Journal ArticleDOI
Storm runoff processes and subcatchment characteristics in a new zealand hill country catchment
Colin H. Taylor,Andrew J. Pearce +1 more
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The quickflow responses of six subcatchment areas in a small hill country catchment in the Craigieburn Range, South Island, New Zealand, were compared for a range of storm sizes, rainfall intensities and antecedent wetness conditions as discussed by the authors.Abstract:
The quickflow responses of six subcatchment areas in a small hill country catchment in the Craigieburn Range, South Island, New Zealand, were compared for a range of storm sizes, rainfall intensities and antecedent wetness conditions. Topography and soil characteristics suggested that all subcatchments would receive subsurface stormflow input, but that some would receive larger saturation overland flow inputs than others. Quickflow yields and response ratios were positively correlated with storm size and antecedent wetness conditions in the subcatchment most suited to producing saturation overland flow. In subcatchments more likely to be dominated by subsurface flow, quickflow yields and response ratios were positively correlated with storm size, but were either not correlated, or negatively correlated, with antecedent wetness. Quickflow responses were either not significantly or negatively correlated with rainfall intensity variables. Quickflow from the subcatchment most suited to produce saturation overland flow providing an increasing proportion of total catchment quickflow in larger storms and as antecedent conditions became wetter. Subcatchment responses varied greatly in space and time and there was less pattern to the variation than had been expected. Where topographic and pedologic conditions permit substantial responses to storm rainfall by both saturation overland flow and subsurface stormflow, simple topographic and soil indicators may not be useful guides to the relative importance of runoff mechanisms, or to the identification of runoff-source areas.read more
Citations
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The role of event water, a rapid shallow flow component, and catchment size in summer stormflow
TL;DR: In this paper, seven nested headwater catchments (8 to 161 ha) were monitored during five summer rain events to evaluate storm runoff components and the effect of catchment size on water sources.
Journal ArticleDOI
Progress in the understanding of runoff generation dynamics in forests
TL;DR: In this paper, a survey of the delivery mechanisms of hillslope runoff and the difficulties of incorporating some of them in recent physically-based models is considered, and the research challenge in reconciling the results from recent stream hydrogeochemistry studies with the results of previous hilllope hydrometric experiments is also highlighted.
Journal ArticleDOI
Forest and Floods: Moving to an Evidence-based Approach to Watershed and Integrated Flood Management
Ian R. Calder,Bruce Aylward +1 more
TL;DR: In this paper, the authors argue that there is a growing disparity between public perception and scientific evidence relating to the causes of floods, their impacts, and the benefits of mitigation measures and suggest that this disparity has arisen through the extensive promotion of certain land uses and engineering interventions by vested interest groups in the absence of any effective dissemination of the scientific evidence which may allow a contrary view.
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Water-resource and land-use issues
TL;DR: The authors reviewed perceived notions of the relationships between catchment land use and hydrology and explored whether much of the widely disseminated folklore, so often inextricably linked with issues of land use, is based on myth or reality.
References
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Journal ArticleDOI
Partial Area Contributions to Storm Runoff in a Small New England Watershed
Thomas Dunne,Richard D. Black +1 more
TL;DR: In this paper, the Sleepers River experimental watershed was studied and the authors found that the major portion of storm runoff was produced as overland flow on a small proportion of the watershed.
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Streamflow generation in a forested watershed, New Zealand
TL;DR: In this article, a 0.3028-ha watershed has been monitored to monitor streamflow and subsurface flow through the soil mantle at a variety of topographic locations.
Journal ArticleDOI
Moisture and energy conditions within a sloping soil mass during drainage
John D. Hewlett,Alden R. Hibbert +1 more
TL;DR: In this paper, a 3×3× 45-foot inclining concrete trough was constructed on a 40 per cent slope, which was packed with a natural sandy-loam soil to a bulk density of 1.3, and after thorough soaking was covered with plastic to prevent evaporation.
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Water flux in soil and subsoil on a steep forested slope
TL;DR: In this paper, the authors evaluated water flux in soil and subsoil on a steep forested slope and found that very slight changes in soilwater pressure head during storms effected relatively large changes in both magnitude and direction of water flux.