Kooperativer Bibliotheksverbund

Berlin Brandenburg

and
and

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Type of Medium
Language
Year
  • 1
    Language: English
    In: Geoarchaeology, 2015, Vol.30(4), p.369(10)
    Description: To purchase or authenticate to the full-text of this article, please visit this link: http://onlinelibrary.wiley.com/doi/10.1002/gea.21517/abstract Byline: Sabine Kraushaar, Gregor Ollesch, Christian Siebert, Hans-Joerg Vogel, Markus Fuchs Roman cisterns served as rainwater storage devices for centuries and are densely distributed in parts of northern Jordan. A major earthquake hit the region ca. A.D. 750 and in a short time many settlements were abandoned. As a consequence, most cisterns were not maintained, and they filled with sediments that today provide a postabandonment depositional record. In two field surveys, we mapped the locations of more than 100 cisterns in the Wadi Al-Arab basin and selected two for detailed stratigraphic analysis that included .sub.14C and optically stimulated luminescence dating. Catchment basin area for each cistern was determined by differential GPS. Both cisterns filled with sediments after the great earthquake and consequent abandonment of the region. Calculated sediment volumes are translated to long-term average sediment export rates of 2.6-6.6 t ha.sub.-1a.sub.-1, which are comparable to erosion and sediment yield rates from other studies within the Mediterranean region. Our pilot study suggests that this approach can be applied elsewhere to calculate long-term sediment export rates on hill slopes containing relict cisterns. Article Note: Scientific editing by Andreas Lang CAPTION(S): Supporting materials
    Keywords: Radiometric Dating – Analysis ; Computer Storage Devices – International Trade ; Computer Storage Devices – Analysis ; Rainwater – Analysis ; Sediments (Geology) – Analysis ; Exports – Analysis
    ISSN: 0883-6353
    Source: Cengage Learning, Inc.
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Language: English
    In: Springer Theses
    Description: Intro -- Parts of this research have been published in the following journals: -- Supervisor’s Foreword -- Acknowledgments -- Contents -- Abbreviations -- 1 Introduction -- 1.1 Background and Framework of the Thesis: The Smart—Project -- 1.2 Demand, Preliminary Works and Research Questions of the Thesis...
    Keywords: Geography ; Geomorphology ; Soil Science & Conservation ; Hydrology/Water Resources ; Water Quality/Water Pollution ; Geography
    ISBN: 9783319318868
    ISBN: 3319318861
    E-ISSN: 97833193
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    In: Geoarchaeology, July 2015, Vol.30(4), pp.369-378
    Description: Roman cisterns served as rainwater storage devices for centuries and are densely distributed in parts of northern Jordan. A major earthquake hit the region . A.D. 750 and in a short time many settlements were abandoned. As a consequence, most cisterns were not maintained, and they filled with sediments that today provide a postabandonment depositional record. In two field surveys, we mapped the locations of more than 100 cisterns in the Wadi Al‐Arab basin and selected two for detailed stratigraphic analysis that included C and optically stimulated luminescence dating. Catchment basin area for each cistern was determined by differential GPS. Both cisterns filled with sediments after the great earthquake and consequent abandonment of the region. Calculated sediment volumes are translated to long‐term average sediment export rates of 2.6–6.6 t haa, which are comparable to erosion and sediment yield rates from other studies within the Mediterranean region. Our pilot study suggests that this approach can be applied elsewhere to calculate long‐term sediment export rates on hill slopes containing relict cisterns.
    Keywords: Quaternary Geology ; Sedimentary Petrology ; Arid Environment ; Asia ; Cenozoic ; Chronostratigraphy ; Clay Minerals ; Climate Change ; Climatic Controls ; Dates ; Depositional Environment ; Desertification ; Drainage Basins ; Erodibility ; Erosion ; Erosion Rates ; Holocene ; Human Activity ; Human Ecology ; Hydrology ; Jordan ; Jordan River ; Land Use ; Mediterranean Region ; Middle Ages ; Middle East ; Optically Stimulated Luminescence ; Paleogeography ; Permeability ; Quaternary ; Rainfall ; Reconstruction ; Roman Period ; Sediment Yield ; Sedimentation ; Sheet Silicates ; Silicates ; Soil Erosion ; Stratigraphy ; Terrestrial Environment ; Upper Holocene ; Urban Environment ; Wadi Al-Arab ; Water Resources;
    ISSN: 0883-6353
    E-ISSN: 1520-6548
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Language: English
    In: Journal of Soils and Sediments, 10/2015, Vol.15(10), pp.2155-2173
    Description: Purpose: Water reservoirs around the world suffer from accelerated sediment loads and, consequently, contamination. Notably, in water-scarce regions such as Jordan, this poses a threat to an important water source, and identifying the sediment sources is an important task. Thus, a sediment fingerprinting study in the Wadi Al-Arab catchment of northern Jordan was implemented with special attention directed to the development of suitable correction factors necessary to improve the comparability of source and sink sediments. The selection of seven conservative elements for the sediment fingerprinting was made, with specific attention directed to the chemical environment of the reservoir. Materials and methods: Thirty-six samples from six different surface and subsurface sources and 38 sink samples from the Wadi Al-Arab reservoir were collected. In total, 27 organic and inorganic elements as well as radionuclides were analysed. Two vertical physicochemical water profiles provided information on the pH and Eh conditions and common element concentrations. The stepwise multiple regression analysis model (SMRAM) was developed to explore parameters that influence the element concentrations and their interrelations, and to calculate an element-specific correction factor. The standard selection procedure was expanded by the comparison of water and sink sediment element concentrations, a literature review concerning the pH and Eh conditions and, in selected cases, a correlation analysis. Results and discussion: The combination of Al, Cr, Mn, Fe, super(232)Th, super(228)Th and super(137)Cs