Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Jeffrey J. Clark"'
Publikováno v:
Advances in Water Resources. 123:120-133
Solute exchange between the pore water of a streambed and overlying flowing surface water can have important effects on the chemical mass balance and biological productivity in the aquatic environment. The base mechanism for driving this hyporheic ex
Autor:
Andrew Knudsen, Jeffrey J. Clark
Publikováno v:
Journal of Environmental Quality. 42:1498-1506
We present high spatial-resolution mapping of soil lead (Pb) concentrations in a small-urban residential setting. X-ray fluorescence was used to measure soil Pb at170 properties in the City Park neighborhood of Appleton, Wisconsin. Greater than two-t
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 369:99-113
Coastal lagoons are valuable natural resources and ecotourism hotspots that are at great risk due to human development and global climate change. In order to protect these resources it is important that we fully understand the paleoenvironmental hist
Publikováno v:
Journal of Hydraulic Engineering. 135:187-197
Variable pressure at the sediment/water interface due to surface water waves can drive advective flows into or out of the lake bed, thereby enhancing solute transfer between lake water and pore water in the lake bed. To quantify this advective transf
Autor:
Jeffrey J. Clark
Publikováno v:
Proceedings of the Wisconsin Space Conference. 1
The goal of this work is to create an interactive, data-rich learning environment that will enhance student understanding of remote sensing principles and surficial processes. In service of this goal a data acquisition system consisting of common con
Publikováno v:
Geoarchaeology. 18:625-648
Potshards discovered during excavation of bridge pilasters for a major expressway over the Rio Indio floodplain, a stream incised within the karsts of north-central Puerto Rico, required large-scale archaeological excavation. Five-meter-deep bridge p
Publikováno v:
Geological Society of America Bulletin. 112:1763-1777
Between 1830 and 1950 much of northeastern Puerto Rico was cleared for agriculture. Runoff increased by 50% and sediment supply to the river channels increased by more than an order of magnitude. Much of the land clearance extended to steep valley sl
Publikováno v:
World Environmental and Water Resources Congress 2013.
Solute exchange between overlying water and the sediment bed of a stream have important effects on the chemical mass balance and biological activities in both the water column and the sediment. Previous studies did not consider the coupled and cumula
Publikováno v:
Water Resources Research. 46
Publikováno v:
Water Resources Research. 45
[1] A model of pore water flow induced by pressure fluctuations from a turbulent boundary layer flow over a permeable sediment bed is presented. The bed has a smooth or rough flat surface without bed forms. Pressure and velocity fluctuations that pen