Subsurface storm flow formation at different hillslopes and implications for the ?old water paradox? Export

@article{citeulike:2007375, abstract = {Although many studies over the past several decades have documented the importance of subsurface stormflow (SSF) in hillslopes, its formation is still not well understood. Therefore, we studied SSF formation in the vadose soil zone at four different hillslopes during controlled sprinkling experiments and natural rainfall events. Event and pre-event water fractions were determined using artificially traced sprinkling water and 222Rn as natural tracer. SSF formation and the fraction of pre-event water varied substantially at different hillslopes. Both intensity of SSF and fraction of pre-event water depended on whether SSF in preferential flow paths was fed directly from precipitation or was fed indirectly from saturated parts of the soil. Soil water was rapidly mobilized from saturated patches in the soil matrix and was subsequently released into larger pores, where it mixed with event water. Substantial amounts of pre-event water, therefore, were contained in fast flow components like subsurface storm flow and also in overland flow. This finding has consequences for commonly used hydrograph separation methods and might explain part of the ?old water paradox?. Copyright {\copyright} 2007 John Wiley \& Sons, Ltd.}, address = {Institute of Environmental Engineering, ETH Zurich, Zurich, Switzerland}, author = {Kienzler, Peter M. and Naef, Felix}, citeulike-article-id = {2007375}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/hyp.6687}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/114201963/ABSTRACT}, doi = {10.1002/hyp.6687}, journal = {Hydrological Processes}, keywords = {hillslope, hydrology, macropores, old-new-water}, number = {9999}, pages = {n/a+}, posted-at = {2007-11-28 20:46:54}, priority = {5}, title = {Subsurface storm flow formation at different hillslopes and implications for the ?old water paradox?}, url = {http://dx.doi.org/10.1002/hyp.6687}, volume = {9999}, year = {2007} }

TY - JOUR ID - citeulike:2007375 L3 - citeulike-article-id:2007375 N2 - Although many studies over the past several decades have documented the importance of subsurface stormflow (SSF) in hillslopes, its formation is still not well understood. Therefore, we studied SSF formation in the vadose soil zone at four different hillslopes during controlled sprinkling experiments and natural rainfall events. Event and pre-event water fractions were determined using artificially traced sprinkling water and 222Rn as natural tracer. SSF formation and the fraction of pre-event water varied substantially at different hillslopes. Both intensity of SSF and fraction of pre-event water depended on whether SSF in preferential flow paths was fed directly from precipitation or was fed indirectly from saturated parts of the soil. Soil water was rapidly mobilized from saturated patches in the soil matrix and was subsequently released into larger pores, where it mixed with event water. Substantial amounts of pre-event water, therefore, were contained in fast flow components like subsurface storm flow and also in overland flow. This finding has consequences for commonly used hydrograph separation methods and might explain part of the ?old water paradox?. Copyright © 2007 John Wiley & Sons, Ltd. IS - 9999 JF - Hydrological Processes AD - Institute of Environmental Engineering, ETH Zurich, Zurich, Switzerland TI - Subsurface storm flow formation at different hillslopes and implications for the ?old water paradox? VL - 9999 SP - n/a KW - hillslope KW - hydrology KW - macropores KW - old-new-water AU - Kienzler, Peter AU - Naef, Felix PY - 2007/// UR - http://dx.doi.org/10.1002/hyp.6687 ER -