It is located to the west of Beijing. It has influenced culture along its basin. The river supports both rural and urban areas. Furthermore, it influences economic development, water conservation, and the natural environment. However, during the past few decades, due to the combined effect of increasing population and economic activities, a series of changes have led to problems such as the reduction in water volume and the exposure of the riverbed. In this study, remote sensing images were used to derive land cover maps and compare spatiotemporal changes during the past 40 years. As a result, the following data were found: forest changed least; cropland area increased to a large extent; bareland area was reduced by a maximum of 63%; surface water area in the study area was lower from 1989 to 1999 because of the excessive use of water in human activities, but it increased by 92% from 2010 to 2018 as awareness about protecting the environment arose; there was a small increase in the built-up area, but this was more planned. These results reveal that water conservancy construction, agroforestry activities, and increasing urbanization have a great impact on the surrounding environment of the Yongding River (Beijing section). This study discusses in detail how the current situation can be attributed to of human activities, policies, economic development, and ecological conservation Furthermore, it suggests improvement by strengthening the governance of the riverbed and the riverside. These results and discussion can be a reference and provide decision support for the management of southwest Beijing or similar river basins in peri-urban areas.

Urban Greening and Human-Wildlife Relations in Philadelphia: From Animal Control to Multispecies Coexistence?

2020 ◽  
Vol 29 (1) ◽  
pp. 67-87 ◽  
Author(s):  
Christian Hunold
Keyword(s):  
Public Health ◽  
Green Infrastructure ◽  
Urban Areas ◽  
Urban Runoff ◽  
Urban Wildlife ◽  
Wildlife Habitat ◽  
Wild Animals ◽  
Urban Greening ◽  
Human Needs ◽  
Animal Control

City-scale urban greening is expanding wildlife habitat in previously less hospitable urban areas. Does this transformation also prompt a reckoning with the longstanding idea that cities are places intended to satisfy primarily human needs? I pose this question in the context of one of North America's most ambitious green infrastructure programmes to manage urban runoff: Philadelphia's Green City, Clean Waters. Given that the city's green infrastructure plans have little to say about wildlife, I investigate how wild animals fit into urban greening professionals' conceptions of the urban. I argue that practitioners relate to urban wildlife via three distinctive frames: 1) animal control, 2) public health and 3) biodiversity, and explore the implications of each for peaceful human-wildlife coexistence in 'greened' cities.

The implications of climate change on residential water use: a micro-scale analysis of Portland (OR), USA

2012 ◽  
Vol 3 (3) ◽  
pp. 225-238 ◽  
Author(s):  
Vivek Shandas ◽  
Meenakshi Rao ◽  
Moriah McSharry McGrath
Keyword(s):  
Climate Change ◽  
Water Use ◽  
Environmental Sustainability ◽  
Water Conservation ◽  
Urban Areas ◽  
Future Climate ◽  
Metropolitan Region ◽  
Study Region ◽  
Residential Water Use ◽  
Residential Water

Social and behavioral research is crucial for securing environmental sustainability and improving human living environments. Although the majority of people now live in urban areas, we have limited empirical evidence of the anticipated behavioral response to climate change. Using empirical data on daily household residential water use and temperature, our research examines the implications of future climate conditions on water conservation behavior in 501 households within the Portland (OR) metropolitan region. We ask whether and how much change in ambient temperatures impact residential household water use, while controlling for taxlot characteristics. Based on our results, we develop a spatially explicit description about the changes in future water use for the study region using a downscaled future climate scenario. The results suggest that behavioral responses are mediated by an interaction of household structural attributes, and magnitude and temporal variability of weather parameters. These findings have implications for the way natural resource managers and planning bureaus prepare for and adapt to future consequences of climate change.

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