The paper describes thesimulation, using the 1: 80 sediment model, of 21 water-sediment series from 1950-1970. Also, itanalyzes and predicts such formation and related sediment problems.
Study on water-sediment optimum allocation in upstream basin and comprehensive measures of sediment control in Guanting reservoirⅡ: Water-sediment optimum allocation and dredging schemes
Study on water-sediment optimum allocation in upstream basin and comprehensive measures of sediment control in Guanting reservoirⅠ:Reservoir sedimentation and general plan of water and sediment control
Starting from the variations in water-sediment conditions after Xiaolangdi reservoir operation, the developing trend of pollution sources is predicted. And then, based on two-dimentional water quality equation, and with industrial development speed, industrial pollution wading and cross section background concentration as the predicting combination conditions, the varying trend of COD Cr concentration of the average years in the year of 2010 in Mengjin-Huayuankou section is predicted.
Briefly introduce the influence of such factors as pH, Eh, temperature, ionic strength and organic matter on the transport of heavy metal in water-sediment system.
5. When there are more than two kinds of phenolic compounds in water-sediment system, competition adsorption would occur between them. The capacity of competition adsorption is determined by the sorption capacity and rate.
At the water-sediment interface, the concentrations of these elements had an obvious variation. In summer, Cr in the sediment had greater influence on the quality of overlying waters.
In order to recognize the storage law of methane hydrate in sediments,the filling rates of methane hydrate in water-sediment system were tested by use of a high-pressure hydrate-synthesized device. The influences of different initial generation pressures and temperatures and different sediment pore diameters on the filling rate of methane hydrate in sediments were investigated.
The upper (0-15 cm) layer of the sediment consisted mainly of S (24.2 Atom%), Fe (21.62%), Ca (18.4%), Si (14.3%), and (Al 6.3%) and reflected mainly processes proceeded in the anoxic water-sediment interface.
Three problems of heavy metal pollution in offshore sediment in Jingzhou Bay of the Bohai Sea were investigated in this work: (1) relation of concentration of zinc, cadmium, lead and copper with grain size of sediment; (2) partition of heavy metals between different geochemical phases in sediment, and (3) partition of heavy metals between different geochemical phases in the model of marin sediment, where flue dust, effluent, and suspended particles from the Huludao Zinc Smeltery situ...
Based on historical literatures and some available data, this paper summarizes human experiences about the regulation of the Jiaojian estuary and analyses the affect on the fluvial processes of estuary caused by regulating works. On the basis of its current regimes of water and sediment transportation and fluvial process, the utilization of water-sediment re-soureces is preliminarilly studied.
The evolution of the shoreline in a delta area has an unnegliegidle effect on the longitudinal profile of a river with a frequently changeable estuary. This paper shows the results of six experiment sets with different conditions of water-sediment inflow and tail-water-level hydrograph.A deve opment mode of the profile of an alluvial river is found as follows;1.In the case that the sea current can carry away the material coming from the river, the shoreline would be stable, a linear pro'fi...