CAA (Professionals) — Two Tree failures in a week (一週兩宗樹木意外)

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會員們:

 

香港在過去一週內,發生了兩宗嚴重樹木意外:

 

1.  般咸道塌樹http://hk.on.cc/hk/bkn/cnt/news/20150422/bkn-20150422213041846-0422_00822_001.html )

從報導中可以看到,整棵大樹橫臥在繁忙路段之中,輕微壓到路過車輛,沒有人員傷亡,真是不幸中的大幸。

 

這是一棵少有的完全全長在水泥地之上的 “古樹名木” ,算是根系翻起以後,下面都看不出有多少泥土存在。  翻根的大樹是榕科,榕樹一直都有沒土長在建築物樓梢的記錄,能在水渠邊上的噴漿水泥縫中生長,不足為奇。

 

也許很多人沒有留意到,其實大樹的固定根是結構良好,並非好像底部接觸水泥地面那般因磨損而生菌腐蝕的。 也有會員匯報意外發生前的半小時,那裡由於季候風到而刮過一場陣風,是否這風把固定根突然拉斷倒塌,則不得而知。

 

据報這樹在翻根之前,表面並無例如子實體、葉變或局部萎縮等等的根腐病徵狀,看來以後樹藝師在檢查這般樹木之時,可能需要格外留神了。

 

2. 春秧街塌枝 (  http://hk.on.cc/hk/bkn/cnt/news/20150425/bkn-20150425155718273-0425_00822_001.html )

這剛好在上述般咸道塌樹的六天後發生,時間同樣是午後,但這次卻不幸地導致一名老婦頭部擊傷,有幸傷勢不算嚴重。  以傷者這把年紀、擊中的部位和斷落枝條的大小重量來推算,這次意外沒有造成更嚴重後果,可算是非常的走運了。

 

由於這次意外是斷枝而不是翻根,所謂的甚麼 “褐根病” 等等,与這次事件很難扯上直接關係。 至於是否由於之前修剪失誤或檢查失當,這要留待日後公佈才能了解真相。

 

 

香港風雨未到,嚴重樹木意外已經接二連三到臨, 而香港過去三年都已經砍走市區大樹五萬有多,又說年耗四億八千萬港元去 “處理樹木” ,但結果仍然如此,成效令人猜疑。  這究竟是人為錯失,包括以前的設計責任,還是真正的 “自然天災” ,事情可能有商榷餘地吧 …..

 

謹此致意!

 

中華樹藝師學會  會長 (www.chinaarbor.com)

 

歐永森

 

ASCA 美洲顧問樹藝師學會顧問樹藝師號 RCA#497 (http://isahkchina.blogspot.com/2010/12/isa-hkchina-rac-in-asia.html)

IACA 澳洲顧問樹藝師學會顧問樹藝師號 ACM 0412011 (www.iaca.org.au)

ISA 資深樹藝師/註冊攀樹師號 HK-0174BT (http://isahkchina.blogspot.com/2011/03/isa-hkchina-frist-bcma-in-asia.html)

ISA HK/China 執業樹藝師號 IPA-010908 (http://isahkchina.blogspot.com/2010/04/isa-hkchina-tree-news-1441-report.html)

ISA 認證“樹木風險評估員” (www.isa-arbor.com )

SCMN 專業調解及談判學會註冊調解員號 CM-0044 (http://isahkchina.blogspot.com/2012/01/isa-hkchina-mediation.html)

 

“如果樹木在設計和種植時犯錯,其護養必然昂貴,而最終也會變成"不定時炸彈" 。 ”

 

“速成出來的樹木評估員, 只能作出低質量的猜測。 大自然會決定成敗。 ”

 

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国内和台湾的朋友, 请查阅  www.chinaarbor.com  或 “脸书” Facebook (帐号是“中华树艺师学会”) 以取得其他文章。  本会的已发表文章都已放弃版权, 任何人可以自由转载作为教育目的, 但不能作为商业目的盈利。  任何人都可以申请加入本会, 会费全免, 会员名单从不公开。  有意者请将真实姓名、年龄、单位、职衔、最高学历、电邮地址、和手机号, 电邮到 egc@netvigator.com , 或传真到 +852-2679-5338 等待处理。  本会所发表的一切内容, 谨供参考, 并不接受任何责任, 敬请留意。

 

会员们:

 

香港在过去一週内,发生了两宗严重树木意外:

 

1.   般咸道塌树 ( http://hk.on.cc/hk/bkn/cnt/news/20150422/bkn-20150422213041846-0422_00822_001.html  )

 

从报导中可以看到,整棵大树横卧在繁忙路段之中,轻微压到路过车辆,没有人员伤亡,真是不幸中的大幸。

 

这是一棵少有的完全全长在水泥地之上的古树名木,算是根系翻起以後,下面都看不出有多少泥土存在。  翻根的大树是榕科,榕树一直都有没土长在建築物楼梢的记录,能在水渠边上的喷浆水泥缝中生长,不足为奇。

 

也许很多人没有留意到,其实大树的固定根是结构良好,并非好像底部接触水泥地面那般因磨损而生菌腐蚀的。 也有会员汇报意外发生前的半小时,那里由於季候风到而刮过一场阵风,是否这风把固定根突然拉断倒塌,则不得而知。

