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引浑(洪)淤灌,是干旱、半干旱地区用洪用沙、改造地形、改良土壤、建设基本农田的一种好措施,也是为江河减少泥沙危害的一种途径,在水土流失严重的黄河流域有悠久的历史.据历史记载,两千二百多年前的秦代,劳动人民就开始拦截山洪淤灌农田。富平的赵老峪,定边的八里河,礼泉赵镇和泾阳冶峪河是陕西历史上有名的四大引洪灌区。到近代,在洛河、渭河上相继修建了洛惠渠、渭惠渠,除清水灌溉外,还利用了浑水进行浑灌和淤灌,建设了关中粮棉基地。前些年,靖边县的杨桥畔大队引水拉沙、引洪淤灌造地一万余亩,把沙地
Dredging (flood) siltation is a good measure to use floods and sediments in arid and semi-arid areas, transform topography, improve soil and build basic farmland, and also provide a way for rivers to reduce the harm of sediment. Of the Yellow River basin has a long history.According to historical records, two thousand two hundred years ago in the Qin Dynasty, working people began to intercept flood irrigation silt farmland. Fu Ping Zhao Laoyu, Dingbian Bali River, Liquan Zhaoquan and Jing Yang River is the history of Shaanxi famous four flood diversion irrigation area. In the modern times, Luohui Canal and Weihui Canal have been successively built in Luohe and Weihe River. In addition to the irrigation of clean water, muddy irrigation and siltation were also carried out by using muddy water to build Guanzhong Grain and Cotton Base. A few years ago, Jingbian Yangqiao River Brigade diverted Lassa, cited Hong silting more than 10,000 acres of land, the sand