三峡大坝为什么要蓄水175米,有何作用?

2025-02-14 21:14:35
推荐回答(1个)
回答1:

三峡大坝蓄水到175米,是经过
水电
科学专家几十年的科学论证得出的科学数据。如果到了175米,就有393亿立方米的
库容
,它就成为一个
河道

水库
,它的回水尾端可以到
重庆
朝天门码头
以上,它彻底改善宜昌以上600多公里的
上游
航运
条件,即使是冬季,
长江上游
来水偏少,也不会象在三峡工程修建之前的天然
航道

暗礁
多、
水流
急,
江面
窄,
大船
根本上不去,三峡大坝蓄水到175米后,万吨级
船队
可从上海直达重庆。2、可以在枯水季节,通过发电加大向
下游
的泄水流量,通常叫做补水,增加中下游的
水深
,保证航运安全,近几年都是这么做的,目前也正在做。你可以从新闻联播中得到可靠消息。好处多多。

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