The circulation of the Persian Gulf: a numerical study J. Kämpf and M. Sadrinasab School of Chemistry, Physics and Earth Sciences, Flinders Research Centre for Coast and Catchment Environments, Flinders University, Adelaide, Australia Khorramshahr University of Nautical Sciences & Technology, Khorramshahr, Iran Received: 4 March 2005 – Accepted: 11 April 2005 – Published: 12 May 2005 Correspond...

[1] In this study we investigate an event-scale transit time distribution (TTD) for a catchment located in the Santa Catalina Mountains northeast of downtown Tucson, Arizona, USA, during a series of extreme rainfall events. Traditionally, TTD studies look at the long time response of a catchment to an input variation in tracer concentration. Few studies have determined the TTD at the scale of a...

In the past few decades, the quantitative computation of surface roughness has received increasing attention due to its importance in numerical surface study. In this paper, concepts of mathematical morphology are employed to compute and characterize the surface roughness of catchments extracted from a simulated digital elevation model (DEM). Morphological smoothing is implemented on the simula...

OBJECTIVE To illustrate the use of a new method for defining the catchment areas of health-care facilities based on their utilization. METHODS The catchment areas of six health-care facilities in Uganda were determined using the cumulative case ratio: the ratio of the observed to expected utilization of a facility for a particular condition by patients from small administrative areas. The cum...

The drainage network must take the farming systems and the landscape structure into consideration to describe flow pathways in the agricultural catchment. A new approach is proposed to build the drainage network which is based on the identification of the inlets and outlets for surface water flow on each farmers' field (or plot), estimating the relative areas contributing to the surface yield. ...

The structural framework for a parametric catchment erosion model is proposed. A parameter optimization technique that provides a rational basis for the calibration of the model is developed. The adequacy of the model in representing a natural catchment is investigated.

Riparian zones can provide a protective buffer between streams and adjacent land-based activities by removing nitrate from shallow groundwater flowing through them. Catchment-scale waterquality models are useful tools for predicting catchment behaviour under various climatic conditions and land-use scenarios. In this paper, we use the Riparian Nitrate Model (RNM) to investigate the potential ro...

in semi arid area geomorphological impacts of dams are very major. dams, as man- made structures, have major impacts on river hydrology, primarly through in the timing, magnitude, and frequency of low and high flows, ultimately producing a hydrologic regime differing significantly from the pre-impoundment natural flow regime. despite the profiles of dams on river regulation for water resources ...

Investigation of dominant hydrological processes in a tropical catchment in a monsoonal climate via the downward approach L. Montanari, M. Sivapalan, and A. Montanari DISTART, Faculty of Engineering, University of Bologna, Viale Risorgimento 2, 40 136 Bologna, Italy Departments of Geography and Civil & Environmental Engineering, University of Illinois at Urbana-Champaign, 220 Davenport Hall, 60...

The reduction of sulfate (SO42−) represents an alternative terminal electron acceptor for the oxidation organic matter in peat soils. greenhouse gas budget peatlands will be constrained by how much a peatland can utilize SO42− as to methanogenesis. Using records atmospheric deposition and stream chemistry coupled with elemental analysis soil, vegetation, particulate (POM) dissolved (DOM), this ...