# ARCADIA Project The ARCADIA Project is a pioneering initiative aimed at enhancing climate resilience in urban, rural, forest areas across Europe. By integrating advanced climate adaptation strategies, the project seeks to tackle challenges posed by climate change. ARCADIA focuses on developing innovative tools and methodologies to support local communities, practitioners and spatial planners, and policymakers in designing sustainable, climate-resilient environments. The project promotes interdisciplinary collaboration, bringing together experts from various fields to drive actionable solutions that enhance the adaptability of European cities against climate threats. ARCADIA brings together 8 European regions and communities , comprising 5 Model regions (Emilia-Romagna Italy, Zagreb and Krapina-Zagorje Croatia, Lower Austria Austria, Funen Denmark, Skàne Sweden) and 3 Fellow regions (Plovdiv, Bulgaria; Centru, Romania; Podravje, Slovenia) to accelerate the adoption of NBS and to provide access to the latest, evidence-based knowledge, tools, and services. ## Context The EU Mission on Adaptation aims to strengthen regional resilience to climate hazards. Within this context, [**CLIMAAX**](https://www.climaax.eu/) (a Horizon Europe project coordinated by Deltares) provides a **standardised Climate Risk Assessment (CRA) framework** and a supporting toolbox to help regions combine local information with pan-European reference data and scenarios. ARCADIA aligns its CRA workflow logic with this CLIMAAX approach to ensure consistency and interoperability across regions. Nature‑based solutions (NbS) and blue‑green infrastructure (BGI) play a central role in this context. The European Commission defines NbS as *“solutions that are inspired and supported by nature, which are cost‑effective, simultaneously provide environmental, social and economic benefits and help build resilience”*[climate-adapt.eea.europa.eu](https://climate-adapt.eea.europa.eu/en/eu-adaptation-policy/key-eu-actions/NbS). Such interventions bring more diverse natural features and processes into cities, landscapes and seascapes and should benefit biodiversity and support the delivery of multiple ecosystem services[climate-adapt.eea.europa.eu](https://climate-adapt.eea.europa.eu/en/eu-adaptation-policy/key-eu-actions/NbS). Because of their multi‑purpose character, NbS often deliver larger co‑benefits than conventional engineering measures[climate-adapt.eea.europa.eu](https://climate-adapt.eea.europa.eu/en/eu-adaptation-policy/key-eu-actions/NbS). However, the literature notes that increased urban biodiversity and green spaces can also generate **ecosystem disservices**, such as higher risks of zoonotic diseases, intensified urban heat islands or human disconnection from nature[frontiersin.org](https://www.frontiersin.org/journals/ecology-and-evolution/articles/10.3389/fevo.2021.791070/full). These disservices may be amplified by climate change and therefore need to be recognised and managed alongside the desired benefits[frontiersin.org](https://www.frontiersin.org/journals/ecology-and-evolution/articles/10.3389/fevo.2021.791070/full). ## Purpose of the ARCADIA Assessment Toolkit The **ARCADIA Assessment Toolkit** provides practical guidance to turn Nature-based Solutions (NbS) concepts into **executable Climate Risk Assessment (CRA) workflows**. Its purpose is to support a consistent and transparent assessment of climate risk and NbS/BGI performance through a clear chain from **data ingestion** to **indicators** and **baseline vs. NbS scenario comparison**, while keeping the workflow logic transferable across regions and tools. The Toolkit is designed as a **living resource**. This GitBook is meant to remain accessible, searchable and updatable as Innovation Labs progress, new datasets become available and supporting data services mature, without changing the core CRA logic already documented in the workflows. The Toolkit is **model-agnostic by design**. Tutorials may reference specific software stacks used in a region (including open-source, proprietary and locally adopted tools), **but the truly reusable element is the workflow structure**: required inputs, preprocessing steps, assumptions, data checks, indicator definitions and scenario-testing rules. This allows other regions to substitute equivalent tools while preserving comparability of results. The primary beneficiaries are **regions and local authorities** using CRA outputs to support adaptation planning, prioritization and NbS/BGI investment decisions. Direct users are **technical practitioners** (agencies, consultancies, research partners and municipal technical units) with basic competences in GIS/data handling and the ability to run the relevant analysis chain. For practical details on prerequisites, typical user profiles and execution notes, refer to the “intended users / disclaimer” sections within each tutorial page. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://arcadia-15.gitbook.io/cra_toolbox_2026/ctb-readme-arcadia.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.