A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study Breaking Mechanism of Karez Systems in Turpan Basin
The Karez water system is a sophisticated aquatic system developed under severe arid climate conditions. In this paper, we investigated the main cause of deterioration of this valuable ancient aquatic system which has supported Turfan oasis in China for long time. We surveyed the area, Turfan and surrounding cities to assess the current status of management in terms of civil engineering and the future preservation of Karez. Survey results revealed that Karez consists of main-dig canals whose low stability and high risk of collapse make it difficult to further excavate and restore.The Karez system composes mainly four parts that vertical shafts, transporting of water include collecting, open canal and storing water. In the most of the transporting part, the water table is located below the water level inside tunnels, resulting high percentage of water to be lost by percolation. When water percolates through the wall of the tunnel, it is not clear whether or not that enhances wall collapses. This study thus investigated the effect of water percolation on the deformation of walls of the transportation part in Karez channels. We used a numerical analysis program “ABAQUS” to solve coupled groundwater flow and ground deformation problems at the same time. Numerical simulation results showed that the Karez tunnel slowly recharges to groundwater. It also revealed that water rise by capillarity through the wall, which may cause some deterioration to the wall. From numerical simulation, we can get knowledge of flow and deformation for sustainable management and efficient recovery of the ancient Karez system.
Study Breaking Mechanism of Karez Systems in Turpan Basin
The Karez water system is a sophisticated aquatic system developed under severe arid climate conditions. In this paper, we investigated the main cause of deterioration of this valuable ancient aquatic system which has supported Turfan oasis in China for long time. We surveyed the area, Turfan and surrounding cities to assess the current status of management in terms of civil engineering and the future preservation of Karez. Survey results revealed that Karez consists of main-dig canals whose low stability and high risk of collapse make it difficult to further excavate and restore.The Karez system composes mainly four parts that vertical shafts, transporting of water include collecting, open canal and storing water. In the most of the transporting part, the water table is located below the water level inside tunnels, resulting high percentage of water to be lost by percolation. When water percolates through the wall of the tunnel, it is not clear whether or not that enhances wall collapses. This study thus investigated the effect of water percolation on the deformation of walls of the transportation part in Karez channels. We used a numerical analysis program “ABAQUS” to solve coupled groundwater flow and ground deformation problems at the same time. Numerical simulation results showed that the Karez tunnel slowly recharges to groundwater. It also revealed that water rise by capillarity through the wall, which may cause some deterioration to the wall. From numerical simulation, we can get knowledge of flow and deformation for sustainable management and efficient recovery of the ancient Karez system.
Study Breaking Mechanism of Karez Systems in Turpan Basin
Fu, Rongchang (author) / Shadeer, Muhetaer (author) / Tiyipujiang, Rexiati (author)
2014
6 Seiten, 6 Quellen
Conference paper
English
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