SOIL Studies

SOIL Studies

2016, Vol 5, Num, 1     (Pages: 008-015)

Determination of Spatial Distribution Pattern of Soil Erodibility Factor Using Different Interpolation Models in Çorum-Alaca Watershed

Ali İMAMOĞLU 1 ,Muhammed BAHADIR 1 ,Orhan DENGİZ 2

1 Ondokuz Mayıs Üniversitesi, Fen Edebiyat Fakültesi, Coğrafya Bölümü, Samsun
2 Ondokuz Mayıs Üniversitesi, Ziraat Fakültesi, Toprak Bilimi ve Bitki Besleme Bölümü, Samsun

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Soil erosion is one of the most important soil degradation problems almost in all parts of Turkey. Undesirable climate and topographic conditions as well as in appropriate land uses cause severe erosion that reduces soil productivity by removing fertile topsoil layers. The objective of this research was to determine and map spatial distribution of soil erodibility using different interpolation models. This research was carried out in Çorum Alaca watershed located at north part of the Central Kızılırmak Region in the Central Anatolia. Total study area covers about 1656.4 km2 with different topographic features and the altitude changes from 825 m to 1726 m. In total 312 surface soil samples from 0-20 cm depth were collected at the intersections of a 2.5 x 2.5 km grid system. Some physicochemical properties were determined and soil erodibility factor was calculated. Soil erodibility distribution map was produced using the best fit geoistatistik model for erodibility values of each selected sampling point. The results indicated that 57.8% of the study area has low erodobility and 42.1% moderate erodobility.

Keywords : Çorum-Alaca watershed, K-factor, jeostatistic, soil erodibility