Whilst they were out skiing they had an accident: they fell down a deep ravine.
It is not much fun on a mystery tour if one ends up in a ravine.
Watershed treatment typically is through afforestation, construction of percolation tanks, farm ponds, check dams, ravine reclamation structures, boulder checks, rubble checks, and vegetative checks for in-situ moisture conservation.
These chains of mountains are broken by numerous and steep canyons, narrow ravines and streams, the water beds of which are dry most of the year.
Eventually most of the population from the different villages, expecting to be attacked, either fled or assembled in the ravines to offer some kind of resistance.
In the study area it covers low-altitude mountains (200-300 m) and ravines.
It is a soft rock, probably consolidated volcanic ash, said to be extracted from a cave in a ravine by means of rasping.
The contract left the ravines and hills + a substantial and growing part of the city + for later.
