Reduced recruitment of yellow perch has been noted for a number of years in certain urbanized watersheds (South and Severn Rivers) of the Chesapeake Bay. Other rapidly developing watersheds such as Mattawoman Creek are more recently showing evidence of reduced recruitment of anadromous fishes. In this study, we used a battery of biomarkers to better document the reproductive health of adult yel...

Synthetic Aperture Radar images are routinely used for delineating flooded areas. Processing algorithms are often based on change detection techniques that enable a comparison of backscattering signals between the flood image and a reference image. However, as of today, there is little guidance on how to rapidly and reliably extract the most adequate reference image from an online archive. Our ...

In April 1994, chemical contamination of the River Severn aVected the water supply to a population of 160 000 in Worcestershire. During the incident the health authority free phone emergency helpline received 106 complaints of symptoms attributed to consumption of contaminated water. These complaints were important as they alerted the emergency incident team to the possibility of illness being ...

The tidal bore is a well-known phenomenon in fluid mechanics, having been observed in many rivers around the world. Two of the better known rivers where bores regularly appear are the Severn River in England [1] and the Qiantang River in China [2]. The usual circumstances in which a bore can appear develop when a tidal swell causes a difference in surface elevation in the mouth of a river or fu...

Abstract. River-level estimation is a critical task required for the understanding of flood events and often complicated by scarcity available data. Recent studies have proposed to take advantage large networks river-camera images estimate river levels but, currently, utility this approach remains limited as it requires amount manual intervention (ground topographic surveys water image annotati...

Samples collected from power station intake screens between 1972 and 1977 have been used to study aspects of the biology of the whiting in the Severn Estuary and Bristol Channel. 0+ whiting generally started appearing in the inner estuary in July, at which time their standard length was at least 38 mm. Their numbers peaked in October and subsequently declined particularly rapidly during the wet...