Images

New ice formations observed forming below weir at Des Lacs River near Foxholm, North Dakota.

Ice formation on Big Muddy Creek near Almont, ND (USGS streamgage 06347500;
https://waterdata.usgs.gov/nd/nwis/inventory/?site_no=06347500&agency_cd=USGS&) on March

Staff from the U.S. Geological Survey, Lower Brule Sioux Tribe Environmental Protection Office, and Oglala Lakota College set up equipment in preparation for use of Ground-based Light Detection and Ranging (LiDAR). On Feb. 28-March 1, 2011,  LiDAR was used to scan exposed banks as part of the Missouri River bank erosion study on the Lower Brule Reservation.

Increase flow in the Des Lacs River and warmer temperatures probably caused instability in the area of the ice spikes causing them to disappear.

Several smaller ice spikes merge to create a large ice spike. Flow is 5.59 cubic feet per second.

Estimated height of large ice spike is about 7 feet.

Ice formation on Apple Creek near Menoken, ND (USGS streamgage 06349500;
https://waterdata.usgs.gov/nd/nwis/inventory/?site_no=06349500&agency_cd=USGS&) on

Ice formation on Des Lacs River at Foxholm, ND (USGS streamgage 05116500;
https://waterdata.usgs.gov/nd/nwis/inventory/?site_no=05116500&agency_cd=USGS&) on

Weir and river are icing over. Start of small ice spikes (estimated height about 1 foot) downstream of weir. Flow is 10.6 cubic feet per second.

Des Lacs River at Foxholm, ND (USGS streamgage 05116500;
https://waterdata.usgs.gov/nd/nwis/inventory/?site_no=05116500&agency_cd=USGS&) on
November 4, 2010. Open-water conditions at weir. Flow was 15.9 cubic feet per second.

Open-water conditions at weir. Flow is 15.9 cubic feet per second.

Open weir on Apple Creek near Menoken, ND (USGS streamgage 06349500;
https://waterdata.usgs.gov/nd/nwis/inventory/?site_no=06349500&agency_cd=USGS&) on
November 2, 2010. Flow was 36.7 cubic feet per second.

Microgravity measurements were collected to determine groundwater-storage changes in the karstic Madison aquifer in the Black Hills of South Dakota during 2009-12. This relative-gravity measurement was made in the Doty focus area to the northwest of Rapid City, SD.

View near a groundwater well in North Dakota.

Control chute, Maple River at Maple River Dam, near Sheldon, ND, streamflow 641 cubic feet per second.

View from a groundwater well site.  Missouri River in the distance, near Huff, North Dakota.

View near a groundwater well site, looking at Missouri River, near Huff, North Dakota.

Collection of direct-current electrical resistivity data to characterize a glacial aquifer near Aberdeen, SD.

Chain of Lakes - Lake Laretta near Lakota, North Dakota, near a former groundwater well site and what used to be a road.

Water flowing over weir on the Souris River near Westhope, North Dakota, streamflow 1,540 cubic feet per second.

Collection of surface-water samples in South Dakota using DH-81.