搭乘 Emerald Luna 河輪悠遊多瑙河,除了欣賞沿途二岸的風景之外,還能「親身體驗」船是如何「上樓梯」,雖然我們早已經知道世上最知名的巴拿馬運河,是如何克服海面高低差如何讓船渡過的原理,但親身體會還是很不一樣,而且可以親眼見證船是如何一步步「升高」,本篇就來跟大家聊聊 Emerald Luna 翡翠河輪如何進閘道、上樓梯。
= 河輪上樓梯原理 =
當我們搭乘河輪,在多瑙河旅行,中途會遇上數個高低差不等的河道,單單從匈牙利布達佩斯,到德國雷根斯保這一段,就會經過 14 個高低落差的河面,而河面的落差最高可達到 27 公尺高。
雖然不是一口氣爬昇 27 公尺,如果是下行還好,但如果是「上行」的話,船又該如何克服河面高低的落差呢?
![[2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯 [2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯](https://hojenjen.com/wp-content/uploads/20221210161009_25-scaled.jpg)
圖01
如上圖所示,當遇上有著極大的落差,船是無法克服這麼大的落差,此時船該如何「上樓梯」,登上較高的河面呢?
![[2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯 [2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯](https://hojenjen.com/wp-content/uploads/20221210161023_81-scaled.jpg)
圖02
首先是先開啟第一道閘門,讓船先開進來。
![[2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯 [2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯](https://hojenjen.com/wp-content/uploads/20221210161030_73-scaled.jpg)
圖03
接著當船進入到閘道內,就會把第一道閘門給關閉起來。
![[2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯 [2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯](https://hojenjen.com/wp-content/uploads/20221210161037_15-scaled.jpg)
圖04
接著第二道閘門,引河水進到閘道,船因此而昇高。
![[2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯 [2022 Emerald Luna 翡翠河輪旅行] – Emerald Luna 翡翠河輪進閘道上樓梯](https://hojenjen.com/wp-content/uploads/20221210161044_72-scaled.jpg)
圖05
接著第二道閘門關閉,船就成功登上樓梯,克服河面的高低差。
雖然原理上是不難理解,但是若要「親自見證、感受」可真的是蠻有趣的,底下這段影片來跟大家分享 Emerald Luna 翡翠河輪,如何進閘道、上樓梯,克服落差高達十幾公尺河面度落差的過程。
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