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  • 1
    Online Resource
    Online Resource
    Delineation of flood generating processes and their hydrological response
    Wiley ; 2018
    In:  Hydrological Processes Vol. 32, No. 2 ( 2018-01-15), p. 228-240
    Details
    In: Hydrological Processes, Wiley, Vol. 32, No. 2 ( 2018-01-15), p. 228-240
    Abstract: Knowledge about flood generating processes can be beneficial for numerous applications. Especially in the context of climate change impact assessment, daily patterns of meteorological and catchment state conditions leading to flood events (i.e., storylines) may be of value. Here, we propose an approach to identify storylines of flood generation using daily weather and snow cover observations. The approach is tested for and applied to a typical pre‐Alpine catchment in the period between 1961 and 2014. Five precipitation parameters were determined that describe temporal and spatial characteristics of the flood associated precipitation events. The catchment's snow coverage was derived using statistical relationships between a satellite‐derived snow cover climatology and station snow measurements. Moreover, (pre‐) event snow melt sums were estimated using a temperature‐index model. Based on the precipitation and catchment state parameters, 5 storylines were identified with a cluster analysis: These are (a) long duration, low intensity precipitation events with high precipitation depths, (b) long duration precipitation events with high precipitation depths and episodes of high intensities, (c) shorter duration events with high or (d) low precipitation intensity, respectively, and (e) rain‐on‐snow events. The event groups have distinct hydrological characteristics that can largely be explained by the storylines' respective properties. The long duration, high intensity storyline leads to the most adverse hydrological response, namely, a combination of high peak magnitudes, high volumes, and long durations of threshold exceedance. The results show that flood generating processes in mesoscale catchments can be distinguished on the basis of daily meteorological and catchment state parameters and that these process types can explain the hydrological flood properties in a qualitative way. Hydrological simulations of daily resolution can thus be analysed with respect to flood generating processes.
    Type of Medium: Online Resource
    ISSN: 0885-6087 , 1099-1085
    URL: Issue
    URL: Article
    DOI: 10.1002/hyp.v32.2
    DOI: 10.1002/hyp.11407
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 1479953-4
    SSG: 14
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  • 2
    Online Resource
    Online Resource
    Potentials and limitations of modelling spatio-temporal patterns of soil moisture in a high mountain catchment using WaSiM-ETH
    Wiley ; 2010
    In:  Hydrological Processes ( 2010), p. n/a-n/a
    Details
    In: Hydrological Processes, Wiley, ( 2010), p. n/a-n/a
    Type of Medium: Online Resource
    ISSN: 0885-6087 , 1099-1085
    URL: Article
    DOI: 10.1002/hyp.7663
    Language: English
    Publisher: Wiley
    Publication Date: 2010
    detail.hit.zdb_id: 1479953-4
    SSG: 14
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  • 3
    Online Resource
    Online Resource
    Spatial patterns of frequent floods in Switzerland
    Informa UK Limited ; 2018
    In:  Hydrological Sciences Journal Vol. 63, No. 6 ( 2018-04-26), p. 895-908
    Details
    In: Hydrological Sciences Journal, Informa UK Limited, Vol. 63, No. 6 ( 2018-04-26), p. 895-908
    Type of Medium: Online Resource
    ISSN: 0262-6667 , 2150-3435
    URL: Article
    DOI: 10.1080/02626667.2018.1450505
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2018
    detail.hit.zdb_id: 2180448-5
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Monthly streamflow forecasting at varying spatial scales in the Rhine basin
    Copernicus GmbH ; 2018
    In:  Hydrology and Earth System Sciences Vol. 22, No. 2 ( 2018-02-02), p. 929-942
    Details
    In: Hydrology and Earth System Sciences, Copernicus GmbH, Vol. 22, No. 2 ( 2018-02-02), p. 929-942
    Abstract: Abstract. Model output statistics (MOS) methods can be used to empirically relate an environmental variable of interest to predictions from earth system models (ESMs). This variable often belongs to a spatial scale not resolved by the ESM. Here, using the linear model fitted by least squares, we regress monthly mean streamflow of the Rhine River at Lobith and Basel against seasonal predictions of precipitation, surface air temperature, and runoff from the European Centre for Medium-Range Weather Forecasts. To address potential effects of a scale mismatch between the ESM's horizontal grid resolution and the hydrological application, the MOS method is further tested with an experiment conducted at the subcatchment scale. This experiment applies the MOS method to 133 additional gauging stations located within the Rhine basin and combines the forecasts from the subcatchments to predict streamflow at Lobith and Basel. In doing so, the MOS method is tested for catchments areas covering 4 orders of magnitude. Using data from the period 1981–2011, the results show that skill, with respect to climatology, is restricted on average to the first month ahead. This result holds for both the predictor combination that mimics the initial conditions and the predictor combinations that additionally include the dynamical seasonal predictions. The latter, however, reduce the mean absolute error of the former in the range of 5 to 12 %, which is consistently reproduced at the subcatchment scale. An additional experiment conducted for 5-day mean streamflow indicates that the dynamical predictions help to reduce uncertainties up to about 20 days ahead, but it also reveals some shortcomings of the present MOS method.
