Sediment in Small Reservoirs Due to Urbanization

Guy, Harold P.; Ferguson, George E.

doi:10.1061/taceat.0008671

Cited by 4 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When land covered with forest or brush is developed for agricultural or urban use, surface vegetation is removed and original soil or subsoil is exposed to erosion. Sediment yield often increases during the early stages of development and the amount of increase is often related to the amount of land exposed (Guy and Ferguson, 1962).…”

Section: Estimated Sediment Yields For Various Types Of Land Usementioning

confidence: 99%

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Knott¹

1973

Open-File Report

View full text Add to dashboard Cite

This report describes some of the changes in water and sediment discharge that occurred in the Colma Creek basin during a period of major urban expansion. Hydrologic data collected from 1964 to 1971 were used to evaluate trends and relations between sediment yield and land use,, Land use in the basin was estimated from aerial photographs, generally taken annually.The author appreciates the assistance in basic data collection and report preparation provided by George Porterfield and G. 0. Balding. The author is also grateful to V. K. Sanders of the San Mateo County Flood Control District, who provided data from surveys of various debris basins, and L. H. Goss, of the Public Works Department, South San Francisco, for providing historical information on land use changes in the basin. The report received valuable review and criticism from H.

show abstract

Section: Estimated Sediment Yields For Various Types Of Land Usementioning

confidence: 99%

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Knott¹

1973

Open-File Report

View full text Add to dashboard Cite

show abstract

Erosion of the eastern United States observed with ¹⁰Be

Brown

Pavich

Hickman

et al. 1988

Earth Surf Processes Landf

View full text Add to dashboard Cite

The problem of identifying areas of accelerated erosion in a dynamic landscape is complicated. The limited history of sediment yield measurements makes this task difficult even if geomorphic evidence is available. Beryllium-10, a cosmogenic isotope produced by cosmic rays interacting with the earth's atmosphere and surface, has chemical and physical properties that make it useful as a tracer for erosion and sediment transport processes. The rarity of the stable isotope, 9Be, allows "Be to be detected with accelerator mass spectrometry in natural materials at extremely low levels. Backgrounds for rocks and sediments below lo5 atom per g are now attainable, a value to be compared with an average deposition rate of 1.3 x lo6 atom cm-2 yr-l. The affinity of Be for the components of soil and sediment is sufficiently high that it is effectively immobilized on contact, thereby allowing "Be to function as a tracer of sediment transport. TO a good approximation all the "Be transport out of a drainage basin is on the sediment leaving it. The number of "Be atoms passing the gauging station can be determined by measuring the concentration of the isotope in the sediment, if the annual sediment load is known. The ratio of the "Be carried from the basin by the sediment to that incident upon it, called the erosion index, has been determined for 48 drainage basins within the same physiographic province, which allows them to be reasonably compared, all of whieh have sediment yield data. Basins located in the Atlantic coastal plain have an average index of 0.3 with the maximum observed being 0.9. Basins located between the fall line and the mountains, a region called the Piedmont, have an average value of 2.2 with individual values ranging from 0.6 to 6.7; this marked difference is thought to result from two centuries of farming on land of moderate gradient. Basins in the highland regions reflect local conditions with low indices for those in grass and timber and high indices associated with destructive land use. The data allow an estimate of the erosion index for the pre-colonial Piedmont, which then allows the precolonial sediment yield to be calculated. A number of basins have also been examined world wide with similar conclusions derived. An important deviation from the rule is noted for rivers that erode large regions of loess, such as the Mississippi, Hwang Ho, and Yangtze. Large aeolian deposits were laid down during the ice age in these basins, deposits that brought inherited "Be with them and that are easily eroded.. . ,

show abstract

Global acceleration of lake sediment accumulation rates associated with recent human population growth and land-use changes

et al. 2021

View full text Add to dashboard Cite

Sediment in Small Reservoirs Due to Urbanization

Cited by 4 publications

References 0 publications

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Erosion of the eastern United States observed with ¹⁰Be

Global acceleration of lake sediment accumulation rates associated with recent human population growth and land-use changes

Contact Info

Product

Resources

About

Sediment in Small Reservoirs Due to Urbanization

Cited by 4 publications

References 0 publications

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Effects of urbanization on sedimentation and floodflows in Colma Creek basin, California

Erosion of the eastern United States observed with 10Be

Global acceleration of lake sediment accumulation rates associated with recent human population growth and land-use changes

Contact Info

Product

Resources

About

Erosion of the eastern United States observed with ¹⁰Be