Only in well-defined small basins with high-quality measurements can the complexities of combined physical, chemical and biological processes be adequately investigated. This volume, an outcome of the Workshop held at Goslar-Hahnenklee, Germany, focuses on: Operational small research basins; Fundamental hydrological research results from small basins; Hydrological processes; and Importance of small basin data and results for modeling. It includes the Braunschweig Declaration on: The need for a global network of long-term small hydrological research basins. The International Association of Hydrological Sciences is the world's premier member-based organization promoting the study and practice of Hydrology. Our books are authored, edited and produced at the highest level of quality, with the most current and thorough research. Our publications and our work advance the science and the professional practice of Hydrology in a variety of Science and Engineering fields around the world. The areas that we publish in include: • Ground water • Surface water • Snow and ice hydrology • Drought and desertification • Runoff modelling • Watershed • Remote sensing • Water quality • Water resources and management • Ecohydrology/hydro-ecology • Erosion and sediment • Tracer hydrology