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A hierarchical watershed assessment ...

Morgan, Robert Allen.

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A hierarchical watershed assessment and resource prioritization protocol for stream pollution control and restoration.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A hierarchical watershed assessment and resource prioritization protocol for stream pollution control and restoration./
作者:	Morgan, Robert Allen.
面頁冊數:	306 p.
附註:	Source: Dissertation Abstracts International, Volume: 68-04, Section: B, page: 2476.
Contained By:	Dissertation Abstracts International68-04B.
標題:	Hydrology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3257889

A hierarchical watershed assessment and resource prioritization protocol for stream pollution control and restoration.
Morgan, Robert Allen.

A hierarchical watershed assessment and resource prioritization protocol for stream pollution control and restoration. - 306 p.

Source: Dissertation Abstracts International, Volume: 68-04, Section: B, page: 2476.

Thesis (Ph.D.)--University of Arkansas, 2007.

State and local nonpoint source pollution management programs have come under increasing pressure to demonstrate water quality improvements. An effective protocol was developed to prioritize efforts toward critical watersheds in Arkansas. A multi-level process was developed to prioritize 8-digit HUC watersheds at the state level, 10 and 12-digit sub-watersheds, and targeted individual stream reaches within the 12-digit HUCs. Statewide watershed prioritization was accomplished through a collaborative learning exercise with Arkansas' Nonpoint Source Task Force. Comparative risk analysis was used in the exercise to rank watersheds according to criteria established by deliberation of the Task Force. Analysis of a survey of participants in the Task Force confirmed that the collaborative learning process effectively generated consensus within the Task Force as well as between scientists, program administrations, and laypersons. To prioritize watersheds at the 10 and 12-digit HUC level, the Spatially Referenced Regressions on Watershed Attributes (SPARROW) model was used to estimate yields of total phosphorus from sub-watersheds (8, 10 or 11, and 12-digit hydrologic unit code watersheds) within the East and Central Farming and Forest Land Resource Region. Four significant variables were identified as sources of total phosphorus in the study area (point sources, animal waste application, forestland and drainage density). These variables were coupled with land use coefficients for urban land, cultivated land, stream decay and reservoir decay generated by the USGS's national SPARROW model for sources of total phosphorus. The model R2 for predicted flux at 37 long term monitoring sites was 0.68. The SPARROW model was applied to the Beaver Lake watershed in Northwest Arkansas to identify priority sources of total phosphorus to the lake. The SPARROW model was then compared to results from a simple spreadsheet model (STEPL) and a mechanistic watershed model (SWAT). A dichotomous process was then developed to identify stream reaches in the Ozark Highlands impaired by nutrients. This process compared easily obtained data to water quality standards, nuisance conditions and downstream impacts to select reaches for additional study. Application of this protocol would improve the effectiveness of nonpoint source management programs by developing a higher level of confidence among stakeholder groups.Subjects--Topical Terms:

545716
Hydrology.

A hierarchical watershed assessment and resource prioritization protocol for stream pollution control and restoration.
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