(Continued from previous post)
Power is supplied by a variant of the same award winning v8 turbo power plant that Ferrari has been using for the past few years only this time it is paired with an all new 8 speed dual clutch transmission that comes from the SF90. Shifts are fast, smooth and seamless and the power from the twin turbo v8 is endless blasting to 60mph in 3.4 seconds. Not bad for a grand tourer! Although they call it a GT it actually falls in between a GT and a traditional sports car and is truly the perfect combination of both. You can drive it around town in a very civilized way, with soft suspension and a quiet exhaust note in Comfort mode but with a clockwise crank of the red manettino dial into Sport or Race mode, it becomes a canyon carving monster shrinking around you as you rip up the road or the track. Brakes are sharp and crisp and because the car is exceptionally light for it’s class, you do not feel like you are trying to stop a train.
Often times GT cars are the underwhelming ugly cousin of a car brand. Neither here nor there, they are usually heavy and lumbering with compromised looks and compromised performance. Ferrari managed to crack the formula on this one by leaning on it’s historical roots for design but relying on their modern technological know how to squeeze every bit of performance out of this thing. Despite it being the entry level car for the brand, it’s probably my favorite Ferrari in it’s current lineup. @ferrari @ferrariusa #FerrariRoma
同時也有1部Youtube影片,追蹤數超過23萬的網紅Coco哥,也在其Youtube影片中提到,挑戰巨浪! 差d浸死! #黃金海岸 學 #滑浪 dji spark航拍機 #Surfing on #GoldCoast Surfer Paradise #brisbane #Aust #Queensland Rip Current Science https://www.youtube.com...
rip current 在 本土研究社 Liber Research Community Facebook 的最讚貼文
【研究閱讀】讀萬卷書 行麥理浩
“It represents a valuable natural resource for the people of Hong Kong and an environmental heritage that desperately needs respect and protected, especially given the probability of continued future waves of immigration into the SAR.”
-Bernie Owen & Raynor Shaw
近年潮流興行山,係動盪下郊野公園成為唔少香港人透透氣嘅地方,上到山除咗可以打卡呃like,仲有咩可以欣賞同向個山學習呢?如果想知識型郊遊邊行邊學,研究員推介閱讀由香港資深地質學家 Bernie Owen (歐文彬) 撰寫的《Hong Kong Landscapes: Along the MacLehose Trail》。
全本書都以麥理浩徑作為敍述主軸,將10段嘅麥徑分段描述。每段都提供地圖指南,地質地圖同路線圖(Mapguides, Geomap & Trailmaps),比起相類似郊遊著作 (如劉克襄《四分之三的香港》唔同嘅係,少了一份文學記事,卻多了以地質學家的視野剖析唔同景觀形成及地質作用的知性。就例如係麥徑第二段約M034-M0359之間會望到大浪灣四個沙灘包括西灣、鹹田灣、大灣和東灣。
大家除咗讚嘆壯麗嘅西貢「四灣」之外,可從書中讀到係沙灘上見唔見到有離岸流(Rip current)。書中圖文並茂,顯示出波浪達到西灣近岸淺水區,波浪會在破碎帶(surf zone)破碎,沖上海濱的海水稱為沖流(swash),從海濱回到海中的海水為回流(backwash),當大量海水回流到海中時又被新的沖流推進,就會容易形成離岸流,最高速可以去到時速每秒兩米,會令你看到美景之餘亦認識到當中的危險性。
又例如當作者行到清楚見到馬鞍山嘅馬鞍形狀,就交代了由於馬鞍山同牛押山係由較堅硬的凝灰岩(Tuff)組成,而兩個山峰之間嘅山坳由於有斷層(Faults )同弱線(line of weakness),所以經日月洗禮之後就形成好似「馬鞍」,讓你也能在觀賞時能看出各種本土景觀的前世今生。
近日研究員也有拜訪作者歐文彬教授,提到書中有些地方已經出現變化,讀者可以當本書作為參考基線來 (baseline) 比較不同地景變化,更提到希望讀者睇完本書再行麥理浩徑時能更了解沿途不同地貌嘅變化,久而久之可以支持香港環境保育工作。
而家政府成日對郊野公園虎視眈眈,一係話要發展「邊陲」,一係就話將郊野公園旅遊化,除左睇靚景透透氣,深度了解郊野公園自然景觀價值及當初原意,可讓現時的郊遊熱行多一步。
P.S. 有意借閱可inbox我哋
#智識型郊遊
#郊野公園
#麥徑愛好者必讀
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rip current 在 Follow XiaoFei 跟著小飛玩 Facebook 的最佳解答
這個標誌是危險的宣傳,它提升了瀑布暗流的神話。 如圖所示,在此瀑布中,任何其他瀑布中,甚至在海灘上都不會出現暗流。 除少數極端情況外,唯一會在大壩和水力發電廠的排水管附近找到類似水流的地方。 由於在池底沒有出口流出,因此自然界中不容易發生這種現象。 在瀑布底部或附近漂浮的困難是由於與水中混合的空氣有關的浮力的變化,而不是向下的水流。
實際上,該瀑布的流入和流出都在水池的表面。 這意味著最強的水流在水面上,最弱的水流在底部。 在一年中的大部分時間裡,幾乎沒有地下暗流。 如果您沒有在頂部看到它們,它們就不會隱藏在底部。
當河流中有大量的水流過時,瀑布的力量會在水池表面形成一個小的凹陷,導致水向該方向流動。 多數反彈並產生從池中流出的水流。 有些也從瀑布流回到瀑布下的凹陷處。 這些僅表面水流。 由於水只能從較高的高度(例如,地面)向下流動,因此它們不會在池中深處延伸。
因此,要逃開這些水流的正確方法是在它們下面游泳。 表面水流將您反覆拉出來,而不是暗流。 因此,要逃脫,您需要向水底下游泳。 這是應該在標誌上顯示的消息。 逃脫離岸流方法相同,在這裡也適用。卡住在垂直的水流中游泳,不要跟它對抗。但要在瀑布前游泳,是有悖常理的。中心的水流將帶您離開瀑布跟水池。這些訊息應該要標示在告牌上。就像在海灘告示牌上一樣,有標示如何逃開離岸流,所以這裡也應該有標示如何逃開瀑布中的水流。 但相反地,這個標誌沒有提供任何有用的訊息,實際上還具有誤導性。 這是進行水安全教育的尷尬方式。
