Climate Change

Tool // Climate, Land (Food), Energy and Water Systems Approach (CLEWs)

The Climate, Land (Food), Energy and Water systems approach (CLEWs) focuses on assessing interlinkages between resource systems in order to understand how these are related with each other, where pressure points exist, and how to minimize trade-offs while potentiating synergies. The framework is applicable to different geographical scales, from global, to regional, national and urban levels. ​The tool is used and actively developed in partnership with UNDESA and the UNDP.

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The Climate, Land (Food), Energy and Water systems approach (CLEWs) focuses on assessing interlinkages between resource systems in order to understand how these are related with each other, where pressure points exist, and how to minimize trade-offs while potentiating synergies. This type of integrated assessments usually involve a strong quantification process which can be performed in different scales of complexity, either by 1) the use of accounting frameworks; 2) via the development of sectoral models (for water, energy and land use), and subsequent soft-linking of tools in an iterative process; or 3) making using of one single modelling tool that accounts for the representation of several cross- and inter-systems’ interactions. The models are then used to investigate questions related to the relevant nexus interactions.
The framework is applicable to different geographical scales, from global, to regional, national and urban levels. At the urban scale is was successfully applied to case study of New York City for the investigation of water and energy system interventions, exploring the interlinkages and cross-sectoral implications of single-resource management. These are just examples, and the questions and scenarios to be analysed are adaptable and specific to each country/region circumstances.
The tool is used and actively developed in partnership with UNDESA and the UNDP. They form integral parts of the Global OpTIMUS (Open Tools, Integrated Modelling and Upskilling for Sustainable Development) community of practice.
More information on CLEWs

Projects

The CLEWs methodology has been employed in a variety of projects that span over different scales and regions, with partner institutions across the world. The projects aim at disseminating the importance of nexus thinking for the development of integrated policies and sectoral strategies, that are sound and effectively contribute to the achievement of Sustainable Development.
More information on CLEWs projects 

CLEWs Modeling Examples

The Global CLEWS model provides useful insights about the relationships among water, energy, climate, and land and material use at the global scale. It was developed to inform Rio+20 discussions and will soon be upgraded to provide useful insights about the interlinkages among climate, land, materials, energy and water underlying the relationships among many of the Sustainable Development Goals (SDGs). The challenge of progressing towards the SDGs is best approached taking into account synergies and trade-offs among them.
More information on CLEWs models

Contact

Division of Energy System Analysis
KTH Royal Institute of Technology
Brinellvägen 68
S-100 44 Stockholm
www.desa.kth.se
​clews@desa.kth.se

Further Reading 

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Events

Conference // Week on Water for Development in August 2020

Every drop counts – but what is happening in the water sector in times of COVID-19? The Week on Water for Development (WW4D) is a virtual five-day conference from 24 to 28 August 2020, organised by the German development cooperation (GIZ), that connects relevant stakeholders around key topics on water from COVID-19 to climate change. WW4D is also part of SIWI’s Stockholm World Water Week at home 2020.

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Governance

Nexus Principles // The Water, Energy and Food security Nexus Principles

The Water-Energy-Food security Nexus Principles guide towards the application, implementation and operationalisation of the Water-Energy-Food security Nexus (WEF Nexus) approach in different contexts. The Principles were developed by practitioners based on their experience and grounded in research.

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Research

Publication // Beyond hydropower: towards an integrated solution for water, energy and food security in South Asia

By Rasul, G., Neupane, N., Hussain, A., & Pasakhala, B. (2019). This article provides an overview of current WEF-resource challenges in South Asia, and delivers potential angles for improvements that could be derived by implementing the Nexus approach, with a focus on hydroelectrial power and development of waterways. This is an excerpt of the original article, which can be accessed below.

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