Batı Hodna havzasında arazi kullanım değişiminin ve kum taşınımının değerlendirilmesi (Merkez Cezayir bozkır ekosistemleri)

Yıl 2019, Cilt: 69 Sayı: 2, 87 - 96, 01.07.2019

Saifi Merdas Nouar Boulghobra Tewfik Mostephaoui Mohamed Belhamra Haroun Fadlaoui

Öz

DOI: 10.26650/forestist.2019.19005

Arazi kullanımı ve arazi örtüsünün değişimi
(LULC) teknikleri ile çevre durumunun tespit edilmesi uygun bir yöntem olmakla
birlikte maliyeti de düşüktür. Bu çalışma, Hodna Havzası’nın (Mila il eyaleti,
Cezayir) batı kısmında gerçekleştirilmiştir. Bu çalışmada, 1984-2014 yılları
arasındaki 30 yıllık uzaktan algılama verileri ve arazi gözlemleri
birleştirilerek, arazi kullanımı ve arazi örtüsünün değişimleri (LULC) analiz
edilmiştir. Ayrıca, rüzgâr verileri kullanılarak kum taşınımı durumu da
değerlendirilmiştir. Görüntü sınıflandırma yöntemini kullanarak LULC tekniği
ile birlikte değerlendirmeler yapılmıştır. Elde edilen sonuçlara göre mera
alanlarının 50000 hektar ile önemli bir düşüş yaşadığını göstermiştir. Mera
alanlarındaki bu azalmanın çıplak toprak örtüsündeki 57000 hektarlık artış ile
ilişkili olduğu görülmüştür. Ayrıca, odunsu bitki örtüsü ile kaplı alanlarda
bir azalma ve tarım alanlarında da bir artış gerçekleşmiştir. Kum ile kaplı
alanların incelenmesi ve rüzgar verilerinin değerlendirilmesi ile çalışma alanı
içerisinde hareketli kumların bir geçiş bölgesi bulunduğu ortaya koyulmuştur.
Arazi kullanımı ve arazi örtüsünün değişimlerinin (LULC) çoğunlukla
antropojenik ve aşırı otlatma faktörlerinden kaynaklandığı görülmektedir. Bu
arazi etki faktörleri, arazideki farklı tipteki arazi örtüsü modellerinde de
önemli rol oynamaktadır. Çevresel durumun değerlendirilmesinde kullanılan LULC
tekniğinin, ekosistem değerlerinde azalma eğilimi olduğunu ve sürdürülebilir
yönetim uygulamalarına duyulan ihtiyacı ortaya koyan bir arazi bozulma sürecini
tanımladığı sonucuna varılmıştır.

Cite this paper as: Merdas, S., Boulghobra, N., Mostephaoui, T., Belhamra, M., Fadloui, H., 2019. Assessing land use change and moving sand transport in the western Hodna basin (central Algerian steppe ecosystems). Forestist 69(2): 87-96.

Anahtar Kelimeler

Arazi etki faktörleri, arazi kullanımı, arazi örtüsü, kum taşınımı

Assessing land use change and moving sand transport in the western Hodna basin (central Algerian steppe ecosystems)

Öz

DOI: 10.26650/forestist.2019.19005

The application of land use and land cover
change (LULC) techniques for identifying the state of the environment is both a
suitable tool and cost-effective. The study was conducted in the western part
of the Hodna Basin (province of M’sila, Algeria). In this study, we combined
remotely sensed data and ground truth observations to analyze the trends of
LULC and their drivers during the 30 years from 1984 to 2014. In addition, we
evaluated the sand transport using wind data. We assessed LULC using the
supervised image classification method. The results indicated that rangelands experienced
a considerable decrease with 50,000 hectares. This shrinkage in rangelands
cover is associated with an expansion in bare soil cover with an increase of
57,000 hectares. Furthermore, woody vegetation and sand experienced a decrease
in their cover. However, there is an increase in agriculture area. The analysis
of land cover of sand indicated a decrease in the area of this class, and the
assessment of wind data revealed that within the study area there is a
transition zone of moving sands. The dynamic of LULC was mostly conducted by
the anthropogenic and overgrazing factors. These drivers have a considerable
role in the patterning of different types of land cover in the investigated
landscape. We can conclude that the LULC technique used for the assessment of
the environmental state identified a regressive trend of ecosystem values and a
process of land degradation which implies the need for implementation of
sustainable management practices.

Cite this paper as: Merdas, S., Boulghobra,
N., Mostephaoui, T., Belhamra, M., Fadloui, H., 2019. Assessing land use change
and moving sand transport in the western Hodna basin (central Algerian steppe
ecosystems). Forestist 69(2): 87-96.

Anahtar Kelimeler

Drivers, land use/ land cover, sand transport

Kaynakça

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