(1)計(jì)算流量過程線 (2)計(jì)算設(shè)計(jì)流量
(1)大小懸殊,對(duì)工程設(shè)計(jì)不利; (2)灌水時(shí)間斷斷續(xù)續(xù),對(duì)管理理不利.