The IMLAND project investigates climate change adaptation options within the agricultural sector. It focuses on the region of Northeast Lower Saxony, which is the largest irrigation area in Germany. In the first stage, we developed a qualitative System Dynamics model. The model serves to understand and analyze systemic connection between the agricultural sector and other sectors in the region. Therefore, we involved regional stakeholders within a participatory modeling framework. Following a careful stakeholder analysis and selection, we identified twenty stakeholders from the water sector, agriculture, environmental protection, and politics. We conducted individual interviews with all stakeholders. Afterward, they reconvened in the frame of a group modeling workshop to agree on a common model. The qualitative System Dynamics model synthesizes the regional knowledge of stakeholders and scientific knowledge. Consequently, we developed a method to analyze the qualitative System Dynamics model. Thereby, we identified leverage points within the model that point to climate change adaptation measures in the region.