Estimation of Soil Losses in a Slope Area of Tokat Province through USLE and WEPP Model

Tokat is one of the developing provinces in terms of urbanism. Therefore, the land use changes city-wide which closely affects soil erosion. Numerical estimation of soil erosion is very important to prevent soil losses. In this study, USLE and WEPP Hillslope model were used to estimate the long-term soil losses in a slope area which used to be a pasture land and then turned into a fruit orchard in Büyükbeybağı area of Tokat province. Erosion sensitivity of the soil in the slope area was detected to be very low. Erosivity value of the area is low, soil is resistant to erosion due to pasture land use type and fruit orchard use type does not require intense soil cultivation practices. For all these reasons, both estimation technologies estimated soil losses of the land to be low.

Tokat İlin’de Bir Yamaç Arazide Toprak Kayıplarının USLE ve WEPP Model ile Tahmin Edilmesi

Tokat, şehircilik bakımından gelişmekte olan illerden birisidir. Bundan dolayı il genelinde arazi kullanımı değişmekte ve bu durum toprak erozyonunu çok yakından etkilemektedir. Toprak erozyon miktarının sayısal olarak tahmin edilmesi, toprak kayıplarının engellenmesinde çok önemlidir. Bu çalışmada, Tokat ili Büyükbeybağı mevkiinde yer alan önceden mera arazi kullanım türünde olup, daha sonra meyve bahçesine dönüştürülmüş bir yamaç arazide meydana gelen, uzun yıllık toprak kayıpları USLE ve WEPP Hillslope modeli ile tahmin edilmiştir. Yamaç arazisinde yer alan toprakların aşınıma duyarlılığı oldukça düşük olarak belirlenmiştir. Yörenin erosivite değerinin düşük, mera kullanım türünden dolayı toprakların erozyona dayanıklı olması ve meyve bahçesi kullanım türünün yoğun toprak işleme uygulamalarını gerektirmemesine bağlı olarak, her iki tahmin teknolojisi de arazinin toprak kayıplarını düşük olarak tahmin etmiştir.

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