TY  - JOUR
T1  - Yarı kurak bölgelerde sentetik açıklıklı radar (mikrodalga) görüntüleri ile toprak neminin tahmini
TT  - Estimation of soil moisture by synthetic aparture radar (microwave) images in semi arid regions
AU  - Tunçay, Tülay
PY  - 2020
DA  - February
Y2  - 2020
DO  - 10.7161/omuanajas.551781
JF  - Anadolu Tarım Bilimleri Dergisi
JO  - ANAJAS
PB  - Ondokuz Mayıs University
WT  - DergiPark
SN  - 1308-8750
SP  - 8
EP  - 25
VL  - 35
IS  - 1
LA  - tr
AB  - Toprakneminin konumsal ve zamansal olarak dağılımı, kurak ve yarı kurak bölgelerdekuraklık izlemesi, ürün sulama planlaması, ürün tahmini gibi havza seviyesindekitarımsal uygulamalarda anahtar bir parametredir. Ayrıca, radar uydu görüntüleriçeşitli bölgeler için toprak ve bitki örtüsü dağılımının mekânsal ve zamansalolarak ortaya konulmasını sağlamak için kullanılmaktadır. Aktif mikrodalgasensör sistemleri kullanarak yüzey toprağı neminin tahmini araştırmacılar,koruma planlamacıları ve doğal kaynakların sürdürülebilir kullanımını izleyenkarar vericiler için yararlı bilgilerden biridir. Bu çalışma, yarı kurak iklimesahip Altınova Tarım İşletmesi arazisinde seçilen altmış dört kilometrekareliktest alanı topraklarında yürütülmüştür. Dört farklı zamanda elde edilenSentetik Açıklıklı Radar (SAR) görüntülerinin gerisaçılım değerleri(Radarsat-2) ve yüzey toprağı nemi arasındaki ilişki belirlenmeyeçalışılmıştır. Bu amaçla, Altınova Tarım İşletmesine ait dört SAR görüntüsü (4tane Radarsat-2 görüntüsü) kullanılmıştır. Eş zamanlı olarak, 730 farklınoktada 250 m aralıklarla yüzey toprak örnekleri 0-20 cm’den alınmış ve çalışmaalanı boyunca gravimetrik yöntem kullanılarak yüzey toprağının nemibelirlenmiştir. Her örnekleme periyodu için yüzey toprağı nem dağılımharitaları ordinary kriging kullanılarak üretilmiştir. Toprak nem dağılımharitalarına göre Ağustos verileri, çalışma alanı boyunca diğer örneklemedönemlerine kıyasla yüzey toprağı neminde en fazla değişiklikleri göstermiştir.Bu nedenle çalışma alanı boyunca gerisaçılma (Ağustos 2012 Radarsat-2verilerinden elde edilen) ile toprak nemi içeriği arasındaki ilişkinin diğerSAR veri sonuçlarından daha iyi olduğu bulunmuştur (r=0.506, p<0.05).
KW  - Toprak nemi
KW  - RADARSAT-2
KW  - Konumsal Değişkenlik
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UR  - https://doi.org/10.7161/omuanajas.551781
L1  - https://dergipark.org.tr/en/download/article-file/969236
ER  -