Vertical and lateral soil moisture patterns on a Mediterranean karst hillslope

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Title:Vertical and lateral soil moisture patterns on a Mediterranean karst hillslope
Creators:
Canton, Yolanda; ycanton at ual dot es; Departamento de Agronomía, Escuela Superior de Ingeniería, Universidad de Almería, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Rodríguez-Caballero, Emilio ; e dot rodriguez-caballer at mpic dot de; Departamento de Agronomía, Escuela Superior de Ingeniería, Universidad de Almería, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Contreras, Sergio ; s dot contreras at futurewater dot es; FutureWater, Paseo Alfonso XIII, 48, 30203 Cartagena, Spain.
Villagarcia, Luis ; lvilsai at upo dot es; Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo Olavide, Sevilla, Spain.
Li , Xiao-Yan ; xyli at bnu dot edu dot cn ; College of Resources Science & Technology, Beijing Normal University, Beijing 100875.
Solé-Benet , Alberto ; albert at eeza dot csic dot es ; Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Domingo, Francisco ; poveda at eeza dot csic dot es; Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 64, 3, pp. 209-217
Uncontrolled Keywords:soil moisture, soil water content, hillslope, soil properties, runoff, Karstic, Mediterranean

Abstract

The need for a better understanding of factors controlling the variability of soil water content (θ) in space and time to adequately predict the movement of water in the soil and in the interphase soil-atmosphere is widely recognised. In this paper, we analyse how soil properties, surface cover and topography influence soil moisture (θ) over karstic lithology in a sub-humid Mediterranean mountain environment. For this analysis we have used 17 months of θ measurements with a high temporal resolution from different positions on a hillslope at the main recharge area of the Campo de Dalías aquifer, in Sierra de Gádor (Almería, SE Spain). Soil properties and surface cover vary depending on the position at the hillslope, and this variability has an important effect on θ. The higher clay content towards the lower position of the hillslope explains the increase of θ downslope at the subsurface horizon throughout the entire period studied. In the surface horizon (0–0.1 m), θ patterns coincide with those found at the subsurface horizon (0.1–0.35 m) during dry periods when the main control is also exerted by the higher percentage of clay that increases downslope and limits water depletion through evaporation. However, in wet periods, the wettest regime is found in the surface horizon at the upper position of the hillslope where plant cover, soil organic matter content, available water, unsaturated hydraulic conductivity (Kunsat) and infiltration rates are higher than in the lower positions. The presence of rock outcrops upslope the θ sampling area, acts as runoff sources, and subsurface flow generation between surface and subsurface horizons also may increase the differences between the upper and the lower positions of the hillslope during wet periods. Both rock and soil cracks and fissures act disconnecting surface water fluxes and reducing run-on to the lower position of the hillslope and thus they affect θ pattern as well as groundwater recharge. Understanding how terrain attributes, ground cover and soil factors interact for controlling θ pattern on karst hillslope is crucial to understand water fluxes in the vadose zone and dominant percolation mechanisms which also contribute to estimate groundwater recharge rates. Therefore, understanding of soil moisture dynamics provides very valuable information for designing rational strategies for the use and management of water resources, which is especially urgent in regions where groundwater supports human consume or key economic activities.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Vertical and lateral soil moisture patterns on a Mediterranean karst hillslope
Translated title:Vertical and lateral soil moisture patterns on a Mediterranean karst hillslope
Creators:
Canton, Yolanda; ycanton at ual dot es; Departamento de Agronomía, Escuela Superior de Ingeniería, Universidad de Almería, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Rodríguez-Caballero, Emilio ; e dot rodriguez-caballer at mpic dot de; Departamento de Agronomía, Escuela Superior de Ingeniería, Universidad de Almería, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Contreras, Sergio ; s dot contreras at futurewater dot es; FutureWater, Paseo Alfonso XIII, 48, 30203 Cartagena, Spain.
Villagarcia, Luis ; lvilsai at upo dot es; Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo Olavide, Sevilla, Spain.
Li , Xiao-Yan ; xyli at bnu dot edu dot cn ; College of Resources Science & Technology, Beijing Normal University, Beijing 100875.
Solé-Benet , Alberto ; albert at eeza dot csic dot es ; Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Domingo, Francisco ; poveda at eeza dot csic dot es; Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, La Cañada de San Urbano S/N, 04120 Almería, Spain.
Uncontrolled Keywords:soil moisture, soil water content, hillslope, soil properties, runoff, Karstic, Mediterranean
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:64
Number:3
Page Range:pp. 209-217
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8662
Item Type:Article
Deposited On:18 Aug 2016 14:26
Last Modified:18 Aug 2016 12:26

Citation

Canton, Yolanda; Rodríguez-Caballero, Emilio; Contreras, Sergio; Villagarcia, Luis; Li , Xiao-Yan; Solé-Benet , Alberto; Domingo, Francisco (2016) Vertical and lateral soil moisture patterns on a Mediterranean karst hillslope. Journal of Hydrology and Hydromechanics, 64 (3). pp. 209-217. ISSN 0042-790X

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