Watershed modeling for stream

Transcription

1 USGS GLRI Programs U.S. Department of the Interior U.S. Geological Survey

2 USGS Gaging Stations

3 Watershed modeling for stream ecosystem management Develop a scientific framework for water- withdrawal management based on ecological flows Estimation of ungaged g flows Stream classification: flow, temperature, fish distribution and abundance Ecology (fish) flow relations Streamflow depletion by wells: assessment of methods across the region Identification of impacted areas could be used for restoration targets

4 Analysis of Flows in Networks of Channels Applying AFINCH method (Holtschlag, 2009) to estimate time series of monthly flows for all reaches in the 1:100,000-scale NHDPlus v.2 dataset Monthly flows from Incorporates major water withdrawals and augmentations (for example, dam storage and release documented in annual data reports) Uses data from Great Lakes Aquatic GAP project and relates GL GAP data to NHDPlus

5 Mapper to Visualize Flow Estimates

6 Nutrient and Sediment Loadings 30 monitoring sites installed during winter and spring of equipped with automatic water samplers multi-parameter water-quality sondes transmit near-real-time to Internet. Sites were already equipped with equipment to measure flow.

7 30 sites with real-time flow and QW

8 Nutrient and Sediment Loadings - 2 Monthly fixed-interval samples for nutrients, hl id d d d di t chloride, and suspended sediment. Stormflow samples: 6 per year. 15-minute sonde readings: Temperature ph Dissolved oxygen Specific conductance Turbidity

9 Information and Tools Baseline information on nutrient and sediment concentrations. ti Potential load changes throughout the Great Lakes. Support for measuring restoration progress on major tributaries. Continuous estimates of parameters, reduce # discrete samples needed Infrastructure to monitor long-term QW trends.

10 All real time monitoring available at:

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13 Climate change and tib tributary t flow modeling

14 C. botulinum grows in anoxic, nutrient-rich rich environments Exact sites of toxin production unknown Toxin production may occur in sloughed Cladophora Trophic pathways from sediments to birds unknown May be related to invasives (dreissenids dreissenids, gobies)

15 Great Lakes scientists are asking ecosystem level questions, at different spatial scales Deepwater Rivermouth Coastal wetland Great Rivers Beaches Terrestrial

16 Linking Science Across Habitats Holistic, systems level approach to ecosystem management Unify ideas and language among Great Lakes manager and scientists Tool that assists Great Lakes programs assess the state of the ecosystem, science needs, and management strategies

17 Proposed Framework 1. Identify key processes that influence ecosystem health in the Great Lakes Open Lake Coastal/Nearshore Watershed 2. Related Processes to specific goals, issues, management concerns, etc. o Example: Lake Michigan LaMP goals, 3 Determine gaps in monitoring and our 3. Determine gaps in monitoring and our understanding of key processes that limit our ability to attain these goals

18 Human Footprint Climate and Geology Open lake processes Geomorphic Coastal/ nearshore processes Geomorphic Watershed processes Geomorphic Hydrologic Hydrologic Hydrologic Biological Biological Biological Lake Michigan ecosystem

19 Thank You