By studying the sovereignty dispute over the dredging of Huangpu waterway from 1900 to 1927 in Chinese history,it is evident that the "Treaty System",imposed on China by some western countries after their invasion of China,is inevitably fragile and limited.

Determination of water conveyance line for river dredging project on lower Tarim River;

For the purpose of improving environment for a long time at the lower reaches of Tarim river,discuss river improvement,include river dredging and ecological sluices.

Selection of tidal barrage site at Huangpujiang estuary by analytic hierarchy process method;