 

据报这树在翻根之前,表面并无例如子实体、叶变或局部萎缩等等的根腐病徵状,看来以後树艺师在检查这般树木之时,可能需要格外留神了。

 

2.   春秧街塌枝http://hk.on.cc/hk/bkn/cnt/news/20150425/bkn-20150425155718273-0425_00822_001.html  )

 

这刚好在上述般咸道塌树的六天後发生,时间同样是午後,但这次却不幸地导致一名老妇头部击伤,有幸伤势不算严重。  以伤者这把年纪、击中的部位和断落枝条的大小重量来推算,这次意外没有造成更严重後果,可算是非常的走运了。

 

由於这次意外是断枝而不是翻根,所谓的甚麽褐根病等等,与这次事件很难扯上直接关係。 至於是否由於之前修剪失误或检查失当,这要留待日後公佈才能了解真相。

 

 

香港风雨未到,严重树木意外已经接二连叁到临, 而香港过去叁年都已经砍走市区大树五万有多,又说年耗四亿八千万港元去处理树木,但结果仍然如此,成效令人猜疑。  这究竟是人为错失,包括以前的设计责任,还是真正的自然天灾,事情可能有商榷馀地吧 …..

 

谨此致意!

 

中华树艺师学会  会长 (www.chinaarbor.com)

 

欧永森

 

ASCA美洲顾问树艺师学会 顾问树艺师号 RCA#497 (http://isahkchina.blogspot.com/2010/12/isa-hkchina-rac-in-asia.html)

IACA澳洲顾问树艺师学会 顾问树艺师号 ACM 0412011 (www.iaca.org.au

ISA资深树艺师/注册攀树师号 HK-0174BT (http://isahkchina.blogspot.com/2011/03/isa-hkchina-frist-bcma-in-asia.html)

ISA认证 “樹木风险评估员” (www.isa-arbor.com)

ISA HK/CHINA执业树艺师号 IPA-010908 (http://isahkchina.blogspot.com/2010/04/isa-hkchina-tree-news-1441-report.html)

SCMN专业调解及谈判学会 注册调解员号 CM-0044 (http://isahkchina.blogspot.com/2012/01/isa-hkchina-mediation.html)

 

 

“如果树木在设计和种植时犯错,其护养必然昂贵,而最终也会变成 "不定时炸弹"  

 

“速成出来的树木评估员, 只能作出低质量的猜測。 大自然会决定成败。 ”

 

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Dear Station Members,

 

HK is unfortunate to have two consecutive counts of tree failure accidents within a week as follows:

 

  1.  Bonham Road Tree Accidenthttp://hk.on.cc/hk/bkn/cnt/news/20150422/bkn-20150422213041846-0422_00822_001.html)

 

Luckily only a passing car was slightly damaged without any personal injury.  For a tree of this size falling on such a busy road, this outcome is absolutely a miracle.

 

The cause of the failure has been claimed to be a possible root failure, but it was reported by Station Members that a gust of strong wind was passing through the area due to monsoon arrival just a short while before the actual toppling.  As the tree was sitting practically on a cemented surface, root anchorage for strong support would be unlikely.  It may be just a time bomb exploded

 

  1. 2.     Chun Yeung Street Tree Accident (http://hk.on.cc/hk/bkn/cnt/news/20150425/bkn-20150425155718273-0425_00822_001.html  )

 

A branch snapped off a mature tree to hit & injure an 89 year old woman six days after the Bonham Road accident above.  The lady received a head injury & was hospitalized.

 

Consider the age of the victim, the force of impact & the size of the fallen limb, this event could be considered fortunate that no bigger harm was done.

 

As it had been a branch failure, the common “brown root rot” favoured by authorities over tree failures in HK probable may not apply.

 

 

No major storm or typhoon has yet arrived in HK in 2015, & already there have been two counts of serious accidents of tree failure.  It looks like that HK may be embracing herself for bigger events when the true disaster to come later in time.

 

best regards,

 

Sammy Au

Founding President (Station Manager) of China Arborist Association (www.chinaarbor.com)

ASCA Registered Consulting Arborist no. RCA#497 (http://isahkchina.blogspot.com/2010/12/isa-hkchina-first-rca-in-asia.html)

IACA Institute of Australian Consulting Arboriculturists Accredited Member no. ACM 0412011 (www.iaca.org.au)

ISA Board Certified Master Arborist / Certified Tree Worker no. HK-0174BT (http://isahkchina.blogspot.com/2011/03/isa-hkchina-first-bcma-in-asia.html)

ISA Tree Risk Assessment Qualified (www.isa-arbor.com)

ISA HK/China Independent Practicing Arborist no. IPA-010908 (http://isahkchina.blogspot.com/2010/04/isa-hkchina-hk-tree-news-14410-report.html)

SCMN Certified Mediator no. CM-0044 (http://isahkchina.blogspot.com/2012/01/isa-hkchina-mediation.html)

 

"Providing treatment without in-depth diagnosis & research support is professional misconduct. "

 

"Casual tree assessor delivers wanton tree assessment.   Mother Nature makes the rules."