1. Our objective was to investigate the associations between benthic macroinvertebrate communities and environmental factors described at three spatial scales: local, reach and catchment. Differences in these associations, because of local topography, were determined by categorising sites into those having a large or small ‘reach contributing area’ (RCA), which is the lateral area of land contr...

The main objective of the study presented in this paper was to develop an evaluation scheme which is suitable for spatially explicit groundwater vulnerability assessment according to the Water Framework Directive (WFD). Study area was the Hase river catchment, an area of about 3 000 km2 in north-west Germany which is dominated by livestock farming, in particular pig and poultry production. For ...

The hydrodynamics of collisions and mergers of main-sequence stars is discussed in the light of recent 3-D calculations using the smoothed particle hydrodynamics (SPH) method. Theoretical models for the formation of blue stragglers are reviewed in the context of recent comparisons between the observed properties of blue stragglers in dense globular clusters and the predictions of those models.

1 Co-operative Research Centre for Catchment Hydrology and the Department of Civil and Environmental Engineering, University of Melbourne ([email protected], [email protected], [email protected]). 2 Co-operative Research Centre for Catchment Hydrology and the School of Anthropology, Geography and Environmental Studies, University of Melbourne (idruth@unimel...

Time series of chloride concentrations and oxygen-18 isotopic ratios are widely used for tracing catchment storage and mixing processes and for inferring catchment travel-time distributions. However, neither chloride nor oxygen-18 is an ideal hydrologic tracer: chloride concentrations in streamwater can be affected by dry deposition, evapoconcentration and biogeochemical cycling, and water isot...

The hydrologic connectivity between hillslopes and streams impacts the geomorphological evolution of catchments. Here, we propose a conceptual model for hydrogeomorphological evolution of the Susquehanna Shale Hills Critical Zone Observatory (SSHCZO), a first-order catchment developed on shale in central Pennsylvania, U.S.A. At SSHCZO, the majority of available water (the difference between inc...

The goods and services that lakes provide result from complex interactions between meteorology, hydrology, nutrient loads and in-lake processes. Hydrology and nutrient loads are, in turn, influenced by socio-economic factors such as human habitation, water abstraction and land-management, within their catchments. Models provide a means of linking these different domains and also of forecasting ...

Panoramic views of natural environments provide visually navigating animals with two kinds of information: they define locations because image differences increase smoothly with distance from a reference location and they provide compass information, because image differences increase smoothly with rotation away from a reference orientation. The range over which a given reference image can prov...

The hydrodynamics of collisions and mergers of main-sequence stars is discussed in the light of recent 3-D calculations using the smoothed particle hydrodynamics (SPH) method. Theoretical models for the formation of blue stragglers are reviewed in the context of recent comparisons between the observed properties of blue stragglers in dense globular clusters and the predictions of those models.

#National Centre for Macromolecular Hydrodynamics, Department of Biochemistry, Leicester University, University Road, Leicester, LEI1 7RH, UK. +MRC Cellular Immunology Unit, Sir William Dunn School of pathology, University of Oxford, Oxford, OX I 3RE, UK. National Centre for Macromolecular Hydrodynamics, Department of Applied Biochemistry and Food Science, Nottingham University, Sutton Boningto...