    Type of Medium: Online Resource
    ISSN: 1607-7938
    URL: Article
    URL: Article
    DOI: 10.5194/hess-22-929-2018
    DOI: 10.5194/hess-22-929-2018-supplement
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2100610-6
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  • 5
    Online Resource
    Online Resource
    River runoff in Switzerland in a changing climate – changes in moderate extremes and their seasonality
    Copernicus GmbH ; 2021
    In:  Hydrology and Earth System Sciences Vol. 25, No. 6 ( 2021-06-23), p. 3577-3594
    Details
    In: Hydrology and Earth System Sciences, Copernicus GmbH, Vol. 25, No. 6 ( 2021-06-23), p. 3577-3594
    Abstract: Abstract. Future changes in river runoff will impact many sectors such as agriculture, energy production, or ecosystems. Here, we study changes in the seasonality, frequency, and magnitude of moderate low and high flows and their time of emergence. The time of emergence indicates the timing of significant changes in the flow magnitudes. Daily runoff is simulated for 93 Swiss catchments for the period 1981–2099 under Representative Concentration Pathway 8.5 with 20 climate model chains from the most recent transient Swiss Climate Change Scenarios. In the present climate, annual low flows typically occur in the summer half-year in lower-lying catchments (〈1500 m a.s.l.) and in the winter half-year in Alpine catchments (〉1500 m a.s.l.). By the end of the 21st century, annual low flows are projected to occur in late summer and early autumn in most catchments. This indicates that decreasing precipitation and increasing evapotranspiration in summer and autumn exceed the water contributions from other processes such as snowmelt and glacier melt. In lower-lying catchments, the frequency of annual low flows increases, but their magnitude decreases and becomes more severe. In Alpine catchments, annual low flows occur less often and their magnitude increases. The magnitude of seasonal low flows is projected to decrease in the summer half-year in most catchments and to increase in the winter half-year in Alpine catchments. Early time of emergence is found for annual low flows in Alpine catchments in the 21st century due to early changes in low flows in the winter half-year. In lower-lying catchments, significant changes in low flows emerge later in the century. Annual high flows occur today in lower-lying catchments in the winter half-year and in Alpine catchments in the summer half-year. Climate change will change this seasonality mainly in Alpine catchments with a shift towards earlier seasonality in summer due to the reduced contribution of snowmelt and glacier melt in summer. Annual high flows tend to occur more frequent, and their magnitude increases in most catchments except some Alpine catchments. The magnitude of seasonal high flows in most catchments is projected to increase in the winter half-year and to decrease in the summer half-year. However, the climate model agreement on the sign of change in moderate high flows is weak.
    Type of Medium: Online Resource
    ISSN: 1607-7938
    URL: Article
    URL: Article
    DOI: 10.5194/hess-25-3577-2021
    DOI: 10.5194/hess-25-3577-2021-supplement
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2021
    detail.hit.zdb_id: 2100610-6
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  • 6
    Online Resource
    Online Resource
    Comparison of cross-validation and bootstrap aggregating for building a seasonal streamflow forecast model
    Copernicus GmbH ; 2016
    In:  Proceedings of the International Association of Hydrological Sciences Vol. 374 ( 2016-10-17), p. 159-163
    Details
    In: Proceedings of the International Association of Hydrological Sciences, Copernicus GmbH, Vol. 374 ( 2016-10-17), p. 159-163
    Abstract: Abstract. Based on a hindcast experiment for the period 1982–2013 in 66 sub-catchments of the Swiss Rhine, the present study compares two approaches of building a regression model for seasonal streamflow forecasting. The first approach selects a single "best guess" model, which is tested by leave-one-out cross-validation. The second approach implements the idea of bootstrap aggregating, where bootstrap replicates are employed to select several models, and out-of-bag predictions provide model testing. The target value is mean streamflow for durations of 30, 60 and 90 days, starting with the 1st and 16th day of every month. Compared to the best guess model, bootstrap aggregating reduces the mean squared error of the streamflow forecast by seven percent on average. Thus, if resampling is anyway part of the model building procedure, bootstrap aggregating seems to be a useful strategy in statistical seasonal streamflow forecasting. Since the improved accuracy comes at the cost of a less interpretable model, the approach might be best suited for pure prediction tasks, e.g. as in operational applications.
