Spatial and short-term temporal variations in runoff, soil aggregation and other soil properties along a mediterranean climatological gradient
نویسندگان
چکیده
Physical and chemical soil properties were measured along a mountainous climatological Ž . 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 Ž intervals during a year. The comparison of the results was done at different spatial site, slope and . Ž . 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. q 1998 Elsevier Science B.V. All rights reserved.
منابع مشابه
Temporal Variation Pattern of Runoff Generation and Rill Erosion in Different Soils and Slope Gradients
This study was conducted to investigate the temporal variations of runoff and rill erosion in various soil textures under different slope gradients. So, a laboratory experiment was set up in three soil textures (loam, clay loam, and sandy clay loam) and four slope gradients (5, 10, 15, and 20%) using the completely randomized design with three replications. Runoff production and rill erosion we...
متن کاملتغییرپذیری فرسایش سطحی و دانهبندی ذرات خاک نسبت به جهت و درجه شیب دامنه در منطقه نیمهخشک در غرب زنجان
Soil erosion by surface runoff introduced as surface erosion is one of the main mechanisms of land degradation in the hill slopes. Slope characteristics including aspect and gradient can control the differences of soil properties along the hillslope. This study was conducted to investigate the effect of slope aspect and gradient on variations of some soil properties in the short slopes. Five hi...
متن کاملThe erosional response of calcareous soils along a climatological gradient in Southeast Spain
The erosional response of calcareous soils along a climatological gradient in Alicante, SE Spain was studied. The erosional response was defined in terms of indicators obtained from field rainfall simulation experiments and laboratory studies of soil aggregation. Measurements were made at seven sites on limestones and marls between Benidorm with an y1 Ž y1. annual average rainfall of 400 mm yr ...
متن کاملSoil Co2 Efflux and Its Spatial and Temporal Variations in a Mediterranean Pinus Sylvestris L. Forest in Central Spain
INCLÁN, R., GRAU, J. M., DANIEL DE LA TORRE , LOPEZ, M.: Soil CO2 efflux and its spatial and temporal variations in a Mediterranean Pinus sylvestris L. forest in central Spain. Lesn. Čas. – Forestry Journal, 52(1–2): 3–7, 2006, 1 fig., tab. 1, ref. 11. Original paper. ISSN 0323–1046 The main factors influencing spatial and temporal variations in soil respiration were investigated in 5 sampling ...
متن کاملTemporal Variations of Fire Effects on Dissolved Nutrient Concentrations and Runoff amount in Zrebar Lake Watershed
Fire causes destructive effects on soil, water and components of wetland ecosystems. The aim of this study was to investigate the effects of fire on runoff amount and nutrient concentration of Zrebar Lake watershed between 2014 and 2017 and the return of burned areas to their natural conditions in the short, medium and long term. The results showed that in the fourth year after the fire, the am...
متن کامل