@misc{KoechyKortumLeitneretal.2002,
  author    = {K{\"o}chy, Kristian and Kortum, Gerhard and Leitner, Ulrike and Lubrich, Oliver and Navas Sierra, Jose Alberto and Puig-Samper, Miguel {\´A}ngel and Rebok, Sandra and Schwarz, Ingo},
  title     = {HiN : Alexander von Humboldt im Netz},
  volume    = {III},
  number    = {5},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2568-3543},
  doi       = {10.18443/hinvol3iss052002},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-424305},
  pages     = {133},
  year      = {2002},
  abstract  = {Inhalt: - Kristian K{\"o}chy: Das Ganze der Natur - Alexander von Humboldt und das romantische Forschungsprogramm - Gerhard Kortum: „Alexander von Humboldt" als Name f{\"u}r Forschungsschiffe vor dem Hintergrund seiner meereskundlichen Arbeiten - Ulrike Leitner: „Anciennes folies neptuniennes!" {\"U}ber das wiedergefundene „Journal du Mexique {\`a} Veracruz" aus den mexikanischen Reisetageb{\"u}chern A. v. Humboldts - Oliver Lubrich: „Egipcios por doquier". Alejandro de Humboldt y su visi{\´o}n 'orientalista' de Am{\´e}rica - Jose Alberto Navas Sierra: Humboldt y el '{\´A}rea de Libre Comercio de las Am{\´e}ricas (ALCA)' - Un ejercicio de 'ciencia humboldtiana - Miguel {\´A}ngel Puig-Samper und Sandra Rebok: Un sabio en la meseta. El viaje de Alejandro de Humboldt a Espa{\~n}a en 1799 - Ingo Schwarz: Nachruf - Zur Erinnerung an Kurt-R. Biermann},
  language  = {de}
}
@misc{GomsuJahnKrumpeletal.2004,
  author    = {Gomsu, Joseph and Jahn, Ilse and Krumpel, Heinz and Mazzolini, Renato G. and Puig-Samper, Miguel {\´A}ngel and Rebok, Sandra},
  title     = {HiN : Alexander von Humboldt im Netz},
  series = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  volume    = {V},
  journal   = {HIN : Alexander von Humboldt im Netz ; international review for Humboldtian studies},
  number    = {8},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {2568-3543},
  doi       = {10.18443/hinvol5iss082004},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-35166},
  pages     = {67},
  year      = {2004},
  abstract  = {Inhalt: - Joseph Gomsu: Humboldts Umgang mit lokalem Wissen - Ilse Jahn: „Vater einer großen Nachkommenschaft von Forschungsreisenden ..." - Ehrungen Alexander von Humboldts im Jahre 1869 - Heinz Krumpel: Acerca de la importancia intercultural de Herder - Renato G. Mazzolini: Bildnisse mit Berg: Goethe und Alexander von Humboldt - Miguel {\´A}ngel Puig-Samper und Sandra Rebok: Virtuti et merito. El reconocimiento oficial de Alexander von Humboldt en Espa{\~n}a},
  language  = {de}
}
@misc{JobstHampeMartinezOrtizSoteloetal.2007,
  author    = {Jobst, Anne and Hampe Mart{\´i}nez, Teodoro and Ortiz Sotelo, Jorge and Puig-Samper, Miguel {\´A}ngel and Rebok, Sandra and Rodriguez, Jos{\´e} {\´A}ngel and Thiemer-Sachse, Ursula and Fiedler, Horst},
  title     = {HiN : Alexander von Humboldt im Netz = Humboldt y la Am{\´e}rica ilustrada},
  volume    = {VIII},
  number    = {15},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/hinvol8iss152007},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41647},
  pages     = {79},
  year      = {2007},
  abstract  = {Themenschwerpunkt "Humboldt y la Am{\´e}rica ilustrada" Inhalt: - Anne Jobst: "Briefe wie gemahlt". Alexander von Humboldts Engagement f{\"u}r die Wahl Christian Gottfried Ehrenbergs als Mitglied des Institut de France - Teodoro Hampe Mart{\´i}nez: Introducci{\´o}n al tema de enfoque. "Humboldt y la Am{\´e}rica ilustrada" - Teodoro Hampe Mart{\´i}nez: Humboldt y el mar peruano. Una exploraci{\´o}n de su traves{\´i}a de Lima a Guayaquil (1802/1803) - Jorge Ortiz Sotelo: Aportes de Humboldt. A la n{\´a}utica y a la oceanograf{\´i}a peruana - Miguel {\´A}ngel Puig-Samper ; Sandra Rebok: Alejandro de Humboldt y Espa{\~n}a. La preparaci{\´o}n de su viaje americano y sus v{\´i}nculos con la ciencia espa{\~n}ola - Jos{\´e} {\´A}ngel Rodriguez: Tras las huellas de Humboldt. Realidades y fantas{\´i}a de la naturaleza venezolana en el siglo XIX - Ursula Thiemer-Sachse: Observaciones actuales sobre la imagen de Humboldt en Latinoam{\´e}rica - Horst Fiedler: Ludwig Leichhardt und Alexander von Humboldt},
  language  = {mul}
}
@misc{KnoblochKoelbelSauerweinetal.2008,
  author    = {Knobloch, Eberhard and K{\"o}lbel, Bernd and Sauerwein, Martin and Sauerwein, Katrin and K{\"o}lbel, Steffen and Buckow, Cathleen and Leitner, Ulrike and Schwarz, Ingo and Suckow, Christian and Werner, Petra and Pieper, Herbert},
  title     = {HiN : Alexander von Humboldt im Netz = Herbert Pieper zum 65. Geburtstag},
  volume    = {IX},
  number    = {16},
  editor    = {Ette, Ottmar and Knobloch, Eberhard},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1617-5239},
  doi       = {10.18443/hinvol9iss162008},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42246},
  pages     = {65},
  year      = {2008},
  abstract  = {Herbert Pieper zum 65. Geburtstag Inhalt: - Eberhard Knobloch: Herbert Pieper zum 65. Geburtstag. Ein R{\"u}ckblick - Bernd K{\"o}lbel, Martin Sauerwein, Katrin Sauerwein, Steffen K{\"o}lbel, Cathleen Buckow: Das Fragment des englischen Tagebuches von Alexander von Humboldt - Ulrike Leitner: Humboldt, Cotta, Ritter. Eine Miszelle {\"u}ber die Arbeit an einer Edition - Ingo Schwarz: "da ich mich lebhaft f{\"u}r sein Schiksal im Neuen Continent interessire". A. v. Humboldt als F{\"o}rderer Oscar M. Liebers - Christian Suckow: Humboldts spanische Option 1830. Eine Nachlese - Petra Werner: Bemerkungen zu Alexander von Humboldts Russland-Tagebuch - Herbert Pieper Alexander von Humboldts Wahl in die Akademie der Wissenschaften zu Berlin - Publikationen von Herbert Pieper [Bibliographie]},
