The Station started its water impoundment on October 27, 2003. Its first generating unit will be put into generation on April 1, 2004 according its planning.
The data measured show that the vertical and horizontal displacements of different points inside the dam are mainly caused by rock filling of the dam and water impoundment of the reservoir. The results also show that the crack water pressure in the dam foundation is proportional to the water level in the reservoir.
In combination with the 2# Diversion Tunnel Plug of Zipingpu Hydroproject, 3D nonlinear Finite Element Method (FEM) is used to analyze the deformation and stability of surrounding rock in the nearby region under three operation conditions. The action and influence extent that different supporting types and water impoundment exert on during excavation are discussed.
Shenyang city exists many problems of urban rainwater utilization such as urban rainwater utilization technique and theory, low water rate,low surface water impoundment ability and so on. The corresponding countermeasures according to the problems existing in urban rainwater utilization in Shenyang were proposed.
Shenyang city exists many problems of urban rainwater utilization such as urban rainwater utilization technique and theory, low water rate, low surface water impoundment ability and so on. The corresponding countermeasures according to the problems existing in urban rainwater utilization in Shenyang were proposed.
In the targeted 535-acre brackish-water impoundment (East Pool) where Phragmites dominated, the soil water chemistry was changed by introducing tidal salt water through water control structures in June of 1999.
Seasonal and diurnal changes of chlorophyll in a tropical fresh water impoundment
In response to anthropogenic disturbance, some native insects have become more abundant and widespread, such as Orthoptera in response to grazing and burning, and some Odonata in response to aquatic weeds and water impoundment.
Sedimentary C, N, and P concentrations increased with time and were related to land clearing, water impoundment, and agriculture practices, such as fertilization.
In this paper we have analyzed precise gravity survey and gravity effects resulted from water loading, crustal deformation, ground water level change and precipitation before and after the water impoundment in the Three Gorges Reservoir.
First discussed are the problems in which the equations are in ill-condition and the components are difficult to separate but the components in mathematic models are closely related. Then, a synthetic analysis method for the in-situ observed data of dams is proposed. Its key points are as follows. The straight analysis, inverse analysis and 3-D FE methods are synthetically used to separate each component from observed values, and the working behaviour of the dam is judged by using the variation law of time effect...
First discussed are the problems in which the equations are in ill-condition and the components are difficult to separate but the components in mathematic models are closely related. Then, a synthetic analysis method for the in-situ observed data of dams is proposed. Its key points are as follows. The straight analysis, inverse analysis and 3-D FE methods are synthetically used to separate each component from observed values, and the working behaviour of the dam is judged by using the variation law of time effect component. Finally, the method is applied to analyse the observed data of a gravity arch dam whose observed values are changing in the initial stage of water impoundment, and the result obtained conforms to the realistic working state of the dam.
In order to study the performance of CFRD, regression analysis and inverse analysis are adopted to investigate the observed data of displacement of the rockfill dam under and after construction. That is an experimental dam in the seventh Five Year Plan of our country. Statistical models and mixing models are established. The findings show that the observed data of displacement of the rockfill dam can be detached according to...
In order to study the performance of CFRD, regression analysis and inverse analysis are adopted to investigate the observed data of displacement of the rockfill dam under and after construction. That is an experimental dam in the seventh Five Year Plan of our country. Statistical models and mixing models are established. The findings show that the observed data of displacement of the rockfill dam can be detached according to independent variable factors, that the creepage of the rockfill body during construction can not be neglected and that there are intervals between the experimental values and the values of inverse analysis of parameters of stress strain relation of the rockfill body. If the observed data after water impoundment are analysed and the prognostive equations are established, the monitoring and feedback about safe performance of CFRD can be realized.
The article, in accordance with the characteristics of water impoundment and discharge of the projects on the Yellow River, Suggests an approach to estimate the reduction of the outage time and the increase of water supply on the lower reaches of the Yellow River in the low water period with the Longyangxia and Liujiaxia reservoirs' joint operation. Based on the analysis of the measured data from 1986 to 1992, it is concluded that during the low water season on the lower reaches of...
The article, in accordance with the characteristics of water impoundment and discharge of the projects on the Yellow River, Suggests an approach to estimate the reduction of the outage time and the increase of water supply on the lower reaches of the Yellow River in the low water period with the Longyangxia and Liujiaxia reservoirs' joint operation. Based on the analysis of the measured data from 1986 to 1992, it is concluded that during the low water season on the lower reaches of the Yellow River, the outage period was annually shortened by 2. 14 months, the water supply was increased by 1. 15 Gm3, therefore, the 2 reservoirs make a great contribution to easing the water shortage on the lower reaches of the Yellow River.
water impoundment
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