Even though these areas are dry most of the time they do quite often receive torrents of rain which cause flash floods, developing into rapid rivers which easily erodes the soil along the river banks.
(they; do receive; torrents of rain which cause flash floods; T:quite often) (torrents of rain; cause; flash floods) (rapid rivers; easily erodes; the soil along the river banks)
they torrents of rain rapid rivers
do receive cause easily erodes
torrents of rain which cause flash floods T:quite often
flash floods
the soil along the river banks