HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Needelman, B. A. Articles by Kleinman, P. J. A. Search for Related Content PubMed Articles by Needelman, B. A. Articles by Kleinman, P. J. A. GeoRef GeoRef Citation Agricola Articles by Needelman, B. A. Articles by Kleinman, P. J. A. Related Collections Watershed and Landscape Processes Runoff Surface Hydrology Nutrient Management

DIVISION S-6—SOIL & WATER MANAGEMENT & CONSERVATION

Surface Runoff along Two Agricultural Hillslopes with Contrasting Soils

^a Dep. of Natural Resource Sci. and Landscape Architecture, Univ. of Maryland, 1112 H.J. Patterson Hall, College Park, MD 20742
^b Pasture Systems and Watershed Management Research Unit, USDA-ARS, Curtin Rd., University Park, PA 16802
^c Dep. of Crop and Soil Sci., The Pennsylvania State Univ., 116 A.S.I. Building, University Park, PA 16802

^* Corresponding author (bneed{at}umd.edu).

The targeting of critical surface runoff-producing zones should account for the influence of subsurface soil characteristics. In this study we assessed the runoff response of contrasting colluvial and residual soils. The study was conducted along two hillslopes within a 39.5-ha mixed land use watershed in Pennsylvania. Six sites (four colluvial, two residual) were monitored for runoff, hydraulic head, water table depth, and soil water content. A total of 111 rainfall events were monitored during the periods of July to December 2000, April to December 2001, and April to December 2002. Two high-intensity (5-min peak > 8 cm h^–1) events had return periods of 2.5 and 4 yr. The colluvial soils are somewhat poorly and moderately well drained with fragipans and high clay content (37–44%) argillic horizons (fine, mixed, semiactive, mesic Aquic Fragiudalfs); the residual soils are well drained with moderate clay content (24%) argillic horizons (fine-loamy, mixed, semiactive, mesic Typic Hapludults). Across all events, overall runoff yields averaged 2.4% from the four colluvial sites and 0.01% from the two residual sites. The two colluvial sites with the greatest runoff production were located at the base of a primarily colluvial hillslope. The largest events at these sites occurred during periods of surface saturation (soil surface to a depth of at least 30 cm). These results suggest that nonwinter P management for these residual soils should focus on rare, large events. Nutrient management planning could be improved if runoff estimation methods were to better integrate information on subsurface and upslope soil hydrologic properties.

Abbreviations: VSA, variable source area

This article has been cited by other articles:

				A. N. Sharpley, P. J. A. Kleinman, A. L. Heathwaite, W. J. Gburek, J. L. Weld, and G. J. Folmar Integrating Contributing Areas and Indexing Phosphorus Loss from Agricultural Watersheds J. Environ. Qual., June 23, 2008; 37(4): 1488 - 1496. [Abstract] [Full Text] [PDF]

				A. N. Sharpley, P. J. A. Kleinman, A. L. Heathwaite, W. J. Gburek, G. J. Folmar, and J. P. Schmidt Phosphorus Loss from an Agricultural Watershed as a Function of Storm Size J. Environ. Qual., March 1, 2008; 37(2): 362 - 368. [Abstract] [Full Text] [PDF]

				R. W. McDowell Phosphorus and sediment loss in a catchment with winter forage grazing of cropland by dairy cattle. J. Environ. Qual., March 1, 2006; 35(2): 575 - 583. [Abstract] [Full Text] [PDF]