State of michigan 3DHP hydrography project - lower peninsula and eastern upper peninsulaproject period: 06 13 2024 - 06 12 2026 project abstract: project abstract summarystate of michigan 3DHP…

State of michigan 3DHP hydrography project - lower peninsula and eastern upper peninsulaproject period: 06 13 2024 - 06 12 2026 project abstract: project abstract summarystate of michigan 3DHP hydrography project - lower peninsula and eastern upper peninsulathe state of michigan has launched a statewide hydrography improvement project that will produce flowlines, water bodies and water area features following current USGS specifications for the 3D national hydrography program data to be integrated into the national map. The funding for this project will support the continued elevation-derived hydrography data development in the northern lower peninsula watersheds, continuing around the saginaw BAY, south through the southern eastern michigan watersheds, and eastern upper peninsula. These project areas will provide a diverse range in topography: from gentle rolling hills to flat heavily drained agricultural fields, from sandy soils to clay soils, and both rural and urban areas. Michigan is a state with over 11,000 inland lakes and abundant river and stream networks, so having a robust hydrography data layer is critical for organizations and programs that need to leverage the location-based aspects of GIS hydrography datasets. Programs dependent on an accurate and well-maintained hydrography dataset include invasive species, habitat management and modeling, land and forest management, wetland mitigation, nutrient loading, endangered species, coastal management, and fish stocking. Hydrography data is critical for emergency management specifically flood management and response, wildfire protection, and spill response. Critical infrastructure and assets such as dams, culverts, water, sewer, stormwater, bridges, roads, trails, rail benefit from more accurate hydrography data for better predictive flow modeling to assess impacts to infrastructure based on changes in flow volumes and water levels. The project activities will include leveraging the existing statewide quality level 2 light detection and ranging (lidar) to develop digital elevation models to support the processes to develop the more accurate GIS hydrography data for the project area. This data development process includes the collection of any available GIS-based culvert data from stakeholders to ensure hydro-enforcement of the new hydrography networks. Lakes and ponds will be collected down to an approximately 0.4 acre threshold. The data development activities will include stream delineation, flow thresholding, AMD data smoothing leading to a topologically connected network that includes elevation values on all of the features. Quality control steps are included within each process of data development and as part of the hydrologic unit deliverable preparation. The final deliverables for the project will be the hydrography river and stream flowlines, water bodies, and water area features for the level 8 hydrologic units defined in this project area. Data for these project areas not only support dozens of programs across multiple state agencies but will support other federal, state, regional and local government stakeholders. The michigan hydrography program currently coordinates the priority areas based on mutual needs and collaboration across various stakeholders for both private and public sectors. Examples of coordination efforts with other programs include, but are not limited to, wetlands mapping projects, flood resiliency projects, water resource management projects and infrastructure planning projects.