20
August
2018

NHANRS 2018 Fall Quarterly Meeting

When:
September 20, 2018 @ 5:30 pm – 9:00 pm
Where:
The Common Man
25 Water St
Concord,NH 03301
USA
Categories:

Crossing the Blue Line – Research on NH’s Stream Maps

The National Hydrography Dataset (NHD) is a geographic network containing all water features in the country organized by a hierarchical system of watersheds called the Watershed Boundary Dataset (WBD). Everything in the NHD is connected, enabling users to trace the network to discover information along the streams and waterbodies (dams, stream gages, water quality stations, etc.). The current High Resolution NHD contains all water features on 24,000-scale USGS topographic maps. Although a remarkable achievement, many workers today require a much finer scale. With Lidar elevation data and GIS tools, we are now able to extract a stream network that represents reality to within a few meters. This method indiscriminately generates all streams on the basis of channel morphology, but cannot identify whether any given stream reach is perennial, intermittent, or ephemeral. To better evaluate these classifications, the NHGS has deployed stream permanence sensors that monitor the height of water in the channel. These methods, combined with a new NHD Markup Tool that allows the public to propose edits to the stream network, will allow the NHGS to make the NHD in New Hampshire a better product for all.users.

Presenter Bio

Joshua Keeley is a Hydrogeologist with the NHGS and serves as the New Hampshire Principle Steward of the National Hydrography Dataset (NHD). Josh specializes in glacial geology and is currently involved in surficial geologic mapping, maintaining the NHD, maintaining NHGS’s Groundwater Monitoring Network, and hydrologic modeling of NH rivers. He received his B.A. in Geology and Geological Oceanography from University of Rhode Island in 2008 and his M.S. in Geology from Idaho State University in 2011.

Download the NHANRS 2018 Fall Quarterly Meeting Flyer and mail in your registration or register online with PAYPAL.