Studies of salt diffusion process and fluxes from seabed sediments to freshwater of the Polder reservoir
Date
2005
Authors
Zheng, Xilai, author
Gao, Zengwen, author
Wu, Junwen, author
Colorado State University, publisher
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Abstract
Based on field investigation and drilling, three kinks of original, disturbed sediments and local surface water were sampled near the Muguandao Polder Reservoir. Then, the temporal-spatial varieties of salinity in fresh water and pore water were measured carefully with conductivity apparatus using column and tank tests. At last, the salt fluxes released from the deposits were calculated. This research lays a scientific foundation for the evaluation and prediction of water quality of the impounding reservoir. According to the column tests, it has been found that a 7.5cm highly concentrated salinity layer is formed above the water-sediment interface due to molecular diffusion. However, salt concentration above the layer is relatively low and even. In addition, the column tests also show that salt discharge fluxes of silty clay, medium-fine sand and pelitic silt can be expressed as a negative exponential function. On the other hand, tank tests indicate that wind my influence the salt stratification above the interface, which is favorable to the salt mixture in the reservoir.
Description
2005 annual AGU hydrology days was held at Colorado State University on March 7 - March 9, 2005.
Includes bibliographical references.
Includes bibliographical references.
Rights Access
Subject
water-sediment interface
salt diffusion
Polder reservoir