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In situ characterization of solute t...

Campbell, Christopher George.

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In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology./
作者:	Campbell, Christopher George.
面頁冊數:	199 p.
附註:	Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0128.
Contained By:	Dissertation Abstracts International62-01B.
標題:	Hydrology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3001771
ISBN:	9780493104195

In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology.
Campbell, Christopher George.

In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology. - 199 p.

Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0128.

Thesis (Ph.D.)--University of California, Berkeley, 2001.

Watershed nonpoint source pollution (NPSP) is a major problem faced by land managers throughout the United States. In order to understand the fate of pollution applied in a given watershed it is necessary to define the role played by hillslope soils in transport.

ISBN: 9780493104195Subjects--Topical Terms:

545716
Hydrology.

In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology.
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245 1 0 $a In situ characterization of solute transport processes in woodland soils: Implications for hillslope hydrology.
300 $a 199 p.
500 $a Source: Dissertation Abstracts International, Volume: 62-01, Section: B, page: 0128.
500 $a Chair: Masoud Ghodrati.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2001.
520 $a Watershed nonpoint source pollution (NPSP) is a major problem faced by land managers throughout the United States. In order to understand the fate of pollution applied in a given watershed it is necessary to define the role played by hillslope soils in transport.
520 $a Approaches to this problem may be quantitative, using stochastic models to estimate the probability that a pollutant will reach a point of concern under a given set of conditions, or qualitative, using watershed characteristics (e.g., hillslope form, litter layer, soil characteristics, vegetation, etc.) as indicators of potential NPSP production areas. This thesis was designed to investigate examples from both of these approaches first by systematically characterizing the movement of tracers in heterogeneous level and sloping soils to examine stochastic-convective theories, and secondly, by determining the impact of litter cover and soil characteristics on transport processes. Furthermore, there are few nondestructive methods to examine transport pathways in soils, so it was necessary to examine and employ new in situ measurement techniques. A series of studies were designed and implemented to: (1) develop and test in situ non-destructive methods to characterize water and solute transport in soils in both laboratory and field conditions, (2) characterize the transport processes in a hillslope plot to determine the appropriate measurement and modeling methodologies, (3) use replicated field plots and intact laboratory soil columns to determine the impact of the leaf litter layer on vertical tracer transport, and finally (4) examine how the impact of litter on vertical transport influences lateral subsurface flow using two large scale hillslope plot designs.
520 $a Examinations of the litter influence on solute transport rate and pathways demonstrated that the litter layer funnels solute into preferential flow pathways. However in the absence of the litter, the surface soil appears to function in the same manner. Therefore, in spite of changes in the delivery rate the litter may have no influence on subsurface lateral transport deeper in the soil. As a result, the presence or absence of the litter layer is likely not a good qualitative indicator for watershed areas at risk for producing NPS pollution. (Abstract shortened by UMI.)
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650 4 $a Agriculture, Soil Science. $3 1017824
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791 $a Ph.D.
792 $a 2001
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