二、从磨刀门水道变迁的规律看整治问题磨刀门和思贤滘都是重点整治地区,其整治目的有二:一是利用西江正干为排洪总道,要求畅通尾闾,提高泄洪排涝能力,二是综合开发海坦资源,适应发展经济的需要。(一)多开汉道,提高泄洪排涝能力磨刀门口外淤浅早在清代已有记述。磨刀门当日呈喇叭形,故称为“宽河口。”其水下 Second, from the changes in the law of Shaodongmen see rectification problems Shaodongmen and Si Xianghui are key areas for remediation, the remediation purposes are twofold: First, the use of the Xijiang River is the main drain for floods, require the smooth flow of Lu, improve Flood and drainage capacity, the second is the comprehensive exploitation of Hain resources to meet the needs of economic development. (A) to open more Han Road, improve flood discharge ability Shar t outside the door as early as the Qing Dynasty has been described. Grinding knife was flared the same day, it is called “wide estuary. ” Its underwater