    Type of Medium: Online Resource
    ISSN: 2199-899X
    URL: Article
    DOI: 10.5194/piahs-374-159-2016
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2827925-6
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  • 7
    Online Resource
    Online Resource
    The effect of the Tambora eruption on Swiss flood generation in 1816/1817
    Elsevier BV ; 2018
    In:  Science of The Total Environment Vol. 627 ( 2018-06), p. 1218-1227
    Details
    In: Science of The Total Environment, Elsevier BV, Vol. 627 ( 2018-06), p. 1218-1227
    Type of Medium: Online Resource
    ISSN: 0048-9697
    URL: Article
    DOI: 10.1016/j.scitotenv.2018.01.254
    RVK:
    AR 10100
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2018
    detail.hit.zdb_id: 1498726-0
    detail.hit.zdb_id: 121506-1
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Differences between recent and historical records of upper species limits in the northern European Alps
    Erdkunde ; 2013
    In:  Erdkunde Vol. 67, No. 4 ( 2013-12-31), p. 345-354
    Details
    In: Erdkunde, Erdkunde, Vol. 67, No. 4 ( 2013-12-31), p. 345-354
    Type of Medium: Online Resource
    ISSN: 0014-0015
    URL: Article
    DOI: 10.3112/erdkunde.2013.04.04
    RVK:
    RA 2050
    Language: Unknown
    Publisher: Erdkunde
    Publication Date: 2013
    detail.hit.zdb_id: 2409219-8
    detail.hit.zdb_id: 1906-9
    SSG: 12
    SSG: 14
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  • 9
    Online Resource
    Online Resource
    The alpine treeline under changing land use and changing climate: Approach and preliminary results from continental Norway
    Informa UK Limited ; 2004
    In:  Norsk Geografisk Tidsskrift - Norwegian Journal of Geography Vol. 58, No. 4 ( 2004-12), p. 183-193
    Details
    In: Norsk Geografisk Tidsskrift - Norwegian Journal of Geography, Informa UK Limited, Vol. 58, No. 4 ( 2004-12), p. 183-193
    Type of Medium: Online Resource
    ISSN: 0029-1951 , 1502-5292
    URL: Article
    DOI: 10.1080/00291950410002421
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2004
    detail.hit.zdb_id: 2028661-2
    SSG: 14
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  • 10
    Online Resource
    Online Resource
    Quantitative cross-validation and content analysis of the 450k DNA methylation array from Illumina, Inc.
    Springer Science and Business Media LLC ; 2012
    In:  BMC Research Notes Vol. 5, No. 1 ( 2012-12)
    Details
    In: BMC Research Notes, Springer Science and Business Media LLC, Vol. 5, No. 1 ( 2012-12)
    Abstract: The newly released 450k DNA methylation array from Illumina, Inc. offers the possibility to analyze more than 480,000 individual CpG sites in a user friendly standardized format. In this study the relationship between the β-values provided by the Illumina, Inc. array for each individual CpG dinucleotide and the quantitative methylation levels obtained by pyrosequencing were analyzed. In addition, the representation of microRNA genes and imprinted loci on the Illumina, Inc. array was assessed in detail. Genomic DNA from 4 human breast cancer cell lines (IPH-926, HCC1937, MDA-MB-134, PMC42) and 18 human breast cancer specimens as well as 4 normal mammary epithelial fractions was analyzed on 450k DNA methylation arrays. The β-values for 692 individual CpG sites from 62 different genes were cross-validated using conventional quantitative pyrosequencing. Findings The newly released 450k methylation array from Illumina, Inc. shows a high concordance with quantitative pyrosequencing if identical CpG sites are analyzed in cell lines (Spearman r = 0.88, p ≪ 0.0001), which is somewhat reduced in primary tumor specimens (Spearman r = 0.86, p ≪ 0.0001). 80.7% of the CpG sites show an absolute difference in methylation level of less than 15 percentage points. If different CpG sites in the same CpG islands are targeted the concordance is lower (r = 0.83 in cell lines and r = 0.7 in primary tumors). The number of CpG sites representing microRNA genes and imprinted loci is very heterogeneous (range: 1 – 70 CpG sites for microRNAs and 1 – 288 for imprinted loci). Conclusions The newly released 450k methylation array from Illumina, Inc. provides a genome-wide quantitative representation of DNA methylation aberrations in a convenient format. Overall, the congruence with pyrosequencing data is very good. However, for individual loci one should be careful to translate the β-values directly into percent methylation levels.
    Type of Medium: Online Resource
    ISSN: 1756-0500
    URL: Article
    DOI: 10.1186/1756-0500-5-210
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2012
    detail.hit.zdb_id: 2413336-X
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