1 引言1998年底,省水利厅根据沙、澧河河道储砂减少情况,下发了关于在沙、澧河全线禁止采砂的通知。沙、澧河禁采砂两年后,由于社会经济的发展和城乡建设规模不断扩大和建筑市场迅猛发展,砂石资源用量日益增加,市场上砂石资源存量不足,供需失衡,导 1 Introduction By the end of 1998, the Provincial Department of Water Resources issued a circular on the prohibition of sand mining in the entire Shahe and Bahe rivers based on the reduction of sand storage in the Shahe and Bahe River channels. After two years of sand mining and sand blasting, due to the development of society and economy, the continuous expansion of urban and rural construction and the rapid development of the construction market, the amount of sand and gravel used is increasing day by day. There is not enough stock of sand and gravel in the market and the imbalance between supply and demand.