@article{BronstertGuentner2000,
  author    = {Bronstert, Axel and G{\"u}ntner, Andreas},
  title     = {A large-scale hydrological model for the semi-arid environment of north-eastern Brazil},
  year      = {2000},
  language  = {en}
}
@article{BronstertKrolJaegeretal.2000,
  author    = {Bronstert, Axel and Krol, Marten S. and Jaeger, Annekathrin and G{\"u}ntner, Andreas and Hauschild, M. and D{\"o}ll, P.},
  title     = {Integrated modelling of water availability an management in the semi-arid Notheast of Brazil},
  year      = {2000},
  language  = {en}
}
@article{GuentnerBronstert2001,
  author    = {G{\"u}ntner, Andreas and Bronstert, Axel},
  title     = {Modelling the effects of climate change on water availability in the semi-arid of North-East Brazil},
  year      = {2001},
  language  = {en}
}
@article{GuentnerOlssonCalveretal.2001,
  author    = {G{\"u}ntner, Andreas and Olsson, J. and Calver, Ann and Gannon, B.},
  title     = {Cascade-based disaggregation of continuous rainfall time series : the influence of climate},
  year      = {2001},
  language  = {en}
}
@article{GuentnerBronstert2001,
  author    = {G{\"u}ntner, Andreas and Bronstert, Axel},
  title     = {WAVES - Water availability, vulnerability of ecosystems and society in the northeast of Brazil : sub-project large-scale hydrological modelling},
  year      = {2001},
  language  = {en}
}
@article{BronstertKrolJaegeretal.2002,
  author    = {Bronstert, Axel and Krol, Marten S. and Jaeger, Annekathrin and G{\"u}ntner, Andreas},
  title     = {Integrated modelling of climate, water, soil, agricultural and socio-economic processes : a general introduction to the methodology and some exemplary results from the semi-arid Northeast of Brazil},
  year      = {2002},
  language  = {en}
}
@article{GuentnerBronstert2002,
  author    = {G{\"u}ntner, Andreas and Bronstert, Axel},
  title     = {Process-based modelling of large-scale water availability in a semi-arid environment : process representation and scaling issues},
  year      = {2002},
  language  = {en}
}
@article{GuentnerBronstert2004,
  author    = {G{\"u}ntner, Andreas and Bronstert, Axel},
  title     = {Representation of landscape variability and lateral redistribution processes for large-scale hydrological modelling in semi-arid areas},
  issn      = {0022-1694},
  year      = {2004},
  abstract  = {The spatial variability of landscape features such as topography, soils and vegetation defines the spatial pattern of hydrological state variables like soil moisture. Spatial variability thereby controls the functional behaviour of the landscape in terms of its runoff response. A consequence of spatial variability is that exchange processes between landscape patches can occur at various spatial scales ranging from the plot to the basin scale. In semi-arid areas, the lateral redistribution of surface runoff between adjacent landscape patches is an important process. For applications to large river basins of 10(4)-10(5) km(2) in size, a multi-scale landscape discretization scheme is presented in this paper. The landscape is sub-divided into modelling units within a hierarchy of spatial scale levels. By delineating areas characterized by a typical toposequence, organised and random variability of landscape characteristics is captured in the model. Using runoff-runon relationships with transition frequencies based on areal fractions of modelling units, lateral surface and subsurface water fluxes between modelling units at the hillslope scale are represented. Thus, the new approach allows for a manageable description of interactions between fine-scale landscape features for inclusion in coarse-scale models. Model applications for the State of Ceara (148,000 km(2)) in the north- east of Brazil demonstrate the importance of taking into account landscape variability and interactions between landscape patches in a semi-arid environment. Using mean landscape characteristics leads to a considerable underestimation of infiltration-excess surface runoff and total simulated runoff. Re-infiltration of surface runoff and lateral redistribution processes between landscape patches cause a reduction of runoff volumes at the basin scale and contribute to the amplification of variations in runoff volumes relative to variations in rainfall volumes for semi-arid areas. (C) 2004 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{GuentnerKroldeArajoetal.2004,
  author    = {G{\"u}ntner, Andreas and Krol, Marten S. and de Arajo, Jos{\´e} Carlos and Bronstert, Axel},
  title     = {Simple water balance modelling of surface reservoir systems in a large data-scarce semiarid region},
  issn      = {0262-6667},
  year      = {2004},
  abstract  = {Water resources in dryland areas are often provided by numerous surface reservoirs. As a basis for securing future water supply, the dynamics of reservoir systems need to be simulated for large river basins, accounting for environmental change and an increasing water demand. For the State of Ceara in semiarid Northeast Brazil, with several thousands of reservoirs, a simple deterministic water balance model is presented. Within a cascade-type approach, the reservoirs are grouped into six classes according to storage capacity, rules for flow routing between reservoirs of different size are defined, and water withdrawal and return flow due to human water use is accounted for. While large uncertainties in model applications exist, particularly in terms of reservoir operation rules, model validation against observed reservoir storage volumes shows that the approach is a reasonable simplification to assess surface water availability in large river basins. The results demonstrate the large impact of reservoir storage on downstream flow and stress the need for a coupled simulation of runoff generation, network redistribution and water use},
  language  = {en}
}
@article{KrolJaegerBronstertetal.2006,
  author    = {Krol, Maarten and Jaeger, Annekathrin and Bronstert, Axel and G{\"u}ntner, Andreas},
  title     = {Integrated modelling of climate, water, soil, agricultural and socio-economic processes: A general introduction of the methodology and some exemplary results from the semi-arid north-east of Brazil},
  series = {Journal of hydrology},
  volume    = {328},
  journal   = {Journal of hydrology},
  number    = {3-4},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0022-1694},
  doi       = {10.1016/j.jhydrol.2005.12.021},
  pages     = {417 -- 431},
  year      = {2006},
  abstract  = {Many semi-arid regions are characterised by water scarcity and vulnerability of natural resources, pronounced climatic variability and social stress. Integrated studies including climatotogy, hydrology, and socio-econornic studies are required both for analysing the dynamic natural conditions and to assess possible strategies to make semi-arid regions Less vulnerable to the present and changing climate. The model introduced here dynamically describes the retationships between climate forcing, water availability, agriculture and selected societal processes. The model has been tailored to simulate the rather complex situation in the semi-and north-eastern Brazil in a quantitative manner including the sensitivity to external forcing, such as climate change. The selected results presented show the general functioning of the integrated model, with a primary focus on climate change impacts. It becomes evident that due to Large differences in regional climate scenarios, it is still impossible to give quantitative values for the most probable development, e.g., to assign probabilities to the simulated results. However, it becomes clear that water is a very crucial factor, and that an efficient and ecologically sound water management is a key question for the further development of that semi-arid region. The simulation results show that, independent of the differences in climate change scenarios, rain-fed farming is more vulnerable to drought impacts compared to irrigated farming. However, the capacity of irrigation and other water infrastructure systems to enhance resilience in respect to climatic fluctuations is significantly constrained given a significant negative precipitation trend. (c) 2005 Elsevier B.V. All rights reserved.},
  language  = {en}
}