Page 14 - ICE 2023 Ebook file

ICE Breaker 2023 Knowledge – Hong Kong Association

Jordan Valley nullah visit

By Chan Wai Chak
The technical visit of Jordan Valley nullah was held on 6 August 2022. The nullah was revitalized to
improve its riverside landscape from a concrete channel to a multi-functional channel with the elements
of sustainability and recreation.
The speaker, Mr Ronald Siu, commenced the visit with the revitalization considerations in the upstream
and downstream area. The original upstream area was steep with the speedy water flow. DSD optimised
the upstream area with 15 fish ladders（魚梯）and 15 shallow fords（淺灘）in a zigzag pattern. It
created a progressive area for fishes and slower the speed of water flow. The optimisation provides
a suitable environment for species of reptiles and freshwater fishes. Meanwhile, the original concrete
channel in the downstream area was revised with the implementation of ecological systems. The
planters alongside the sides of concrete channel were planted with eco - bags on top of the concrete
surface. The speaker stated that there were limited quantities of floral species that are available in Hong
Kong waters. As a result, DSD selected the suitable floral species to improve the riverside landscape
of the channel. The riverside landscape not only improved the environment of downstream area, but
attracts different species of butterflies and dragonflies which forms a comprehensive ecosystem on the
river.

Furthermore, a viewing platform was built on top of the cross area of the upstream and downstream
where the eco - friendly timber was applied. It is a recreational spot for the public on top of the channel.
More features were designed for interaction with the public which includes the “Selfie” spots and
sustainable standing area. These features further integrated the revitalised nullah into the riverside city.

It was a successful sharing in nullah revitalisation which contained the elements of sustainability and
recreation while the capacity against flooding was not affected.
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6-1 more photos

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Overall event score: 7.75/10
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