Spatial and short-term temporal variations in runoff,soil aggregation and other soil properties along a mediterranean climatological gradient |
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| Institution: | 1. Department of Physical Geography and soil, University of Amsterdam, Nieuwe Prinsengracht 130, 1018 VZ Amsterdam, Netherlands;2. Department of Geography, University of Valencia Avenida Blasco Ibañez 28, 46010 Valencia, Spain;1. College of Resource Science, Sichuan Agricultural University, Chengdu 611130, China;2. College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China;1. Georges Lemaître Centre for Earth and Climate Research, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium;2. Department of Environmental Sciences, University of Basel, 4056 Basel, Switzerland;3. Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas (EEAD-CSIC), 1005 Avda. Montañana, Zaragoza, Spain;1. Postgraduate Program in Agroecology of Maranhão State University (UEMA), Brazil;2. Federal Institute of Maranhão (IFMA), Campus São Raimundo das Mangabeiras, Brazil;1. Dept. of Civil and Environmental Engineering, University of Perugia, via G. Duranti 93, 06125 Perugia, Italy;2. Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, United States;1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, China;2. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, Shaanxi 710061, China;3. CAS Center for Excellence in Quaternary Science and Global Change, Xian 710061, China;4. National Observation and Research Station of Earth Critical Zone and Terrestrial Surface Flux on the Loess Plateau, Xi’an, Shaanxi 710061, China;5. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Physical and chemical soil properties were measured along a mountainous climatological gradient in the province of Alicante (Spain). The objective was to evaluate how the climate affects certain soil properties at different temporal and spatial scales. These properties include infiltration, runoff and sediment concentrations resulting from rainfall simulation experiments performed in winter and in summer. Chemical soil properties like carbonate content, organic matter content and CEC were analysed in reference soil profiles along the gradient. Physical soil properties like soil moisture content, macroaggregation and waterstable microaggregation were measured at monthly intervals during a year. The comparison of the results was done at different spatial (site, slope and patch) and temporal (monthly and seasonal) scales by means of some statistical tests. It can be concluded that there are some soil properties positively related to the gradient, like organic matter, clay content and CEC which increase with the annual rainfall. However, runoff coefficients and erosion are higher when the climatic annual rainfall. However, runoff coefficients and erosion are higher when the climatic conditions become more arid. Aggregation and infiltration capacity are higher on north-facing slopes and in vegetated patches than in south-facing slopes and in bare patches. |
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