Stable nitrogen isotopes were used to assess the effects of wastewater treatment plant (WWTP) upgrades on the utilisation of sewage-N by estuarine biota in Moreton Bay, Australia. We measured delta(15)N of filamentous algae, mangrove leaves and shore crabs at the Brisbane and Logan Rivers before and after scheduled WWTP upgrades, and at two reference rivers where WWTPs had been upgraded >4 year...

A detailed microbiological and parasitological survey of salmonids and indigenous fish in the upper reaches of selected river systems in Natal was undertaken. Fish were collected from the rivers by electro-fishing, from dams by gill netting and from hatcheries along the rivers. A total of 678 fish from 26 different sites along 8 river systems were collected. No parasites could be detected on fi...

Major volcanic eruptions in the central North river systems by dispersing through the sea. However, some Island of New Zealand and, in particular, an eruption dated rivers, that were probably severely affected in their at  186, spread ignimbrite and volcanic ashes (tephra) headwaters, have lower elevation and more distant over a broad area, deposition of which caused major tributaries whose c...

Frozen rivers in the Arctic serve as critical highways because of the lack of roads; therefore, it is important to understand the key mechanisms that control the timing of river ice breakup. The relationships between springtime Interior Alaska river ice breakup date and the large-scale climate are investigated for the Yukon, Tanana, Kuskokwim, and Chena Rivers for the 1949–2008 period. The most...

The Eastern Sahara (Fig. i) is devoid of surface drainage -this unusual characteristic distinguishes its morphology from that of most other desert regions where running water dominates landscape development (Peel, 1939). Cyclic aridity, which is responsible for the obscuring eolian blankets and wind-erosion effects, had set in by the Pliocene-Pleistocene transition, about 2 million years ago (W...

This technical note describes a method for verifying the representativeness of mean-value and extreme-value water quality monitoring locations. Recommended techniques are illustrated using data collected with the total dissolved gas monitoring system on the Columbia and Snake Rivers. This technical note shows how statistical techniques can be applied to the design of monitoring systems to ensur...

There is now widespread agreement that the surface of Mars underwent some degree of fluvial modification, but there is not yet full understanding of its surface hydrological cycle and the nature of standing bodies of water, rivers, and precipitation that affected its surface. In this paper we explore Erythraea Fossa (31.5 W, 27.3 S), a graben adjacent to Holden crater, which exhibits strong evi...

We introduce a new PDE free boundary problem that in a singular limit admits an interesting metaphoric interpretation, describing how “water” originating from “rainfall” flows along a landscape of varying height, forming “lakes” and also “rivers” and “surface flows”, the latter described by transport equations along downhill gradient flows.

4. Observations and Projections: Cryosphere, Ocean Dynamics, and Hydrology Introduction 4.1 The Cryosphere 4.1.1 Antarctica 4.1.2 Greenland and Eurasian Ice Caps 4.1.3 Montane Glaciers 4.1.4 Sea and Lake Ice 4.2 Ocean Dynamics 4.2.1 Sea Level Change 4.2.2 Ocean Heat 4.2.3 Ocean Circulation 4.2.4 Africa 4.2.5 South America 4.2.6 Antarctica 4.2.7 Northern Hemisphere 4.2.8 Miscellaneous 4.3 Precip...

Rivers sourced in the Himalayan mountain range carry some of the largest sediment loads on the planet, yet coarse gravel in these rivers vanishes within approximately 10-40 kilometres on entering the Ganga Plain (the part of the North Indian River Plain containing the Ganges River). Understanding the fate of gravel is important for forecasting the response of rivers to large influxes of sedimen...