Water conveyance in dried-up riverway and ecological restoration in the lower reaches of Tarim River,China;

This paper introduces an application method and procedure of CAD technology in river cross-section design, with software and hardware platform.

River section analysis is the foundation of riverbed evolution analysis.

Study on the affect of the drying up of the Yellow River on the ecological environment in the seawater near the delta;

According to the cutout charactoristic data of the lower reaches of the Yellow River,and using mathematical statistcs methods, the paper analyses the correlative relations among the cutout days,cutout length and the amounts of the silt accumulation in the lower reaches of the Yellow River.

The authors studies the impact on lateral seepage quantity and groundwater cycling caused by flow cutoff of Yellow River and compares it with that of the year 1999 through the numerical simulation model of groundwater flow system of affected zone.