ABSTRACT
Water is of vital importance to the denudational processes of the humid landscape. Not only does it take part in the weathering of rock, but it also forms one of the main methods of transporting weathered material. The cyclic movement of weathered material has already been considered briefly. Water also moves in a cycle, although the time taken to complete the cycle is likely to be measured in weeks rather than millions of years. Water enters the landscape as precipitation. It may then enter soil, plants or rock, but it eventually leaves the landscape by one of two routes. It may either form runoff and so make its way back to the ocean, or it may be passed directly back to the atmosphere as water vapour due to evaporation from standing water or transpiration from the leaves of plants which have drawn water from the soil.
