Aspect influences on soil water retention and storage

Hydrological Processes - Tập 25 Số 25 - Trang 3836-3842 - 2011
Ivan John Geroy1, Molly M. Gribb2, Hans‐Peter Marshall3, D. G. Chandler4, S. G. Benner3, J. P. McNamara3,5,6
1United States Forest Service, Durango, CO, 81301
2Civil and Environmental Engineering Department, South Dakota School of Mines and Technology, Rapid City South Dakota, 57701
3Department of Geosciences, Boise State University, Boise, Idaho 83725;
4Currently at: Civil and Environmental Engineering Department, Syracuse University, Syracuse, NY, 13244
5*Email: [email protected]
6James McNamara, Department of Geosciences, Boise State University, Boise Idaho 83725.

Tóm tắt

AbstractMany catchment hydrologic and ecologic processes are impacted by the storage capacity of soil water, which is dictated by the profile thickness and water retention properties of soil. Soil water retention properties are primarily controlled by soil texture, which in turn varies spatially in response to microclimate‐induced differences in insolation, wetness and temperature. All of these variables can be strongly differentiated by slope aspect. In this study, we compare quantitative measures of soil water retention capacity for two opposing slopes in a semi‐arid catchment in southwest Idaho, USA. Undisturbed soil cores from north and south aspects were subjected to a progressive drainage experiment to estimate the soil water retention curve for each sample location. The relatively large sample size (35) supported statistical analysis of slope scale differences in soil water retention between opposing aspects. Soils on the north aspect retain as much as 25% more water at any given soil water pressure than samples from the south aspect slope. Soil porosity, soil organic matter and silt content were all greater on the north aspect, and each contributed to greater soil water retention. These results, along with the observation that soils on north aspect slopes tend to be deeper, indicate that north aspect slopes can store more water from the wet winter months into the dry summer in this region, an observation with potential implications on ecological function and landscape evolution. Copyright © 2011 John Wiley & Sons, Ltd.

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Tài liệu tham khảo

10.1029/2008WR007438

10.1002/(SICI)1099-1085(200001)14:1<155::AID-HYP917>3.0.CO;2-J

10.1097/00010694-194010000-00001

Dingman SL, 2002, Physical Hydrology, 646

10.2136/sssaj1993.03615995005700050001x

10.1016/S0022-1694(98)00187-5

10.1029/2006WR005804

10.2136/vzj2008.0016

10.1002/hyp.5798

10.1029/97WR02174

10.2136/vzj2008.0088

10.1016/j.geoderma.2005.05.008

Jenny H, 1941, Factors of Soil Formation, 191

10.2111/06‐077.1

10.2136/sssabookser5.1.2ed.c30

10.1029/2002WR001641

10.2136/sssaj1970.03615995003400030033x

10.1002/eco.29

Massey FJ, 1951, The Kolmogorov‐Smirnov Test for Goodness of Fit, Journal of the American Statistical Association, 46, 68, 10.1080/01621459.1951.10500769

10.1002/hyp.5869

10.1029/1999WR900210

10.1016/S0309-1708(01)00004-5

Simunek J, 2005, The HYDRUS‐1D software package for simulating the one‐dimensional movement of water, heat, and multiple solutes in variably‐saturated media, 240

SmithTJ.2010.Using Soil Moisture Trends Across Topographic Gradients To Examine Controls On Semi‐Arid Ecosystem Dynamics. M.Sc. Thesis Boise State University. p.193

Soil Survey Staff, 1999, Agricultural Handbook 436

10.1029/2008WR007474

10.1029/1998WR900065

10.5194/hess-13-1325-2009

10.1016/j.geomorph.2009.11.026

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Hydrological Processes

Tập 25 Số 25

3836-3842

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