![]() It is a characteristic feature of torrents that their discharge grows rapidly to reach a maximum and subsequently drops again equally rapidly. Abrupt changes in torrent discharges usually occur during flood rains following a long wet period when the soil in the watershed no longer has sufficientcapacity to absorb the flood rain water. The variation of the discharges, that is, the ratio between the minimum and maximum discharges, may be as wide as 1:5000 or even wider. The torrent is a water-course category defined as a stream with highly variable discharges, high slope gradients of the bottom, high scouring activity, transport, and deposition of sediment and frequent changes of channel dimensions, the main criterion being the formation, transport and deposition of sediment.
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