渭河是黄河的主要支流之一,横贯关中地区,两岸工农业发达,人口稠密。渭河过咸阳铁桥后,地势平坦,比降变缓,河道左右摇摆甚为严重,有地段河床宽度超过四公里,成为游荡性河道,两岸滩地宽阔。随着人口增长,河滩地逐渐开垦耕种,由于这里地下水位高,沙性大,盐碱化严重,又常受洪 The Weihe River is one of the major tributaries of the Yellow River, running across the Guanzhong region. Both sides of the Strait have a well-developed industry and agriculture and a densely populated area. After the Xianyang Iron Bridge over the Weihe River, the terrain is flat and the specific gravity is lower than that of the Xianyang Railway. The river is swayed very much to the left and right. There are sections of riverbed more than four kilometers in width, becoming a wandering river with broad beaches on both sides. As the population grows, the floodplain gradually reclaims the cultivation. Due to the high groundwater level, big sandyness and serious salinization, it is often affected by flood