附註1:這僅適用於一個水池範圍。 在河流中,整個橫截面都在流動,由於摩擦因素使其底部水流動仍然較慢。 而表面的水流動得更快。
附註2:颱風過後,當河流太大而超過水池的承載能力時,以上這些規則將失效。 這並不重要,因為對於任何理智的人來說,顯然無論如何在颱風過後是不要進入溪河裡。
This sign is dangerous propaganda which promotes the myth of the waterfall undercurrent. Currents as depicted in this picture do not occur in this waterfall, any other waterfall, or even at the beach for that matter. With a few extreme exceptions, the only place you will find currents like that are near drainage pipes for dams and hydroelectric power plants. It's not a phenomenon that can occur easily in nature because there is no outflow at the bottom of the pool. Difficulties with staying afloat at or around the base of the waterfall is due to changes in buoyancy related to air mixed in the water... not downward currents.
In fact, the inflow and drainage for this waterfall are both on the surface of the pool. This means that the strongest currents on the surface of the water, and the weakest currents are on the bottom. For most of the year there are barely any subsurface currents at all. If you don't see them on top... they aren't hiding on the bottom.
When there is a lot of water flowing in the river, the force of the waterfall creates a small depression in the surface of the pool, causing water to flow in that direction. The majority bounces out and creates a current flowing out of the pool. While some also flows back to the depression under the waterfall, typically from the side. These surface-only currents. They do not extend deep in the pool as water can only flow downward from a higher elevation (eg, the surface).
Therefore, the proper way to escape these currents is to swim under them. Surface currents are pulling you out, not undercurrents. So to escape you need to swim down. The same method for escaping a ripcurrent will also work here. Swim perpendicular to the current you are stuck in, not against it. It's counterintuitive, but swim in front of the waterfall. The current in the center will take you away from the waterfall and out of the pool. This is the message that should be on the sign. Just like at the beach there are signs explaining how to escape a rip current, there can be signs explaining how to escape a back current in a waterfall. Instead this sign provides no useful information, and is in fact misleading. It’s an embarrassing way to conduct water safety.
Note: This only applies to pools. In a river the entire cross sectional area is flowing, although it's still slower at the bottom due to friction. Surface water moves faster.
Note 2: After a typhoon when the river is so large as to exceed the carrying capacity of the pool, these rules breakdown. It's not important because to any sane person, it's obvious not to go into the river after a typhoon anyway.
rip current 在 Coco哥 Youtube 的最讚貼文
挑戰巨浪! 差d浸死! #黃金海岸 學 #滑浪
dji spark航拍機
#Surfing on #GoldCoast Surfer Paradise
#brisbane #Aust #Queensland
Rip Current Science
https://www.youtube.com/watch?v=RJ4hcaJ91TY
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rip current 在 Rip Currents - NOAA's National Ocean Service 的相關結果
A rip current forms when a narrow, fast-moving section of water travels in an offshore direction. Rip current speeds as high as 8 feet per second have been ... ... <看更多>
rip current 在 What is a rip current? - National Ocean Service 的相關結果
Rip currents are powerful, narrow channels of fast-moving water that are prevalent along the East, Gulf, and West coasts of the U.S., as well as ... ... <看更多>
rip current 在 Rip current - Wikipedia 的相關結果
A rip current, often simply called a rip (or misleadingly a rip tide), is a specific kind of water current that can occur near beaches with breaking waves. ... <看更多>