~ Water Facts
 ~ Progress @ Site
 ~ Safety
 ~ Environment
 ~ Orang Asli
 ~ Keeping Sg. Selangor Clean
 ~ News Room
 
     
   
  2000


MARCH


1 March 2000

Preparatory works begin at Kuala Kubu Bharu for Sungai Selangor Water Supply Scheme Phase 3 (SSP3)

Construction of a new access road for Kampung Gerachi will be implemented immediately to facilitate preparatory works for the Sungai Selangor dam at Kuala Kubu Bharu.

The new access road for Kampung Gerachi is part of the construction programme for the Sungai Selangor Water Supply Scheme Phase 3 (SSP3). It is being constructed for the Orang Asli to maintain access to their village during the construction period before the relocation of their village.

Once the new Gerachi access road is completed in Mid-April, the current road leading to Kampung Gerachi will be closed to allow works on the Sungai Selangor Regulating Dam to begin.

The new Kampung Gerachi access road is dedicated for the Orang Asli only. Gantries with 2.4 metres limiting height will be erected at both ends of the diversion road to prevent heavy vehicles from using the road. The new access road will connect Kampung Gerachi to KKB-Bukit Fraser Road near Pertak picnic area.

Construction works on the new Kampung Gerachi access road will not affect traffic flow on the KKB-Bukit Fraser road. Nonetheless, Syarikat Pengeluar Air Sungai Selangor Sdn Bhd (SPLASH), the concessionaire company for the project, advises road users to be careful and follow signages near the construction area.


Top of the page


8 March 2000

The Functions of a Spillway

Water conservation safeguards against times of water shortage. Among various methods of conserving water, a dam is built to store water for use in times of need. A dam is constructed of earth, rock or concrete and is designed based from studies that determine, among other factors, its location suitability and water storage capacity.

The water held in place by a dam is known as a reservoir. The reservoir is designed to hold and contain the water to a certain level. This water is released into the river and extracted into pumping stations and treatment plants for processing.

However, in situations of extremely wet seasons, the level of water collected in the reservoir may rise above this level. A safety measure incorporated as part of the dam structure, safeguards against probable spillage of this water in such a situation.

This safety precaution is the spillway. The function of the spillway is to lower the water level in the reservoir if it gets too high and threatens to overflow or spill.

The design of the dam and spillway structure allows for the spillway to discharge access water if it rises above the level. The top of the spillway is below the top of the dam. This is designed so that when the water level of the reservoir reaches the height at the top of the spillway, the water will flow over the spillway and not over the top of the dam.

Such situations of extremely wet seasons are known as Probable Maximum Flood, probable events derived from an adverse combination of very wet weather and very heavy rainfall.

However, there is no historical basis for these conditions.

The spillway is therefore a safety element to ensure that in case of a Probable Maximum Flood, water is discharged safely over the spillway and into the river.


Top of the page