Your search found 4 records
1 Maheshwari, B.; Purohit, R.; Malano, H.; Singh, V. P.; Amerasinghe, Priyanie. (Eds.) 2014. The security of water, food, energy and liveability of cities: challenges and opportunities for peri-urban futures. Dordrecht, Netherlands: Springer. 489p. (Water Science and Technology Library Volume 71)
Water security ; Food security ; Food production ; Food supply ; Energy conservation ; Agriculture ; Periurban areas ; Urban areas ; Urbanization ; Rural areas ; Hydrological cycle ; Models ; Sustainable development ; Social aspects ; Water footprint ; Water supply ; Water use ; Water demand ; Water availability ; Catchment areas ; Solar energy ; Carbon cycle ; Sanitation ; Health hazards ; Malnutrition ; Milk production ; Decentralization ; Wastewater management ; Wastewater treatment ; Excreta ; Waste treatment ; Nutrients ; Horticulture ; Labour mobility ; Climate change ; Knowledge management ; Greenhouse gases ; Emission reduction ; Land use ; Biodiversity ; Case studies / India / Australia / Ghana / Iran / West Africa / Ethiopia / Uganda / Africa South of Sahara / Senegal / Bangladesh / Melbourne / Tamale / Shiraz / Sydney / Addis Ababa / Accra / Hyderabad / Kampala / Dakar / Dhaka / Udaipur / Bharatpur / Tigray Region / Rajasthan / Rajsamand District / South Creek Catchment
(Location: IWMI HQ Call no: IWMI, e-copy SF Record No: H046685)
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2 Malano, H.; Arora, M.; Rathnayaka, K. 2014. Integrated water cycle modelling of the urban/peri-urban continuum. In Maheshwari, B.; Purohit, R.; Malano, H.; Singh, V. P.; Amerasinghe, Priyanie. (Eds.). The security of water, food, energy and liveability of cities: challenges and opportunities for peri-urban futures. Dordrecht, Netherlands: Springer. pp.11-26. (Water Science and Technology Library Volume 71)
Hydrological cycle ; Models ; Resource allocation ; Water supply ; Water demand ; Wastewater ; Water allocation ; Groundwater ; Urban areas ; Periurban areas ; Land use ; Urbanization ; Catchment areas ; Case studies / Australia / Melbourne / Western Sydney / South Creek Catchment
(Location: IWMI HQ Call no: IWMI Record No: H047017)
The world is undergoing an intensive process of urbanisation. In 2008, for the first time in history, over half of the world’s population was living in urban and peri-urban areas. It is estimated that this number will increase to 5 billion by 2030 with most of this growth occurring on the edges of mega-cities. Smaller cities are also undergoing large transformations. Urbanisation can bring opportunities for people to improve their standard of living and access to education and other services but it can also bring and concentrate poverty in developing countries where most of this urban growth is occurring. Increased urbanisation presents planners and policy makers with many challenges, foremost among them, competition for land and water resources with other sectors such as agriculture. Critical to our capacity to develop a sound urban transformation policy is our ability to integrate science to support the formulation of sustainable planning strategies. Increasing competition for water in many regions of the world provides an impetus for increasing use of water saving and replacement techniques, such as water reuse and recycling and urban runoff harvest. This new paradigm requires an improved capability for integrated modelling approaches to analyse the whole-of-watercycle. Such an approach involves the integration of the various sub-systems— Catchment (surface-groundwater), water supply systems, wastewater, water allocation, internal recycling, decentralised treatment and storm water harvesting. Adding to this system complexity is the need to consider water quality as a constraining factor when using a fit-for-purpose approach to integrated urban water management (IUWM). This paper focuses on the challenges and opportunities involved in modelling the urban/peri-urban water cycle for planning of urban and peri-urban systems, including spatial and temporal scale and integration of hydrologic, water allocation with differential water quality across catchment and political divisions. Case studies are used to illustrate the use of integrated water modelling to inform a scenario planning approach to integrated water resource management in an urban/peri-urban context. In this analysis, two main constraints to effective modelling are identified—Lack of model integration and lack of data in the appropriate time and spatial scale often stemming from the lack of a robust data monitoring program of the entire water cycle. A framework for integration of water system modelling with economic modelling is presented.
