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Assessing the hydroecological effect...

University of California, Davis.

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Assessing the hydroecological effects of stream restoration.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Assessing the hydroecological effects of stream restoration./
作者:	Hammersmark, Christopher Trevor.
面頁冊數:	137 p.
附註:	Source: Dissertation Abstracts International, Volume: 69-06, Section: B, page: 3475.
Contained By:	Dissertation Abstracts International69-06B.
標題:	Agriculture, Range Management. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3317929
ISBN:	9780549671565

Assessing the hydroecological effects of stream restoration.
Hammersmark, Christopher Trevor.

Assessing the hydroecological effects of stream restoration. - 137 p.

Source: Dissertation Abstracts International, Volume: 69-06, Section: B, page: 3475.

Thesis (Ph.D.)--University of California, Davis, 2008.

This dissertation consists of three studies undertaken to document and quantify the hydroecological effects of stream restoration. The study was conducted at the Bear Creek Meadow, a well-documented "pond and plug" type stream restoration project, located in northeastern California. The first study investigates the effects of stream restoration on hydrologic processes. A hydrologic model of the meadow was developed, calibrated, validated, and used to simulate the system under pre- and post-restoration topographic conditions. Simulation results document three general hydrologic responses to the meadow restoration effort: (1) increased groundwater levels and volume of subsurface storage; (2) increased frequency and duration of floodplain inundation and decreased magnitude of flood peaks; and (3) decreased annual runoff and duration of baseflow. The second study explores the relationship between temporally varying water-table elevations and plant community distributions in the restored riparian meadow. Vegetation was sampled throughout the meadow and classified into four community types. The hydrologic model was used to simulate a three-year time series of water-table depth for each plot, and nonmetric multidimensional scaling was utilized to investigate the relationships between community types and hydrologic variables. Community types were distributed along the hydrologic gradient at reasonably similar positions to those found in previous studies, however the range of water-table depths in this meadow was greater than previously observed, presumably due to the higher temporal resolution of water-table measurements, in addition to the intermittent nature of stream flow in Bear Creek and its substantial control of water-table elevations. In the final study, the changes in distribution of several commonly occurring herbaceous plant species were investigated. Vegetation models were developed where the probability of occurrence of a particular species was predicted as a function of growing season water table depth and range. These vegetation models were used in concert with the hydrologic model in order to predict the spatial distribution of individual plant species for pre- and post-restoration topographic-hydrologic conditions. Simulation results indicate an increase in the spatial distribution of obligate wetland, and facultative wetland plant species, as well as a decrease in the distribution of facultative upland and obligate upland plant species.

ISBN: 9780549671565Subjects--Topical Terms:

1022885
Agriculture, Range Management.

Assessing the hydroecological effects of stream restoration.
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