Cumulative watershed effects (CWEs) result from multiple activities over time and space. The assessment of CWEs in the Sierra Nevada is severely limited by the lack of field data on the effects of a given action, the lack of models to predict the effects of multiple actions at the watershed scale, and the limited data relating stream channel conditions to measured or predicted changes in runoff...

Stream channel development in forested areas is profoundly influenced by large organic debris (logs , limbs and rootwads greater than 10 cm in diameter) in the channels. In low gradient meandering streams large organic debris enters the channel through bank erosion , mass wasting, blowdown, and collapse of trees due to ice loading. In small streams large organic debris may locally influence cha...

Several analytical techniques used on both conventional colour photographs from SKYLAB and the LANDSAT MSS data in both photographic and magnetic digital tape fonnats provide useful sources of information about regional and seasonal patterns of stream sediment discharges along New Zealand coasts. The large area synoptic views from space are superior to aircraft photomosaics. The green visible b...

This study investigated levels and distribution pattern of chlorinated organic compounds (COCs) otherwise known as organochlorine pesticides in sediment samples at downstream of Aiba watercourse in Iwo, South-western Nigeria. Soxhlet extraction method followed by GC-ECD analysis were used to ascertain levels of COCs in the sediment samples collected from four different locations along the strea...

Akarsular tarafından taşınan sediman miktarları, jeokimyasal döngünün, havzadaki toprak kayıplarının, erozyon oranlarının ve denüdasyon süreçlerinin bir göstergesi olarak kabul edilir her yıl dünya genelinde akarsuların yaklaşık 20 milyar ton sedimanı okyanus denizlere taşıdığı tahmin edilmektedir. Flüvyal süreçlerle oran miktarları üzerine yapılan birçok çalışma süspanse halinde katı sedimana ...

In the Three Gorges Reservoir (TGR), sedimentation of the riparian zone has occurred over the past 10 years. However, the sediment and related environmental effects have not been explored well. In the present study, sediment and soil in situ were collected in three sites of the riparian zone in the TGR. Samples were analyzed for water content, bulk density, pH, organic matter, total nitrogen, t...