  language  = {de}
}
@phdthesis{Francke2009,
  author    = {Francke, Till},
  title     = {Measurement and modelling of water and sediment fluxes in meso-scale dryland catchments},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-31525},
  school      = {Universit{\"a}t Potsdam},
  year      = {2009},
  abstract  = {Water shortage is a serious threat for many societies worldwide. In drylands, water management measures like the construction of reservoirs are affected by eroded sediments transported in the rivers. Thus, the capability of assessing water and sediment fluxes at the river basin scale is of vital importance to support management decisions and policy making. This subject was addressed by the DFG-funded SESAM-project (Sediment Export from large Semi-Arid catchments: Measurements and Modelling). As a part of this project, this thesis focuses on (1) the development and implementation of an erosion module for a meso-scale catchment model, (2) the development of upscaling and generalization methods for the parameterization of such model, (3) the execution of measurements to obtain data required for the modelling and (4) the application of the model to different study areas and its evaluation. The research was carried out in two meso-scale dryland catchments in NE-Spain: Ribera Salada (200 km²) and Is{\´a}bena (450 km²). Adressing objective 1, WASA-SED, a spatially semi-distributed model for water and sediment transport at the meso-scale was developed. The model simulates runoff and erosion processes at the hillslope scale, transport processes of suspended and bedload fluxes in the river reaches, and retention and remobilisation processes of sediments in reservoirs. This thesis introduces the model concept, presents current model applications and discusses its capabilities and limitations. Modelling at larger scales faces the dilemma of describing relevant processes while maintaining a manageable demand for input data and computation time. WASA-SED addresses this challenge by employing an innovative catena-based upscaling approach: the landscape is represented by characteristic toposequences. For deriving these toposequences with regard to multiple attributes (eg. topography, soils, vegetation) the LUMP-algorithm (Landscape Unit Mapping Program) was developed and related to objective 2. It incorporates an algorithm to retrieve representative catenas and their attributes, based on a Digital Elevation Model and supplemental spatial data. These catenas are classified to provide the discretization for the WASA-SED model. For objective 3, water and sediment fluxes were monitored at the catchment outlet of the Is{\´a}bena and some of its sub-catchments. For sediment yield estimation, the intermittent measurements of suspended sediment concentration (SSC) had to be interpolated. This thesis presents a comparison of traditional sediment rating curves (SRCs), generalized linear models (GLMs) and non-parametric regression using Random Forests (RF) and Quantile Regression Forests (QRF). The observed SSCs are highly variable and range over six orders of magnitude. For these data, traditional SRCs performed poorly, as did GLMs, despite including other relevant process variables (e.g. rainfall intensities, discharge characteristics). RF and QRF proved to be very robust and performed favourably for reproducing sediment dynamics. QRF additionally excels in providing estimates on the accuracy of the predictions. Subsequent analysis showed that most of the sediment was exported during intense storms of late summer. Later floods yielded successively less sediment. Comparing sediment generation to yield at the outlet suggested considerable storage effects within the river channel. Addressing objective 4, the WASA-SED model was parameterized for the two study areas in NE Spain and applied with different foci. For Ribera Salada, the uncalibrated model yielded reasonable results for runoff and sediment. It provided quantitative measures of the change in runoff and sediment yield for different land-uses. Additional land management scenarios were presented and compared to impacts caused by climate change projections. In contrast, the application for the Is{\´a}bena focussed on exploring the full potential of the model's predictive capabilities. The calibrated model achieved an acceptable performance for the validation period in terms of water and sediment fluxes. The inadequate representation of the lower sub-catchments inflicted considerable reductions on model performance, while results for the headwater catchments showed good agreement despite stark contrasts in sediment yield. In summary, the application of WASA-SED to three catchments proved the model framework to be a practicable multi-scale approach. It successfully links the hillslope to the catchment scale and integrates the three components hillslope, river and reservoir in one model. Thus, it provides a feasible approach for tackling issues of water and sediment yield at the meso-scale. The crucial role of processes like transmission losses and sediment storage in the river has been identified. Further advances can be expected when the representation of connectivity of water and sediment fluxes (intra-hillslope, hillslope-river, intra-river) is refined and input data improves.},
  language  = {en}
}