Sustainable Urban Land Management in the City of Hannover

Transcription

1 Sustainable Urban Land Management in the City of Hannover Development of a model for a private sector fund to mobilise brownfields Silke Kleinhückelkotten, ECOLOG-Institut Workshop, Denver, Project participants City of Hannover ECOLOG-Institute University of Lüneburg 1

2 Background goals - prevention of suburban sprawl and reduction of land consumption by re-use of brownfields - sustainable land management: social, ecological and economic effects of brownfield development problems of brownfield revitalisation - often decentral sites with unattractive dimension (B- and C-sites) - decontamination risks - complicated owner status - low interest of private owners in development of sites - only minor public funds - competition with new greenfield sites - no consistent governmental steering towards brownfield use - low interest of private investors Project Idea: a private sector fund property owners public - private communal administration PRIVATE BROWNFIELDS FUND private investors Development of a private financing model to mobilise brownfields, regarding social, ecological and economic effects brownfields restoration sale Examination of implementation conditions in the 'test city' Hannover demand 2

3 Location Niedersachsen Lower Saxony Region Hannover Hannover district City of Hannover Region Hannover in Germany Hannover Region Main characteristics of Hannover Population City District Area City ,01 km² District ,54 km² capital of Lower Saxony central functions: - administration - culture - supply - commerce - education 3

4 Working Packages 1. Improvement of data and information on brownfields 2. Development of a private sector fund model 3. Analysis of players and institutions 4. Examination of the fund model implementation and transfer conditions Instruments for sustainable land use management Brownfield information system Assessment tool: Indicators for sustainable land use and for marketability 4

5 Brownfield Information System electronic database with input from different data sources tasks/ functions: provide information for brownfield management - visualisation of data to different topics (GIS) - analysis and statistics of brownfields pool (monitoring) - characteristics/data sheets of sites - search for brownfields (size, position, infrastructure ) target group: local (regional) administrations - environment, urban planning, economic promotion application status: pilot version tested by the Hannover administration transfer challenge: compatability with existing systems Brownfield Information System Brache: ID, Name Stadtbezirk, Stadtteil, Baublock FNP: Art der Nutzung Bebauungsplan ÖPNV: Stadtbahn- Haltepunkte A: Abfrage aus vorhandenen Daten GIS data (Geometrien und Sachdaten) B: Informationen aus Datenbank Brownfield data base (Einträge, Ergebnisse von Recherchen) 5

6 Assessment tool Assessment of marketability classification of sites (A: marketable/profitable, B: developable (with some effort), C: non-profitable) - Indicators: position (centrality), size, fit, contamination, infrastructure, attractivity, usability, owner status, availability, competition with other sites, demand Assessment of sustainability of site development assessment of sites to identify the most sustainable future use comparison of different sites to identify those with the largest to contribution to sustainable urban development Assessment scheme possible fund sites sustainable, marketable Sustainability of site development not sustainable, not marketable marketability 6

7 Indicators for sustainable settlement Base: Aalborg Commitments with reference to sustainable settlement - Natural common goods - Planning and design - Better mobility, less traffic - Local action for health - Vibrant and sustainable economy - Social equity and justice Indicators to measure ecological, social and economic effects of site development (given a certain future use) Developed in a discussion process with communal experts in different fields (environment, urban planning, economic promotion) Weighting of goals and sub-goals (represented by indicators) by communal experts Examples: Goals and sub-goals Goal: reduce primary energy consumption, and increase the share of renewable energies Extend solar energy use Enforced use of local heat Extend community heating Promotion of ecomobility Goal: secure good quality and socially integrated housing and living conditions and regenerate disadvantaged areas Contribution to social inclusion Improvement of access to public services, education, employment opportunities, training, information, and cultural activities Contribution to good balance of jobs, housing and services Promotion of residential use in city centres 7

8 Assessment procedure Estimation of indicators by communal experts (in groups or seperately), scale: -2 (negative) to +2 (positive) Weighting the indicator values, using the weight factors of goals and sub-goals Adding all goal values for the ecological, social and economic dimension seperately and scaling to ensure equal weight for each dimension Sustainability assessment of an exemplary brownfield weighted indicators 6,00 5,00 4,00 3,00 2,00 1,00 0,00-1,00-2,00-3,00-4,00-5,00 Solarenergie Nahwärme Fernwärme Umweltverbund Versiegelung Biotope öffentliche Grünflächen private Gärten Bodenqualität schützenswerte Böden tox. u ökotox. Immissionen Immissionen Emissionen Güterverkehr Frischluftentstehungsgebiete Frischluftschneisen Schallimmissionen elektromagnet. Immissionen Verdichtete Bebauung Städtebauliche Integration Aufwertung Freiraumangebot Nahversorgung Kultur- u Bildung Mischung Wohnen Arbeiten Zentrumsnahes Wohnen bedeuts. Gebäude ÖPNV-Erschließung Rad-Erreichbarkeit Güterverkehrsanbindung Personenverk.anbindung Synergieeffekte Attraktivität Umfeld Einkommenssteuer Gewerbesteuer andere Abgaben Verkaufserlös Wertsteigerung Nachbarfl. Investitions- u. Folgekosten -6,00 ecological social econoimic 8

9 Assessment: Sustainability of site development ecological social econoimic Assessment: Sustainability of site development and marketability sustainability marketability 9

10 Applicability - transferability easy adaption by local and regional governments - addition or deletion of goals and sub-goals (indicators) - weighting of goals and sub-goals pre-conditions - detailed information for each site to be assessed - willingness to invest time and money into collection of data and site assessment - sustainable land management has to be acknowledged as a main target of urban planning and development Summary: Sustainable land management in the city of Hannover (NFM-H) Brownfield Information System Assessment tool for marketability and sustainability of site development - user: local and regional governments (in particular: administration) - level of application: local and regional - state of development: applied by the administration of Hannover in the context of the project (pilot version) - international transferability: given - pre-conditions: detailed site information 10