Journal article
Stormflow generation in forest headwater catchments: A hydrogeomorphic approach
Forest Snow and Landscape Research, Vol.80(1), pp.115-128
2006
Abstract
During the past few decades, different paradigms have emerged to describe the processes of stormflow generation in steep, forested headwater catchments. A hydrogeomorphic model has recently been developed, based on studies in Japan, to explain stormflow response. This conceptual model recognizes the close coupling of hillslope and channel hydrological processes and the unique contributions of geomorphic features in the catchment. The model can be used to assess the effects of various forest management practices, including protection forests, on stormflow generation. For the driest conditions, catchment water yield is very low and runoff occurs as saturated overland flow from the small riparian zone and via direct channel interception. For slightly wetter conditions, subsurface flow from the soil matrix augments stormflow. As wetness increases, two significant non-linear hydrologic responses occur: 1) a threshold response in geomorphic hollows (zero-order basins) where runoff initiates after an accumulation of shallow groundwater; and 2) self-organization and expansion of preferential flow pathways, which facilitate subsurface drainage. Increases in stormflow during periods of increasing antecedent wetness depend upon temporal and spatial linkages, and the unique hydrologic behavior of three components: riparian corridors, linear hillslopes and geomorphic hollows. These linkages form the basis of the hydrogeomorphic concept of stormflow generation.
Details
- Title
- Stormflow generation in forest headwater catchments: A hydrogeomorphic approach
- Authors
- Roy C Sidle (Author) - Kyoto University
- Publication details
- Forest Snow and Landscape Research, Vol.80(1), pp.115-128
- Publisher
- Eidgenoessische Forschungsanstalt fuer Wald, Schnee und Landschaft
- Date published
- 2006
- ISSN
- 1424-5108
- Organisation Unit
- University of the Sunshine Coast, Queensland; Sustainability Research Cluster
- Language
- English
- Record Identifier
- 99449250802621
- Output Type
- Journal article
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