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Toward a more complex understanding ...

Greve, Adrienne I.

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Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime./
作者:	Greve, Adrienne I.
面頁冊數:	177 p.
附註:	Adviser: Marina Alberti.
Contained By:	Dissertation Abstracts International68-05A.
標題:	Environmental Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3265343
ISBN:	9780549044673

Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime.
Greve, Adrienne I.

Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime. - 177 p.

Adviser: Marina Alberti.

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

The ability to effectively manage water resources in an urban setting depends on understanding the interaction between freshwater and human systems and our ability to incorporate this understanding into policy, management, and norms of behavior. Past research has clearly identified the differences between undeveloped stream ecosystems and those located in an urbanized watershed by relating stream health to the amount of development. Missing from these findings is an assessment of the factors that contribute to the more subtle differences between urban streams. My research sought to include time in the assessment of urban stream channel morphology and to assess the relationship between urban built form, land cover pattern, and hydrologic flow regime. By evaluating channel morphology on a temporal scale and relating hydrologic flow regime to urban form and land cover pattern, I ask two questions: (1) Does urban stream channel morphology relate to the length of time it has to adjust to urban development? (2) Does hydrologic flow regime relate to urban built form and land cover pattern?

ISBN: 9780549044673Subjects--Topical Terms:

676987
Environmental Sciences.

Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime.
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245 1 0 $a Toward a more complex understanding of urban stream function: Assessing post-development recovery period and channel morphology and the relationship between urban built form, land cover pattern, and hydrologic flow regime.
300 $a 177 p.
500 $a Adviser: Marina Alberti.
500 $a Source: Dissertation Abstracts International, Volume: 68-05, Section: A, page: 2202.
502 $a Thesis (Ph.D.)--University of Washington, 2007.
520 $a The ability to effectively manage water resources in an urban setting depends on understanding the interaction between freshwater and human systems and our ability to incorporate this understanding into policy, management, and norms of behavior. Past research has clearly identified the differences between undeveloped stream ecosystems and those located in an urbanized watershed by relating stream health to the amount of development. Missing from these findings is an assessment of the factors that contribute to the more subtle differences between urban streams. My research sought to include time in the assessment of urban stream channel morphology and to assess the relationship between urban built form, land cover pattern, and hydrologic flow regime. By evaluating channel morphology on a temporal scale and relating hydrologic flow regime to urban form and land cover pattern, I ask two questions: (1) Does urban stream channel morphology relate to the length of time it has to adjust to urban development? (2) Does hydrologic flow regime relate to urban built form and land cover pattern?
520 $a The length of the adjustment period was based on the year when 80 percent of the current built structures where completed. Streams were surveyed for geomorphic channel unit sequence and length, pebble size, bank heights, and channel widths. To answer the second question, urban built form (block size, road density, dwelling unit density, floor area ratio, lot coverage, and parcel size) and land cover pattern (aggregation index, patch density, percent area, and interspersion and juxtaposition index) were assessed for relationship to the flashiness of the urban flow regime.
520 $a The results confirm past findings that imperviousness is the most dominant predictor of channel morphology and flow regime. However in the case of pebble size, bank heights, and the ratio of wetted to bankfull width, the adjustment period length was found to partially counteract the effects of imperviousness. Flashiness of the urban flow regime responded to increased road density, floor area ratio, lot coverage, and dwelling unit density. The interspersion and juxtaposition index for grass and high urban aggregation index were associated with both TQmean and median percent change in mean daily flow.
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791 $a Ph.D.
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