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Çankırı Karatekin Üniversitesi (2018)

Hillslope hydropedology in semi-arid Central Anatolian conditions (Cankiri)

SÜNAL Seval

Titre : Hillslope hydropedology in semi-arid Central Anatolian conditions (Cankiri)

Yarı-kurak Orta Anadolu koşullarında (Çankırı) tepe-eğim hidropedolojisi

Auteur : SÜNAL Seval

Université de soutenance : Çankırı Karatekin Üniversitesi

Grade : Doktora Tezi 2018

Résumé
In semi-arid regions, the hydrologic and hydropedologic processes should be understood well for a successful water and soil management. Field scale hydropedology is a relatively new subject, comprising several processes such as transport and translocation in soils, water flow and storage in landscapes, soil-formation water relations, and interaction between soil and water. The hydropedelopy of hillslope and depression areas is highly intricate. Research is needed to understand the processes behind hydropedelogy to manage soil and water successfully in landscapes, especially dryland areas. There are two main factors making the study of hydropedology difficult : 1) spatial and temporal variation of the processes governing the hydropedology and 2) inadequacy of the available literatüre in order to understand these process. Some studies have already been conducted on hydropedology in various climate, topography, soil and scales. However, research is still needed to generalize the results to different conditions. In this study, hydropedology of undulating hills, located gypsum and lime deposits, in a semi-arid landscape was investigated. In this regard, spatial structure of soil processes such as infiltration rate, hydraulic conductivity, soil morphologic and parametric processes were studied and interactions among these attributes were evaluated. Soil profiles were opened on different hillslope positions and at different slope aspects. Soil profiles were described and soil samples were taken from each horizon and basic soil properties were analyzed. Infiltration rate was measured at five points next to each profile and saturated hydraulic conductivity (Ks) measured at each horizon at five points around profile. The data was analyzed for determining surface and subsurface flow paths and factors controlling the characteristics of these paths. The spatial structure of attributes was evaluated by semivariograms and their surface maps build. Relations between slope properties and hydropedologic processes had analyzed by ANOVA test and means were discriminated by LSD technique. All the statistical analysis had conducted based on an alternative hypothesis at significance level of 0.05. However, factor analysis was done to evaluate all aspects of the variables were obtained by converting to a simpler form more easily, and to reveal the relationships among multiple comparison tests and soil characteristics

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