推荐回答（3个）
利:
防洪方面我国非常典型东南季风气候降雨分布非常均匀，三峡工程修建非常有效提高下游防洪标准，而且还有效地延缓河流淤积长江三峡工程，直接确保下游防洪体系内近2300万亩耕地和1500万人民生命财产，及京广、京九铁路大动脉安全守护神电力方面。
总发电量达1050亿度，地处我国腹地至全国各大负荷心输电距离均约1000公里内，未来全国各大电网联网心航运方面。发展和繁荣长江两岸至沿海地区经济另外三峡工程还对环境、南水北调、养殖等多方面具有大益处 。
弊:
三峡大坝虽号称大量发电而长江支流上修水电站发电量达了三峡，耗费巨资修建三峡电站其发电量并未想象大，大坝建立影响了当地地质基础稳定三峡大坝拦截水量庞大重力已开始，好几地点侵蚀长江陡峭边岸，再加上水位波动频繁因而引发了系列滑坡灾害也使得大坝附近地区地质结构被破坏只有滑坡危害地震发生频率也比前增大了，生态方面三峡工程兴建会对当地大范围生态造成影响像当地植被破坏气候变化对各种动植物影响都非常大。
这个问题要分两部分回答：
专家们提出三峡工程三峡的弊端在哪里呢,三峡大坝突显出以下几个问题：1.对库区文物的影响：三峡大坝的建造使得三峡工程周边600多公里长的范围被淹没,大量文物被淹没至水下,无法挖掘出来,损失了大量的精神文化瑰宝.2.影响神态环境：三峡大坝的建立使得长江水位达到175米,直接受淹没影响的陆生植物物种有120科、380属、560种.水生动物生活受到影响,环境的改变,阻断了中华鲟至长江口、至金沙江的洄游路线.3.移民问题：三峡工程全部竣工后,水库淹没区将涉及湖北和重庆的20个区市县,其中重庆16个区市县受淹,使得大量三峡周围民众移民,离开家乡.4.军事隐患问题：三峡水坝在现代战争中一但被击毁,则水库中的水即一泄千里,给长江中下游带来严重水灾.
针对第一点文物问题,党中央安排了大量的文物工作者对于库区文物进行转移,尽最大可能避免了文化瑰宝的损失.对于第二个生态问题,三峡大坝建成后,2001年库区内植物物种约4500多种,总体状况基本稳定,珍惜植物篦子三尖杉、福建柏、银杉、金钱松、黄杉、巴山榧保护良好,还发现了珍惜濒危树种小勾儿茶和红豆杉群落的新分布点.动物鸟类增添14种,爬行类增添1种,鼠类增添1种,金丝猴、黑叶猴等保护动物保护良好.生态环境趋于良好.而移民问题,在党的领导下,顺利完成了百万大移民的工作,并在新的居住点进行了妥善的安置.至于军事问题,我国的军事布置力量妥当,敌军无法深入攻击三峡大坝.
我们再来看看三峡工程利于我们的方面：1.防洪：三峡大坝建成后,将形成巨大的水库,使下游荆江大堤的防洪能力,由防御十年一遇的洪水,提高到抵御百年一遇的大洪水.2. 发电：三峡水电站是世界最大的水电站,这个水电站每年的发电量,相当于4000万吨标准煤完全燃烧所发出的能量.年发电846.8亿度.新世纪以来,人民生活水平日益提高,电器使用量越来越多,对电力需求越来越大.火力发电已经远远不能满足生产和生活用电的需求,三峡电站的电能供给更突显出极大的意义.3.航运：三峡工程位于长江上游与中游的交界处,地理位置得天独厚,通航能力可以从现在的每年1000万吨提高到5000万吨.4.灌溉：可以渠化三斗坪至重庆河段,可以增加葛洲坝水利枢纽以下长江中游航道枯水季节的流量.除此以外还有水产养殖、供水、灌溉和旅游等综合利用效率.给库区人民的经济发展带来极大的帮助和促进.
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