Tekirdağ İlinde CBS Tabanlı RUSLE Modeli Kullanarak Erozyon Risk Değerlendirmesi
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Tarih
2014
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Namık Kemal Üniversitesi, Ziraat Fakültesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalışmanın amacı, Coğrafi Bilgi Sistemleri (CBS) tabanlı Düzenlenmiş Evrensel Toprak Kaybı Denklemi (RUSLE) yöntemi kullanarak Tekirdağ ilinin erozyon risk sahalarının ve yıllık ortalama toprak kayıp miktarının belirlenmesi ve haritalanmasıdır. Bu amaç çerçevesinde çeşitli kaynaklardan toplanan çok farklı malzemeler yöntem içeriği doğrultusunda birleştirilmiş ve elde edilen sonuçlar arazi çalışmaları ile yerinde kontrol edilmiştir. Sonuçta Tekirdağ ilinin genelinde (% 61.9) çok hafif (Risk 1) erozyon riskinin etkili olduğu tespit edilmiştir. Erozyon daha çok eğim değerlerinin yüksek, zemin örtüsünün zayıf veya tahrip edildiği, vadi yoğunluğunun fazla ve toprak özelliklerinin ince karakterli olduğu alanlarda şiddetli olduğu görülmüştür. İlde yaşanan yıllık ortalama toprak kaybı, 5.26 t/ha-1/y-1 olarak hesaplanmıştır. Belirlenen bu toprak kaybı değeri, Türkiye ortalamasının (6.14 t/ha-1/y-1) altında olduğu için oldukça olumlu bir durumdur. Bununla birlikte ilde 32 yıllık zaman zarfında (1981-2013) çok hafif, hafif ve çok şiddetli erozyon risk sınıflarında artış, orta, güçlü ve şiddetli erozyon risk sınıflarında ise azalış şeklinde makul bir değişim yaşanmıştır. Ancak il genelinde yine de erozyonu en asgari düzeye indirmek amacıyla bazı tedbirler alınmalıdır. Bütün bu ve buna benzer önlemler alınmazsa ildeki erozyon eskiye benzer bir karakter kazanıp, artabilir. Bu çalışma CBS tekniklerinden yararlanılarak RUSLE yöntemiyle erozyon riskinin belirlenebileceğini göstermiştir.
This study aimed at determining and mapping the erosion risk zones and average annual soil loss amount in Tekirdağ province through Geographic Information Systems (GIS) based Revised Universal Soil Loss Equation (RUSLE). To this end, various materials collected from different sources were combined in accordance with the method content. The obtained results were checked in-situ via field surveys. It was concluded that there was a very soft (Risk 1) erosion risk in most of Tekirdağ province (61.9 %). It was seen that erosion was intense mostly in the areas which had high slope values, which had a poor or destroyed ground cover, and where valley density was high and soil had a fine characteristic. Average annual soil loss in the province was found to be 5.26 t/ha-1/y-1. This soil loss value was quite below the Turkey average (6.14 t/ha-1/y-1), thereby referring to a positive situation. In addition, it was determined that an increase occurred in very soft, soft, and very intense erosion risk classes while a decrease occurred in medium, strong, and intense erosion risk classes in the 32 year period (1981-2013). However, despite such positive findings, some measures should be taken across the province in order to minimize erosion. Erosion may acquire a characteristic similar to the one in the past and increase, if such measures are not taken. The present study also demonstrated that erosion risk might be determined via GIS4based RUSLE method.
This study aimed at determining and mapping the erosion risk zones and average annual soil loss amount in Tekirdağ province through Geographic Information Systems (GIS) based Revised Universal Soil Loss Equation (RUSLE). To this end, various materials collected from different sources were combined in accordance with the method content. The obtained results were checked in-situ via field surveys. It was concluded that there was a very soft (Risk 1) erosion risk in most of Tekirdağ province (61.9 %). It was seen that erosion was intense mostly in the areas which had high slope values, which had a poor or destroyed ground cover, and where valley density was high and soil had a fine characteristic. Average annual soil loss in the province was found to be 5.26 t/ha-1/y-1. This soil loss value was quite below the Turkey average (6.14 t/ha-1/y-1), thereby referring to a positive situation. In addition, it was determined that an increase occurred in very soft, soft, and very intense erosion risk classes while a decrease occurred in medium, strong, and intense erosion risk classes in the 32 year period (1981-2013). However, despite such positive findings, some measures should be taken across the province in order to minimize erosion. Erosion may acquire a characteristic similar to the one in the past and increase, if such measures are not taken. The present study also demonstrated that erosion risk might be determined via GIS4based RUSLE method.
Açıklama
Anahtar Kelimeler
Toprak, Toprak erozyonu, RUSLE (3D) yöntemi, Coğrafi Bilgi Sistemleri (CBS), Tekirdağ, Soil, Soil erosion, RUSLE (3D) Method, Geographic Information Systems (GIS)
Kaynak
Tekirdağ Ziraat Fakültesi Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
11
Sayı
3
