We investigated the influence of hillslope scale topographic characteristics and the relative position of hillslopes along streams (i.e., internal catchment structure) on the isotopic composition of base flow in first-order, forested headwater streams at Coweeta Hydrologic Laboratory. The study focused on two adjacent forested catchments with different topographic characteristics. We used stabl...

Understanding links between catchment management and community health demands consideration of complex bio-physical, socio-economic, and public health relationships. These relationships cut across a spectrum of health, environment and development considerations and highlight the need for appropriate and integrative modes of inquiry and decision making. What can Participatory Action Research (PA...

this paper seeks to emphasize the flow variability in the calnistea catchment by analyzing the local physiographic factors. the research has shown that the amount of precipitation that falls to the ground is low, the rocks in the region are soft, but highly permeable, gradients are gentle in most of the territory and vegetal cover is sparse and therefore cannot hold important amounts of water. ...

groundwater is among the most important resources of drinking water supply ofthe worldwide population. use of recharge area is one of the methods for artificiallyrecharging groundwater. selection of suitable sites for artificial recharge is very importantand must be carried out accurately. there are different types of land use, only rangelandsare appropriate for artificial recharge because of t...

In low nutrient alpine lakes, the littoral zone is the most productive part of the ecosystem, and it is a biodiversity hotspot. It is not entirely clear how the scale and physical heterogeneity of surrounding catchment, its ecological composition, and larger landscape gradients work together to sustain littoral communities. A total of 113 alpine lakes from the central Pyrenees were surveyed to ...

Migration monitoring stations (MMSs) were established to provide information on population trends of North American passerines. However, apart from inferring general origins of birds, there has been no way to delineate geographical catchment areas sampled by MMSs. The ability to resolve MMS catchment areas would greatly enhance our ability to link and constrain population declines to specific g...

Guangtao Fu (corresponding author) David Butler Centre for Water Systems, School of Engineering, Computing and Mathematics, University of Exeter, North Park Road, Harrison Building, Exeter EX4 4QF, UK Tel.:+44 1392 264075; Fax:+44 1392 217965; E-mail: g.fu@exeter.ac.uk Christos Makropoulos Department of Water Resources and Environmental Engineering, School of Civil Engineering, National Technic...

Soil is a critical intermediary of water flux between precipitation and stream flow. Characterization of soil water content ( , m3 m 3) may be especially difficult in mountainous, snow-dominated catchments due to highly variable water inputs, topography, soils and vegetation. However, individual sites exhibit similar seasonal dynamics, suggesting that it may be possible to describe spatial vari...

Catchment models are by definition simplified representations of the real world system. This aggregation takes place in space and time and has several important consequences. First, there are no generally applicable rules to perform this aggregation, and the resulting model structure is usually a function of the modeller’s hydrological understanding. Secondly, the model parameters cannot be mea...

THE EPIDEMIOLOGIC CATCHMENT AREA (ECA) Program is a developmental series of epidemiologic research studies performed by independent research teams in collaboration with the Center for Epidemiologic Studies (CES) of the Division of Biometry and Epidemiology, National Institute of Mental Health (NIMH). The broad aims of the Program are the historical goals of psychiatric epidemiology, to estimate...