The aim of the present study was to understand the effect of reservoir configurations on sediment pesticide fate. Two dams were selected on the River Garonne, in southwest France: Carbonne and Golfech, both with reservoirs subject to accumulation of herbicide-contaminated sediment. They are situated upstream and downstream respectively of an agricultural and urban area: the Mid-Garonne. The res...

Lake Powell is a large reservoir in Utah and Arizona that has experienced large changes in water level during a recent drought. As a first step in assessing the connection between hydrologic and chemical changes at Lake Powell, we characterized the particle size and solid-phase bulk concentrations for 31 elements and 25 minerals in sediment from the inflow region and some shoreline locations by...

Many lacustrine chronology records suffer from radiocarbon reservoir effects. A continuous, accurate varve chronology, in conjunction with accelerator mass spectrometry (AMS) 14C dating, was used to determine the age of lacustrine sediment and to quantify the past 14C reservoir effect in Sugan Lake (China). Reservoir age varied from 4340 to 2590 yr due to 14C-depleted water in the late Holocene...

Spatial and temporal variability of phosphorus (P) fractions content in bottom sediments of a shallow preliminary reservoir was studied in Antoninek, situated in Poznań. Fractions were analyzed at least once in a season (more often in spring and summer) between August 2004 and November 2005 according to the fractioning protocol proposed by Psenner et al. (1988). Circa 10 cm thick sediment layer...

A GIS-based method is proposed for computation of temporal variation of sediment yield during isolated storm events. Data from three Indian catchments, namely Karso and Nagwa in Jharkhand and Kharkari in Rajasthan, have been used. The Integrated Land and Water Information System (ILW1S) GIS package was used for (a) catchment discretization into cell areas using grid networks, (b) evaluation of ...

The severe incidences of Microcystis blooming in 1980s of the Sagami and Tsukui reservoirs, located in Sagami river, Japan were effectively controlled by the installation of 8 and 5 bubbling circulation systems, respectively. However, the blooming had started again in those reservoirs. It was found that those algal blooming occurred due to the formation of strong stratification following a temp...

The Klingnau reservoir, situated in north Switzerland, suffers from sedimentation in its left enlargement. The dam is placed in the Aare River about 1 km upstream of its confluence with the Rhine. Due to natural conservation and flood protection reasons, it has been sought for decades to slowdown the sedimentation process in the reservoir. For this purpose, 20’000 m3 of deposited material will ...

The fate and transport of mercury are of critical concern in lowland floodplains and wetlands worldwide, especially those with a history of upstream mining that increases the mobility of both dissolved and sediment-bound Hg in watersheds. A mass budget of total mercury (THg) quantifies sources and storage for particular areas - knowledge that is required for understanding of management options ...

Papers reviewed 1. C.A. Onstad and A.J. Bowie, Basin sediment yield modelling using hydrological variables. 2. T. Mizutani, Erosion processes in mountain basins in humid regions. 3. I. Bogardi, L. Duckstein, F. Szidarovszky andM. Fogel, Reservoir sedimentation under uncertainty: analytic approach versus simulation. 4. J.P. Bennett and CF. Nordin, Simulation of sediment transport and armouring (...

Sediment management is guided by both technology and local so-cioeconomic conditions.llpstreaa management in China emphasizesgully control. Warping of land is practiced wherever conditionspermit. Both make use of sediment as an asset. Sediment is alsoused to enlarge Yellov River levees to 50 to 70 m wide.Useful storage capacity of a large reservoir may be preservedpe...