Hey, everyone!

This is Enta.

Going on an Overseas Business Trip as a Slope Engineer: Part 1 (Africa)

Going on an Overseas Business Trip as a Slope Engineer, Part 2 (Africa)

Going on an Overseas Business Trip as a Slope Engineer: Part 3 (Africa)

Going on an Overseas Business Trip as a Slope Engineer: Part 4 (Africa Edition)

Going on an Overseas Business Trip as a Slope Engineer: Part 5 (Africa)

Going on an Overseas Business Trip as a Slope Engineer: Part 6 (Africa)

Going on an Overseas Business Trip as a Slope Engineer: Part 7 (Africa Edition)

Going on an Overseas Business Trip as a Slope Engineer: Part 8 (Africa Edition)

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In Japan,There is no such thing as a rainy season.

It's the kind of weather you're all familiar with, isn't it?

And right now, it's the middle of winter in Japan!

I've heard it's freezing cold.

 

On the other hand, Kenya is a pleasant place to live.

And quite a bit, actually.

There's no pollen, so I'm feeling really great lol

So, what’s the rainy season like in Kenya, Africa?

 

Kenya's Climate: Average Annual Temperature and Precipitation

Climate in Africa: Country-by-Country Table

The red areas indicate rainfall during the rainy season.

There are way more Japanese people, aren't there?

I suspect that localized heavy rain and inadequate infrastructure are likely causing floods and landslides.

Since it's open land, you wouldn't expect flooding to occur, but apparently there are areas where it does happen.

 

As for flooding, I think it will occur because there is no capacity for water collection or drainage.

Also, since there’s a lot of flat land, it’s inevitable that some areas will be prone to flooding.

It's the same with the gravel on the slope.

Since rainwater cannot be collected on the slope shoulder, it is released all at once toward the slope face, causing localized sediment movement and scouring, which results in the formation of gullies.

 

To prevent rust from forming, the basic approach is to identify the source and treat it there.

How should we handle that?

And how can we prevent it from flowing down the slope?

...becomes important.

However, since it is raining, measures must also be taken to protect the slope itself.

 

It is necessary to prevent rain from falling directly on the natural ground and to minimize infiltration.

It’s like the rain falling on the slope is being effectively channeled away.

From right to left!!? lol

To put it in numerical terms, if 100 units of rain fall on a slope, 70% flows down the slope and 30% is absorbed by the slope.

That's the general idea.

I think that level of reduction would go a long way toward preventing erosion and landslides.

The next step is to reduce the excess pore water pressure inside.

That alone should yield significant results.

In Japan, you could call them "vegetation mats."

It would be interesting to find such products in Africa and test them out.

I suppose bringing in products made in Japan would be a good idea, but I don't think the price would be right, and

I think that relying on material aid—which could prevent Africans from gaining an education—is a mistake in the long run, so local production for local consumption in Africa is probably the best approach.

 

Surprisingly, this isn't widely known among us construction companies, but major design firms and general contractors are actually quite active in overseas projects.

I can sort of understand the construction part, but there’s so much included here regarding proposals and maintenance as well.

This is exactly what the saying “A frog in a well knows nothing of the ocean” means.

I had absolutely no idea lol. Sorry about that ^^

Major companies remain a force to be reckoned with, not only in Japan but also overseas!

I'm truly impressed by the amazing abilities of the Japanese people.

So,

 

See you later.