Kooperativer Bibliotheksverbund

Language: English

In: Canadian Water Resources Journal, Summer, 2006, Vol.31(2), p.135(4)

Keywords: Streamflow Measurement -- Research ; Hydrological Research -- Methods

ISSN: 0701-1784

Source: Cengage Learning, Inc.

Language: English

In: International Journal of Gynecology and Obstetrics, October 2012, Vol.119, pp.S428-S428

Keywords: Medicine

ISSN: 0020-7292

E-ISSN: 1879-3479

DOI: 10.1016/S0020-7292(12)60901-1

Source: ScienceDirect Journals (Elsevier)

URL: View record in ScienceDirect (Access to full text may be restricted)

Language: English

In: International Journal of Gynecology and Obstetrics, October 2012, Vol.119, pp.S428-S429

Keywords: Medicine

ISSN: 0020-7292

ISSN: International Journal of Gynecology & Obstetrics

E-ISSN: 1879-3479

DOI: 10.1016/S0020-7292(12)60902-3

URL: View record in ScienceDirect (Access to full text may be restricted)

Language: English

In: Journal of Hydrology, 2011, Vol.396(3), pp.277-291

Description: ► Specification of spatially distributed lateral fluxes affects solute transport parameter estimates. ► Information contained on the breakthrough curve alone is insufficient to select the appropriate model structure. ► Implementation of , the lateral ouflow, in OTIS leads to solute mass to groundwater. ► The absence of implementation of in OTIS promotes the storage of solute mass in the transient storage zone. Interactions between mobile stream water and transient storage zones have been the subject of careful attention for decades. However, few studies have considered explicitly the influence of water exchange between the channel and neighbouring hydrological units when modelling transient storage processes, especially the lateral inflow coming from hillslope contributions and outflow to a deep aquifer or to hyporheic flow paths extending beyond the study reach. The objective of this study was to explore the influence of different conceptualizations of these hydrologic exchanges on the estimation of transient storage parameters. Slug injections of sodium chloride (NaCl) were carried out in eight contiguous reaches in the Cotton Creek Experimental Watershed (CCEW), located in south-east British Columbia. Resulting breakthrough curves were subsequently analysed using a Transient Storage Model (TSM) in an inverse modelling framework. We estimated solute transport parameters using three distinct, hypothetical spatial patterns of lateral inflow and outflow, all based on variations of the same five-parameter model structure. We compared optimized parameter values to those resulting from a distinct four-parameter model structure meant to represent the standard application of the TSM, in which only lateral inflow was implemented for net gaining reaches or only lateral outflow for net losing reaches. In the five-parameter model, solute mass was stored predominantly in the transient storage zone and slowly released back to the stream. Conversely, solute mass was predominantly removed from the stream via flow losses in the four-parameter model structure. This led to contrasting estimates of solute transport parameters and subsequent interpretation of solute transport dynamics. Differences in parameter estimates across variations of the five-parameter model structure were small yet statistically significant, except for the transient storage exchange rate coefficient , for which unique determination was problematic. We also based our analysis on , the fraction of median transport time due to transient storage. Differences across configurations in estimates were consistent but small when compared to the variability of among reaches. Optimized parameter values were influenced dominantly by the model structure (four versus five parameters) and then by the conceptualization of spatial arrangement of lateral fluxes along the reach for a set model structure. When boundary conditions are poorly defined, the information contained in the stream tracer breakthrough curve is insufficient to identify a single, unambiguous model structure representing solute transport simulations. Investigating lateral fluxes prior to conducting a study on transient storage processes is necessary, as assuming a certain spatial organization of these fluxes might set ill-defined bases for inter-reach comparisons. Given the difficulty in quantifying the spatial patterns and magnitudes of lateral inputs and outputs, we recommend small-scale laboratory tracer experiments with well-defined and variable boundary conditions as a complement to field studies to provide new insights into stream solute dynamics.

Keywords: Transient Storage ; Flow Loss ; Flow Gain ; Otis ; Uncertainty ; Model Structure ; Geography

ISSN: 0022-1694

E-ISSN: 1879-2707

DOI: 10.1016/j.jhydrol.2010.11.018

URL: View record in ScienceDirect (Access to full text may be restricted)

Language: English

In: The Journal of Minimally Invasive Gynecology, 2011, Vol.18(6), pp.S5-S5

Keywords: Medicine

ISSN: 1553-4650

E-ISSN: 1553-4669

DOI: 10.1016/j.jmig.2011.08.024

Source: ScienceDirect Journals (Elsevier)

URL: View record in ScienceDirect (Access to full text may be restricted)

Language: English

In: The Journal of Minimally Invasive Gynecology, November 2013, Vol.20(6), pp.S55-S56

Keywords: Medicine

ISSN: 1553-4650

E-ISSN: 1553-4669

DOI: 10.1016/j.jmig.2013.08.179

Source: ScienceDirect Journals (Elsevier)

URL: View record in ScienceDirect (Access to full text may be restricted)

Language: English

In: Canadian Water Resources Journal / Revue canadienne des ressources hydriques, 01 January 2012, Vol.37(1), pp.3-21

Description: Uncertainty in hydrometric data is a fact of life. Basic assumptions about the nature of this uncertainty are necessary in every analysis of hydrometric data, and an understanding of the variability of uncertainty can facilitate the effective...

Keywords: Engineering ; Economics

ISSN: 0701-1784

E-ISSN: 1918-1817

DOI: 10.4296/cwrj3701865

URL: View record in Taylor & Francis

Language: English

In: Canadian Water Resources Journal / Revue canadienne des ressources hydriques, 02 January 2014, Vol.39(1), pp.15-31

Description: The relations between groundwater level fluctuations and past climatic variations are explored using available data from the provincial observation well network, climate data and hydrometric data from the two major hydro-climatic zones of British Columbia. The majority of these well records...

Keywords: Engineering ; Economics

ISSN: 0701-1784

E-ISSN: 1918-1817

DOI: 10.1080/07011784.2014.885677

URL: View record in Taylor & Francis

Language: English

In: IEEE Transactions on Computers, May, 2013, Vol.62(5), p.914(14)

Keywords: Multiprocessor Computers -- Design And Construction ; Embedded Systems -- Usage ; Computer Memory -- Usage ; Optimization Theory -- Usage

ISSN: 0018-9340

Source: Cengage Learning, Inc.

Language: English

In: Agricultural and Forest Meteorology, Oct 15, 2012, Vol.164, p.1(9)

Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.agrformet.2012.05.003 Byline: S.M. Guenther (a), R.D. Moore (b)(c), T. Gomi (d) Keywords: Riparian microclimate; Evaporation; Stream temperature; Headwater stream; Forest harvesting Abstract: a* A newly designed evaporimeter was used to measure evaporation from a small stream. a* Forest harvesting modified riparian microclimate and increased stream evaporation. a* A commonly used wind function overestimated stream evaporation. a* Strongly stable conditions, even after logging, limited stream evaporation. Author Affiliation: (a) Hatfield Consultants, Vancouver, B.C., Canada (b) Department of Geography, The University of British Columbia, 1984 West Mall, Vancouver, B.C., Canada V6T 1Z4 (c) Department of Forest Resources Management, The University of British Columbia, Canada (d) Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan Article History: Received 15 February 2012; Revised 1 May 2012; Accepted 5 May 2012

Keywords: Harvesting ; Consulting Services

ISSN: 0168-1923

Source: Cengage Learning, Inc.