Tuesday 27 November 2012

The drive downcountry (flash flooding field trip)

Last week I left Korr and travelled southwards overland. The first few of hours’ drive is on unmade roads and travel is tricky at the best of times but even more unpredictable in the rainy season. Riverbeds that are dry for most of the year become soft and muddy and we did quite a lots of slipping and sliding. We were pleased to cross straight through a major river that was in flow without much trouble. Soon after, though, it started to rain heavily and we rolled down the flaps on the back of the Land Cruiser to stop getting too wet!

There’s not much vegetation to intercept the rainfall, the ground quickly becomes saturated and infiltration rates slow down. We watched as the water flowed straight over the surface and into channels. Water levels in these channels rises very quickly to flood the land and roads but fortunately they also go down quite quickly.

We came to a place where the road was blocked by one of these fast moving flows. Whilst they are not necessarily very deep, they are fast and could easily sweep a vehicle away. An army truck had already stopped to wait which was a real blessing as we were able to follow them as they picked the best route through the water and back onto firmer tracks.

While we stopped for the water to go down enough for us to cross we were able to stretch our legs. You can see a wave of water coming down the channel.

We called in to visit the Form 4 students who were almost at the end of their final exams and not long afterwards we reached proper tarmacked roads. The journey in the back of the Land Cruiser was much smoother after that although it got noticeably cooler as we climbed higher. I put on a jumper for the first time in three months!

Along the way we spotted an elephant and ostrich.

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