3 Singh, R.; Maheshwari, B.; Malano, H. 2014. Securing water supply in western Sydney: an analysis of water use, demand and availability in the South Creek catchment. In Maheshwari, B.; Purohit, R.; Malano, H.; Singh, V. P.; Amerasinghe, Priyanie. (Eds.). The security of water, food, energy and liveability of cities: challenges and opportunities for peri-urban futures. Dordrecht, Netherlands: Springer. pp.121-136. (Water Science and Technology Library Volume 71)
Water security ; Water supply ; Water use ; Water demand ; Water availability ; Hydrological cycle ; Strategy planning ; Land use ; Urbanization ; Climate change ; Suburban agriculture ; Irrigation water ; Population growth ; Catchment areas / Australia / Western Sydney / South Creek Catchment
(Location: IWMI HQ Call no: IWMI Record No: H047024)
Increasing urbanisation and climate change uncertainties are putting pressure on regional authorities to revisit water management strategies in Western Sydney (Australia). This chapter examines water use patterns, demand and supply options in the South Creek catchment—a typical peri-urban catchment in Western Sydney. If present water management practices are continued, the water demand in the catchment is estimated to be more than double, growing from 53 GL/yr under the ‘current’ scenario, to 107 GL/yr under the ‘future’ scenario representing the expected conditions around the year 2025. Most of this increase will be due to residential and non-residential water use, followed by increases in irrigation requirements for recreational space (parks and golf courses). The macro water use, demand and availability analysis suggests that nearly 50 % of the ‘current’ and 47 % of the ‘future’ potable water demand could be replaced with non-potable water. The potential availability of non-potable water resources is estimated to be more than double of the potential demand for non-potable water in the catchment. This provides an opportunity to meet the region’s domestic, industrial, agricultural and environmental water demands provided all water resources are integrated, used and reused in a harmonised fashion. The stormwater and wastewater is to be seen as a ‘resource’, rather than a ‘waste’ in this new paradigm of integrated water supply management.
4 Davidson, B.; Malano, H.; Hellegers, P.; George, B.; Nawarathna, B. 2014. Valuing the water used in peri-urban regions of Hyderabad, India and in western Sydney, Australia. In Maheshwari, B.; Purohit, R.; Malano, H.; Singh, V. P.; Amerasinghe, Priyanie. (Eds.). The security of water, food, energy and liveability of cities: challenges and opportunities for peri-urban futures. Dordrecht, Netherlands: Springer. pp.463-474. (Water Science and Technology Library Volume 71)
Periurban areas ; Water rates ; Water use ; Waste management ; Water distribution ; Water allocation ; Economic value ; Domestic water ; Industrial uses ; Agricultural sector ; Catchment areas / Australia / India / Western Sydney / Hyderabad / South Creek Catchment
(Location: IWMI HQ Call no: IWMI Record No: H047054)
Economic theory suggests that resources should be employed in different sectors to the point where their marginal values are equal. Yet what has been observed in many instances is that the marginal values of a resource tend to differ, depending on what they are used for. While this occurs for a variety of reasons, it is argued in this paper that the observable relative differences in the marginal values of a resource are a measure of the pressures forcing a reallocation of those resources within a region. This issue is most acute in peri-urban regions (those places where cities and the rural environment meet) as the competition between a declining agricultural sector and the growing domestic and industrial sectors is most intense. The argument arises as to what extent is the pressure to transfer resources between these declining and expanding sectors. To answer that question it is necessary to value the resource in question in a consistent and comprehensive manner across all sectors. Once done, the forces exerted on the resource can be gauged by observing the relative differences in the values placed on it in each use. The purpose of this paper is to present the results of a method that has been used to undertake this task with respect to the allocation of water resources. However, analyzing this question in the water sector has been stymied by the fact that the value of water deployed cannot be compared easily with that allocated to other sectors. The approach taken is an extension of the Residual Method that is used to calculate the marginal value product of water used in each crop and then aggregated to obtain the total value of water allocated to the agricultural sector as a whole. These results are then compared to the more conventionally obtained values of water used in other sectors. The results presented in this paper were drawn from research that has been published on two very different peri-urban sites, in Western Sydney, Australia and in Hyderabad, India. It can be concluded that despite the differences in the circumstances, conditions and concerns of stakeholders, the approach is robust enough to be used in a variety of situations where the competition for water between sectors exists. It was found that the value of water used for domestic purposes is significantly greater than that deployed to the agricultural sector in both peri-urban regions. In addition, it does not matter that the quantities used in the urban areas for domestic and industrial uses are relatively small when compared to those in the agricultural sector (as is the case in Hyderabad) or not (as in the case in Western Sydney). Just like other resources (principally land) it is inevitable that in peri-urban regions water will be and should be allocated to the use that it is most valued; towards urban expansion and away from agriculture.
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