Look from the vertical section plane , project two have not the delta conformation of fill up . project one lost the effectual contains of reservoir . in opposition , project two lost the dead contains . during the experiment of the local former in front of the dam , the quantity of the sandiness out the reservoir appears that lot of sandiness passed the bottom hole and little passed the electricity plant and the water gap 方案二与初设方案运用对比，方案二淤积总量明显减少，从淤积纵剖面看，方案二无明显三角洲淤积形态，而初设方案运用30年淤积形态具有明显的三角洲淤积形态，从库容变化看，初设方案运用主要损失有效库容，而方案二则相反主要损失死库容。
