深泓线 meaning in Chinese

channel line
line of maximum depth
talweg
thalweg
thatweg
valley line

First , according to measured data and literature , the river channel evolution rule and its reasons in the southern branch of the yangtze river are discussed from the perspectives of historic evolution , recent evolution and the tendency prediction of river channel evolution . besides , the local reservoir has been studied from the changes in thalweg and section as well as the calculation of local erosion and deposit . consequently , the stability and feasibility of reservoir construction in the river section are approved
首先根据大量实测资料及文献资料，就历史变迁、近期演变、河演趋势预测等方面，初步探讨了长江口南支河段河道演变规律及原因，并具体就深泓线的变化、主槽断面变化、局部冲淤计算等方面对拟建水库局部区域进行了分析，论证了工程河段建设水库的稳定性及可行性。