Showing posts with label GIS. Show all posts
Showing posts with label GIS. Show all posts
Tuesday, 8 May 2012
Delivering for Defra on Climate Change
CWSI staff Keith Weatherhead, Jerry Knox and Andre Daccache
are to support Defra’s work on adaptation to climate change by undertaking a
study on climate change impacts on land use and water demand for agriculture.
This 12 month project will deliver a GIS-based tool which enables farmers to
assess crop irrigation requirement, risks to water supply and alternatives for
adaptation, according to geographical location.
Tuesday, 21 February 2012
Resilience enhancing expansion strategies for water distribution systems: A network theory approach
Authors
Yazdani, A.a , Otoo, R.A.b , Jeffrey, P
Abstract
Planners and engineers attempting to improve the resilience of water distribution systems face numerous challenges regarding the allocation and placement of redundancy so as to reduce the likelihood and impact of asset failures and take into consideration the growing demand for clean water, now and into the future. Water distribution systems may be represented as networks of multiple nodes (e.g. reservoirs, storage tanks and hydraulic junctions) interconnected by physical links (e.g. pipes) where the connectivity patterns of this network affects its reliability, efficiency and robustness to failures. In this paper we employ the link-node representation of water infrastructures and exploit a wide range of advanced and emerging network theory metrics and measurements to study the building blocks of the systems and quantify properties such as redundancy and fault tolerance, in order to establish relationships between structural features and performance of water distribution systems. We study the water distribution network of a growing city from a developing country and explore network expansion strategies that are aimed to secure and promote structural invulnerability, subject to design and budget constraints. © 2011 Elsevier Ltd.
Yazdani, A.a , Otoo, R.A.b , Jeffrey, P
Abstract
Planners and engineers attempting to improve the resilience of water distribution systems face numerous challenges regarding the allocation and placement of redundancy so as to reduce the likelihood and impact of asset failures and take into consideration the growing demand for clean water, now and into the future. Water distribution systems may be represented as networks of multiple nodes (e.g. reservoirs, storage tanks and hydraulic junctions) interconnected by physical links (e.g. pipes) where the connectivity patterns of this network affects its reliability, efficiency and robustness to failures. In this paper we employ the link-node representation of water infrastructures and exploit a wide range of advanced and emerging network theory metrics and measurements to study the building blocks of the systems and quantify properties such as redundancy and fault tolerance, in order to establish relationships between structural features and performance of water distribution systems. We study the water distribution network of a growing city from a developing country and explore network expansion strategies that are aimed to secure and promote structural invulnerability, subject to design and budget constraints. © 2011 Elsevier Ltd.
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