Click on the following files to download short (10-30 second) video clips of sampling activites for the Albemarle-Pamlico Drainage study of the National Water-Quality Assessment (NAWQA) program. Currently, the video clips are formated only for PC AVI and Mac quicktime and will run only if you have the appropriate plug ins. Although these video clips are short and low resolution, the digital file are still large (800-2000 kb) by Web standards, so please be patient during the download.
If you would like VHS tape copies of the original video, please contact Douglas Harned at 919-571-4024. Tapes of the sampling activities can be provided to you for a fee.
Ground-water and surface-water sampling-- (1.7 mb quicktime) Ground-water sampling from the streambed and instream sampling of to identify the sources of inputs of nutrients into Pete Mitchell Swamp.
Cone Splitter-- (.8 MB quicktime) Device used to split surface-water samples into ten subsamples. Also called the Decapod Splitter, this device is constructed entirely of teflon to minimize sample contanimation.
Measuring Alkalinity-- (378 KB avi) Field measurment of alkalinity by Kelly Smith using a digital tritrometer.
Measuring Alkalinity-- (648 KB quicktime)
Sample Filtering-- (383 KB avi) Kelly Smith filtering surface water sample. Sample filtering for nutrients, major ions, and alkalinity is done inside a plastic bag to isolate the sample from the environment, protecting it from contamination.
Sample Filtering-- (792 KB quicktime)
Bed Sediment Sampling-- (1.3 MB avi) Bed sediment sampling at Swift Creek, N.C. by Janie Williams. Areas with fine sediment deposits are selected, and sampled using a teflon corer, the water is carefully decanted, and the sample is composited. These samples were analyzed for a suite of pesticides and trace elements.
Bed Sediment Sampling-- (1.6 MB quicktime)
Bed Sediment Processing-- (1 MB avi) Janie Williams processing bed sediment from a composited stream sample. A subsample of the stream sample is pushed through a 2 mm stainless-steel sieve using a teflon stirrer. The resultant subsample was chilled and shipped the U.S Geological Survey Central Laboratory in Denver Colorado for organic analysis.
Bed Sediment Processing-- (1.7 MB quicktime)
Macroinvertibrate Sampling-- (1.8 MB avi) Pete Ruhl and Allen Whitehead cut off and collect a submerged stick, on of the primary habitats for macroinvertibrates in small Coastal Plain streams.
Macroinvertibrate Sampling-- (2.4 MB quicktime)
Bug Picking-- (685 KB avi) Pete Ruhl and Allen Whitehead use large seives to search sampled stream material for macroinvertibrates.
Bug Picking-- (970 KB quicktime)
Sampling Splitting-- (2.1 MB quicktime)
Corbicula Sampling-- (1.8 mb avi) The asiatic clam Corbicula was sampled to provide tissue that could be analyzed for pesticides and trace elements.In this video clip Pete Ruhl and Kelly Smith use clam rakes in Swift Creek N.C. to collect the clams.
Borehole Sampler -- (837 KB avi) Tim Spruill, and Jody Eimers pounding in a thin-diameter borehole sampler to obtain a ground-water sample in a corn field.
Borehole Sampler -- (1.4 MB quicktime)
Borehole Sampler 2-- (882 KB avi) Close up view of Tim Spruill pounding in a thin-diameter borehole sampler to obtain a ground-water sample in a corn field.
Borehole Sampler 2-- (1.5 MB quicktime)
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