Abstract

The Yellow River-crossing project (YRCP) with two parallel tunnels is the most critical structure on the trunk canal of the South-to-North Water Transfer Project (the Middle Route). The river reach of the project site is a typical braided river with the river span which varies from 7~11km. The tunnels crossing Yellow River will be 7.5 km in total length. The main channel is near the south stiff bank and main current is quite stable, while near the north bank there is broad flood plain that provides the advantage to shorten the tunnels. This paper mainly analyses the effect of the project under different waterway contraction options on the river regime and flood control based on the outcomes of the physical modelling and the reasonable width is put forward, which provides scientific basis for project design.

Keywords: Middle Route Project (MRP) for South-to-North water transfer, Yellow River-crossing project, waterway contraction; river regime, flood control, Physical modelling.