provided the best source discrimination, and based on Monte Carlo simulations, the mixing model revealed the existence of three major sediment source areas. These are as follows: (i) olive orchards on slopes, which delivered 59 plus or minus 8 % of the sediments in the sink; (ii) cultivated fields on plateau and saddle positions contributed 11 plus or minus 9 %; and (iii) slopes with natural vegetation used for grazing contributed 29 plus or minus 15 % of the deposited sediment. With a mean residual error of 1.04 %, the sum of the source concentrations differs only slightly from sink concentrations and proves that the model is reliable. Conclusions: The SMRAM model revealed that the different inorganic (total inorganic carbon, TIC) and organic (total organic carbon, TOC) carbon contents and the clay/sand content influence the element concentrations of the sediment samples. Due to the carbonatic environment, it was mainly necessary to correct for TIC. Applying an expanded literature review regarding the chemical environment under investigation, in addition to the standard mass conservation and Kruskal-Wallis test, prevented possible non-conservative elements from entering the discriminant analysis.
    Keywords: Reservoir ; Sediment Sources ; Fingerprinting ; Carbon ; Literature Reviews ; Total Organic Carbon ; Sediments ; Redox Potential ; Modelling ; Carbon ; Vegetation ; Conservation ; Hydrogen Ion Concentration ; Sinks ; Standards ; Slopes ; Reservoirs ; Sediments ; Conferences and Other Meetings ; General;
    ISSN: 1439-0108
    E-ISSN: 1614-7480
    Source: Springer (via CrossRef)
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Language: English
    In: Nuclear Inst. and Methods in Physics Research, B, 01 October 2019, Vol.456, pp.193-202
    Description: The environmental abundance of I has been significantly increased in the Nuclear Age starting from the 1950s. Tons of anthropogenic I have been discharged into the environment through anthropogenic nuclear activities. This fact allows the relative dating of spring water samples, where low concentrations of I indicate waters with no surface contact since the 50s. In this regard, the present study aims to identify the relative age of spring waters in the Kaunertal Valley in Western Austria. More than fifty water samples were derived from precipitation collectors, springs, and directly from the Gepatschferner glacier. Measurement results cover I concentrations ranging from 1 × 10 to 5 × 10 atoms per litre. The variability of six springs, which were tested in July and September, was found to be negligible given the associated measurement uncertainties. No altitudinal dependence was found along the topographic gradient. Significant differences between high I concentrations of precipitation and low I contents of glacier samples were found and are considered beneficial to ascribe spring waters to pre-nuclear (older than 1950) or modern times of formation. Additional tritium analyses of selected water samples partly support the usage of I for relative dating.
    Keywords: Anthropogenic Radionuclide ; Proglacial ; Lateral Moraines ; European Alps ; Kaunertal Valley ; Altitude Gradient ; Dating ; Tritium ; Physics
    ISSN: 0168-583X
    E-ISSN: 1872-9584
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    In: Earth Surface Processes and Landforms, May 2019, Vol.44(6), pp.1259-1273
    Description: Despite the importance of land cover on landscape hydrology and slope stability, the representation of land cover dynamics in physically based models and their associated ecohydrological effects on slope stability is rather scarce. In this study, we assess the impact of different levels of complexity in land cover parameterisation on the explanatory power of a dynamic and process‐based spatial slope stability model. Firstly, we present available and collected data sets and account for the stepwise parameterisation of the model. Secondly, we present approaches to simulate land cover: 1) a grassland landscape without forest coverage; 2) spatially static forest conditions, in which we assume limited knowledge about forest composition; 3) more detailed information of forested areas based on the computation of leaf area development and the implementation of vegetation‐related processes; 4) similar to the third approach but with the additional consideration of the spatial expansion and vertical growth of vegetation. Lastly, the model is calibrated based on meteorological data sets and groundwater measurements. The model results are quantitatively validated for two landslide‐triggering events that occurred in Western Austria. Predictive performances are estimated using the Area Under the receiver operating characteristic Curve (AUC). Our findings indicate that the performance of the slope stability model was strongly determined by model complexity and land cover parameterisation. The implementation of leaf area development and land cover dynamics further yield an acceptable predictive performance (AUC ~0.71‐0.75) and a better conservativeness of the predicted unstable areas (FoC ~0.71). The consideration of dynamic land cover expansion provided better performances than the solely consideration of leaf area development. The results of this study highlight that an increase of effort in the land cover parameterisation of a dynamic slope stability model can increase the explanatory power of the model. © 2018 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd. The implementation of annual leaf area variations, as well as forest expansion and growth enhance the explanatory power and the prediction accuracy of the dynamic, physically based slope stability model STARWARS/PROBSTAB. The multi‐annual simulation of inherent properties and spatial development of land cover yields better predictive performance of the model and more conservative prediction of unstable areas compared with static land cover without inherent variations.
    Keywords: Shallow Translational Landslides ; Land Cover Dynamics ; Parameterisation ; Physically Based Slope Stability Modelling ; Starwars/Probstab ; Predictive Performance
    ISSN: 0197-9337
    E-ISSN: 1096-9837
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
  • 8
  • 9
  • 10
Close ⊗
This website uses cookies and the analysis tool Matomo. Further information can be found on the KOBV privacy pages