TY - GEN
T1 - Analysis of the influence of Deep Waterway Project on morphological evolution in the north passage of the Changjiang Estuary, China
AU - Pan, Lingzhi
AU - Ge, Jiangzhong
PY - 2011
Y1 - 2011
N2 - Based on the difference of flow field, suspended sediment concentration and transportation in the North Passage between in Jan. 1998 and in Feb. 2008 using Delft3D model, the dynamical mechanisms of the morphological change in the North Passage are discussed in this paper. The results are summarized as follows: 1) the water depth in the North Passage has increased due to the enhanced resistance produced by the groins of the Deep Waterway Project. The ebb tide current is significantly blocked by these dikes and groynes. 2) The flow field also has been changed by the increased water depth, including that the flow velocity has decreased in the entrance region and the dikesgroins region and decreased in the upper and middle regions of the main channel, and increased in the lower and partial of upper region. The location of maximum velocity has moved downstream from the middle to lower region of the main channel, the maximum velocity is 0.2m/s larger in Feb. 2008 than that in Jan. 1998, and the velocity amplitude in dikes-groins region has about 1.0 m/s decreasing in Feb. 2008 compared with that in Jan. 1998. 3) The locations of weakened and increasing velocity are identical with the regions of significant sediment deposition and erosion respectively. 4) The construction has blocked the cross-dike transportation of high-concentration suspended sediment from Jiuduansha Shoal into the North Passage. 5) In the future, the region of entrance and dikes-groins might have potential trend of siltation process, especially the dikes-groins region built during 2nd phase.
AB - Based on the difference of flow field, suspended sediment concentration and transportation in the North Passage between in Jan. 1998 and in Feb. 2008 using Delft3D model, the dynamical mechanisms of the morphological change in the North Passage are discussed in this paper. The results are summarized as follows: 1) the water depth in the North Passage has increased due to the enhanced resistance produced by the groins of the Deep Waterway Project. The ebb tide current is significantly blocked by these dikes and groynes. 2) The flow field also has been changed by the increased water depth, including that the flow velocity has decreased in the entrance region and the dikesgroins region and decreased in the upper and middle regions of the main channel, and increased in the lower and partial of upper region. The location of maximum velocity has moved downstream from the middle to lower region of the main channel, the maximum velocity is 0.2m/s larger in Feb. 2008 than that in Jan. 1998, and the velocity amplitude in dikes-groins region has about 1.0 m/s decreasing in Feb. 2008 compared with that in Jan. 1998. 3) The locations of weakened and increasing velocity are identical with the regions of significant sediment deposition and erosion respectively. 4) The construction has blocked the cross-dike transportation of high-concentration suspended sediment from Jiuduansha Shoal into the North Passage. 5) In the future, the region of entrance and dikes-groins might have potential trend of siltation process, especially the dikes-groins region built during 2nd phase.
KW - Changjiang estuary
KW - Deep Waterway Project
KW - Sediment model
KW - Sedimentation process
UR - https://www.scopus.com/pages/publications/80052198006
U2 - 10.1109/RSETE.2011.5964685
DO - 10.1109/RSETE.2011.5964685
M3 - 会议稿件
AN - SCOPUS:80052198006
SN - 9781424491711
T3 - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
SP - 1957
EP - 1963
BT - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
T2 - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011
Y2 - 24 June 2011 through 26 June 2011
ER -