1. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Horst Gömann & Peter Kreins Institute of Rural Studies, Federal Agricultural Research Centre, Braunschweig (FAL-LR) Elbe basin - Future Energy-Corn-Belt of Europe? - How climate change mitigation strategies induce substantial land use changes -

2. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 1.Introduction 2.Integration of agricultural economic modeling into the GLOWA-Elbe model network 3.Results for a selected scenario: “Amendment of the Renewable-Energy-Act” 4.Conclusions and Outlook Contents

3. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Objectives 1.Specification of global change scenarios for agriculture - future general conditions for agriculture - scenario hypothesis for relevant factors 2.Model based impact analyses for agriculture - regionalization of global change impacts for the Elbe basin - calculation regional changes of land use, nutrient surpluses, and income 1. Introduction

4. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Scenarios: Overview about relevant factors for agriculture Climate Changes Agricultural Sector -Developments on world markets -Luxembourg Compromise incl. policy reforms on sugar and milk markets -Decrease of support prices for agricultural products -Decoupling of premiums -Cross Compliance -European Agricultural Fund for Rural Development (EAFRD) -Development of acceptance of “Genetically Modified Organisms” Water Sector -Water Framework Directive -Regulation on Fertilization Energy Sector -“Amendment of the Renewable-Energy-Act 2004” (EEG) in Germany 1. Introduction

5. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 2. Integration of Agricultural Economic Modeling Water management (WBALMO) Water use Energy / Mining (KASIM) Households /business (HAUSHALT WASSER) Industry (INDUSTRIE WASSER) Agriculture / Irrigation Wetlands (MODAM) Development of water technologies Inflow Evaporation Irrigation Wetlands Water suppliers Industry Mining Power plants Nutrient load (MONERIS) Point source: Industry Regionalization of global change Future climate (STAR) Development of agricultural sector (RAUMIS) Economics and demography (REGE) Minimal flow for conservation Transport on inland waterways Point source: Sewage plant Diffuse source: Sealed surfaces Diffuse source: Erosion Diffuse source: Atmospheric Deposition Diffuse source: Drainage Diffuse source: Surface denudation Diffuse source: Groundwater Diffuse source / Sink: Wetlands Land use and regional water balance Hydrological cycle and crop yields (SWIM) Land use (LAND USE SCANNER) Development of energy sector (KASIM) Transport on inland waterways X1X13X15X4X3 X2 Y2 Y1 Y5 Y3 Y4 Y7 Z8 Y8 Z1 Y6 Z6 Z7 Z9 Z5 Z1 Z2 Z3 Z4 Water quality (QSim) Nutrient concentr. Phytoplankton Oxygen CAPRI

6. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 2. Integration of Agricultural Economic Modeling less than to more than 25 50 75 100 in kg per ha AA RAUMIS / CAPRI 10/2006 P. Kreins, H. Gömann 010020030050 km Regional Nitrogen Surpluses under Luxembourg Compromise RAUMIS CAPRI

7. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Background The “Amendment of the Renewable Energy Act” (EEG) aims at supporting: –sustainable energy supply –protection of nature and environment –prevention of fossil resources conflicts –further development of technologies to generate power from renewable resource –increase the share of power generation from renewable resources to 20% of total power generation in 2020 Specific support for power generation from biomass production: –guaranteed power purchase price –bonus for use of renewable primary products (6 EuroCents per kWh) –bonus for combined heat and power –bonus for use of new technologies 3. Impacts of the „Renewable-Energy-Act- Amendment in 2004”

8. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Further development of RAUMIS and scenario definition (EEG): Specification of “Energy Maize” as the major renewable primary product activity in RAUMIS Characteristics based on activity: “Fodder Maize” –approx. 20% higher yield on average –regional yields levels –input use Adjustment behavior of major cash crops: wheat or barley Producer price –22-24 Euro per t (free at biogas plant; 30% dry matter) 3. Impacts of the „Renewable-Energy-Act- Amendment in 2004”

9. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 3. Impacts of the „Renewable-Energy-Act- Amendment in 2004” Reduction in Cereal Area 010020030050 km less 2 2 to 4 4 to 6 6 to 8 greater 8 in %-points of AA Reduction in Oil Seed Area Reduction in Set Aside Area Regional Land Use Changes in the German Elbe basin 2010 vs. Reference Scenario

10. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 3. Impacts of the „Renewable-Energy-Act- Amendment in 2004” Regional Land Use Changes in the German Elbe basin in 2010 010020030050 km Energy Maize Area less 5 5 to 10 10 to 15 15 to 20 greater 20 in % of AA

11. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR 3. Impacts of the „Renewable-Energy-Act- Amendment in 2004” Impacts on agriculture in the German Elbe basin in 2010

12. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Conclusions Comprehensive GLOWA-Elbe model network is able to model complex scenarios Model network can be adapted to new developments Modeling of the Czech Elbe pursues a promising path Amendment of the EEG induces a substantial increase in biomass production with impacts on water quantity and quality Outlook Further downscaling to Hydrologic Response Units Integration of Czech Republic into the scenario analyses Feed back from hydrological models in regard to water availability for “energy maize” production: Is irrigation an option? Nutrient surpluses from renewable resources needs to be modeled Conclusions and Outlook

13. GLOWA-Elbe II Statuskonferenz 14. Dez. 2006 Potsdam Horst Gömann, FAL-LR Thank You for your attention!