【摘要】 文分析了不同工程组成淤地坝的坝地面积与保收率随年份的变化规律，提出了坝地初始利用年份的确定方法，进而根据动态经济分析方法，推导出了预测淤地坝在经济计算期内坝地经济效益的计算公式，并结合工程实例做了计算。更多还原

【Abstract】 The paper analyused the law of annual variation of dam land area and food harvest ratewith different composition of soil-saving dam,and put forward the method of determining initial use,year of dam land .Furthermore,this paper ascertained the formula of calculating economic benefit of soil-saving dam by means dynamic economic method,and presented the calculating example.更多还原