中文摘要：

海河淤积问题严重阻碍着近代天津港口的发展，为解决这一难题，整理海河委员会、整理海河善后工程处和华北水利委员会先后办理了海河放淤工程，将含沙量最大的永定河洪水引入放淤区域，是永定河在官厅水库建成前防洪拦沙的最重要措施。工程在很大程度上减少了输入海河的泥沙量，同时也改变了放淤区域的农田耕种方式。放淤工程处于传统水利向现代水利的转型阶段，在中国水利史上具有重要的历史意义。

英文摘要：

The development of TianJing port was impeded by the serious silting in modern times. To solve this problem, the Haiho Improvement Commission and North China River Commission car- ried out Haiho （海河） colmation project, which diverted the floods of Yongding river into silt--depositing districts. As a result, Haiho silt was decreased largely, and the cultivation way of silt--depositing districts was changed by this project. The project had historical significance which reflected a transformation phase from traditional water conservancy to contemporary water conservancy.