Thikaroad

algorithm

Elder Lister
What's so hard about puncturing a few holes on that KU wall so that the water goes on its way?
Ati atia? Water flows the other direction. It is the buildings put up in the river (bottom right) hapo kahawa sukari that are slowing water flow downstream and they should be removed from the riparian zone. And anyway the KU wall hapo kwa mto is not solid, ni grill and so has "many holes" to allow water flow in case of floods.

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KU wall kwa mto.

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algorithm

Elder Lister
If the wall is punctured the water would spread in a wider area making it shallow.
The KU wall is already "punctured". The water is actually coming from KU and "spreading wide" on thika road.

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After the water overflows through the puntured wall it finds itself on the service lane road against this huge barrier that forms the overpass at Kahawa sukari and so the water has nowhere to go.

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With the water trapped by the wall/"dam", the water therefore fills the depression (demu) until it gets to the point (northwards) where the raised overpass ends and that is when it crosses to the other side of the road and then flows down on the nairobi bound lane to rejoin the river.

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algorithm

Elder Lister
If the wall is punctured the water would spread in a wider area making it shallow.
Would puncturing more holes on the KU wall solve the situation? When water floods or fills a place, the water body maintains the same level. And therefore the water level inside KU (point A) and outside (point B) is the same. So puncturing more holes on the KU wall wont make water spread further from the road into KU at point B.

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Denis Young

Elder Lister
The KU wall is already "punctured". The water is actually coming from KU and "spreading wide" on thika road.

View attachment 94968

After the water overflows through the puntured wall it finds itself on the service lane road against this huge barrier that forms the overpass at Kahawa sukari and so the water has nowhere to go.

View attachment 94969

With the water trapped by the wall/"dam", the water therefore fills the depression (demu) until it gets to the point (northwards) where the raised overpass ends and that is when it crosses to the other side of the road and then flows down on the nairobi bound lane to rejoin the river.

View attachment 94972
Accurate. That kasmall stream is responsible for the flooding in that narrow section. There is very little that can be done to drain the water. Kahawa Sukari was a swamp.
 

Denis Young

Elder Lister
Who blocked what you referring as kamala stream ?
I am not quite sure if it is blocked. That section is even fenced with an open metal fence. But just like in many places, streams are turning into raging rivers because a lot of rain water is dumping into them.
 
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