Bidirectional flows in a river system can occur under stratified flow conditions and in addition to creating significant errors in discharge estimates, the upstream propagating currents are capable of transporting contaminants and affecting water quality. Detailed field observations of bidirectional flows were made in the Chicago River in Chicago, Illinois in the winter of 2005-06. Using multip...

SPAtially Referenced Regressions On Watershed attributes (SPARROW) models were developed to estimate nutrient inputs [total nitrogen (TN) and total phosphorus (TP)] to the northwestern part of the Gulf of Mexico from streams in the South-Central United States (U.S.). This area included drainages of the Lower Mississippi, Arkansas-White-Red, and Texas-Gulf hydrologic regions. The models were sta...

Introduction In the lowlands of the upper Willamette River Valley, Oregon, winter flooding is an annual phenomenon driven by the seasonal precipitation regime of the Pacific Northwest (Hamlet and Lettenmaier 1999). Predictable inundation of river floodplains and expansion of stream networks like these are major processes influencing entire aquatic communities (which include fish, frogs, salaman...

The Sinos River basin is located Northeast of the state of Rio Grande do Sul (29° 20’ to 30° 10’ S and 50° 15’ to 51° 20’ W), Southern Brazil, covering two geomorphologic provinces: the Southern plateau and central depression. It is part of the Guaíba basin and has an area of approximately 800 km, encompassing 32 municipalities. The objective of this study was to monitor water quality in the Si...

Sea level rise could alter the boundary conditions of tidal rivers. This in turn would modify the hydrodynamic behaviour of coastal rivers and consequently their backwater rise. This paper presents the effect of modified boundary conditions on river peak stage and flow resulting from probable levels of sea level rise on the west coast of Peninsular Malaysia. The study site is a tidal affected r...

The Sinos River basin is located Northeast of the state of Rio Grande do Sul (29º 20' to 30º 10' S and 50º 15' to 51º20'W), Southern Brazil, covering two geomorphologic provinces: the Southern plateau and central depression. It is part of the Guaíba basin and has an area of approximately 800 km², encompassing 32 municipalities. The objective of this study was to monitor water quality in the Sin...

As “kidneys of the earth”, wetlands play an important role in ameliorating weather conditions, flood storage, and the control and reduction of environmental pollution. With the development of local economies, the wetlands in both the Amazon and Yangtze River Basins have been affected and threatened by human activities, such as urban expansion, reclamation of land from lakes, land degradation, a...

This paper investigates the efficiency of urban public transport systems in China by a data envelopment analysis (DEA) approach. Based on the data from 652 China cities in 2004 and 2006, we find that the efficiency of overall urban public transport system is relatively low but with a sign of improvement from 2004 to 2006. The urban public transport systems in east coast, south coast and middle ...

Developed for Internet-based simulations, the Urban Growth Simulator allows users to select from a suite of available options for growth management when generating build-out scenarios. With all required data layers for the 15-county region in northeast Ohio freely accessible and available from the simulator's server, planners, government officials, and the general public can use the Urban Growt...