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Improving surrogate monitoring techn...

Whiting, Brant R.

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Improving surrogate monitoring techniques for suspended sediment.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Improving surrogate monitoring techniques for suspended sediment./
作者:	Whiting, Brant R.
面頁冊數:	176 p.
附註:	Source: Masters Abstracts International, Volume: 54-03.
Contained By:	Masters Abstracts International54-03(E).
標題:	Environmental engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1584349
ISBN:	9781321576986

Improving surrogate monitoring techniques for suspended sediment.
Whiting, Brant R.

Improving surrogate monitoring techniques for suspended sediment. - 176 p.

Source: Masters Abstracts International, Volume: 54-03.

Thesis (M.S.)--Utah State University, 2014.

In the United States, suspended sediment is cited as the most common impairment to water quality. In addition to suspended sediment being a primary pollutant of concern, many other contaminants and nutrients are associated with suspended sediment particles. Suspended sediment has significant ecological impacts stemming from changes in physical, chemical and biological characteristics of surface waters and the benthic environment. The ability to accurately quantify suspended sediment concentrations and fluxes at appropriate temporal and spatial scales is critical in assessing whether streams are meeting their designated beneficial uses and in implementing and evaluating watershed management and mitigation plans and restoration efforts. Currently, new methods for quantifying suspended sediment concentrations and fluxes use least squares regression between turbidity and TSS (total suspended solids) and have been shown to be site-specific and are affected by several factors, including the size and characteristics of suspended sediment particles; and a single in situ sensor and grab samples of TSS maynot be representative of conditions throughout the entire stream cross section. In this research we used turbidity as a surrogate for TSS at six locations in the Little Bear River, Utah, U.S.A. We also examined the variability in discrete versus width and depth integrated TSS sampling at two sites to develop methods for accounting for these within the surrogate relationships and improve resulting estimates of TSS and fluxes. TSS concentration quantiles were used to assess--in probabilistic terms--the duration and magnitude of potential water quality criteria exceedance. Findings highlight that among some monitoring locations with wide spatial distribution, turbidity-TSS relationships are not site-specific for the more frequent (90th percentile) but lower (<50 NTU) turbidity values. Comparisons of area-weighted point measures of turbidity and width and depth integrated TSS samples revealed that suspended sediment flux is homogenous at their respective stream cross sections for 90% and 99% of the time at sites 2 and 6, respectively. The results are applicable in the determination of attainment or exceedance of a given water quality criterion.

ISBN: 9781321576986Subjects--Topical Terms:

548583
Environmental engineering.

Improving surrogate monitoring techniques for suspended sediment.
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