Development of tree volume equations for Cedar stands in Adana-Kozan region

Fadime Sağlam

Makale detayları

Development of tree volume equations for Cedar stands in Adana-Kozan region

Yazarlar:

Fadime Sağlam

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Biyometrisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338783

pISSN:

1309-856X

Anahtar kelimeler:

Özet:

 Background and Aims This study aims to develop tree volume equations for cedar stands in the Adana-Kozan region. Methods In this context, a total of 11 different models, including single-entry and double-entry models, were developed using data obtained from 105 sample trees. The models were evaluated based on statistical criteria, including the coefficient of determination R², mean error ME, mean absolute error MAE, root mean square error RMSE, mean absolute percent error MAPE, and total percent error TPE to determine the most suitable models. Results As a result of these evaluations, Model 4 R20.958 was identified as the most successful among the single-entry models, while Model 6 R20.989 was determined to be the best-performing double-entry model. It was observed that double-entry models generally exhibited higher R² values and lower error statistics. Furthermore, a comparison of the developed double-entry models with previous studies revealed that Model 6 had lower prediction errors. The findings indicate that double-entry models provide more reliable estimates for predicting the volume of cedar trees. However, in practical applications where cost and time constraints are critical, single-entry models may also be preferred. Conclusions This study provide accurate volume estimation equations for cedar stands in the Adana-Kozan region, contributing to regional forestry management.

 Background and Aims This study aims to develop tree volume equations for cedar stands in the Adana-Kozan region. Methods In this context, a total of 11 different models, including single-entry and double-entry models, were developed using data obtained from 105 sample trees. The models were evaluated based on statistical criteria, including the coefficient of determination R², mean error ME, mean absolute error MAE, root mean square error RMSE, mean absolute percent error MAPE, and total percent error TPE to determine the most suitable models. Results As a result of these evaluations, Model 4 R20.958 was identified as the most successful among the single-entry models, while Model 6 R20.989 was determined to be the best-performing double-entry model. It was observed that double-entry models generally exhibited higher R² values and lower error statistics. Furthermore, a comparison of the developed double-entry models with previous studies revealed that Model 6 had lower prediction errors. The findings indicate that double-entry models provide more reliable estimates for predicting the volume of cedar trees. However, in practical applications where cost and time constraints are critical, single-entry models may also be preferred. Conclusions This study provide accurate volume estimation equations for cedar stands in the Adana-Kozan region, contributing to regional forestry management.

 Background and Aims This study aims to develop tree volume equations for cedar stands in the Adana-Kozan region. Methods In this context, a total of 11 different models, including single-entry and double-entry models, were developed using data obtained from 105 sample trees. The models were evaluated based on statistical criteria, including the coefficient of determination R², mean error ME, mean absolute error MAE, root mean square error RMSE, mean absolute percent error MAPE, and total percent error TPE to determine the most suitable models. Results As a result of these evaluations, Model 4 R20.958 was identified as the most successful among the single-entry models, while Model 6 R20.989 was determined to be the best-performing double-entry model. It was observed that double-entry models generally exhibited higher R² values and lower error statistics. Furthermore, a comparison of the developed double-entry models with previous studies revealed that Model 6 had lower prediction errors. The findings indicate that double-entry models provide more reliable estimates for predicting the volume of cedar trees. However, in practical applications where cost and time constraints are critical, single-entry models may also be preferred. Conclusions This study provide accurate volume estimation equations for cedar stands in the Adana-Kozan region, contributing to regional forestry management.

 Giriş ve Hedefler Bu çalışma, Adana-Kozan yöresinde bulunan sedir meşcereleri için ağaç hacim denklemlerinin geliştirilmesini amaçlamaktadır. Yöntem Çalışma kapsamında, 105 örnek ağaçtan elde edilen veriler kullanılarak 4 adet tek girişli ve 7 adet çift girişli olmak üzere toplam 11 adet ağaç hacim denklemi geliştirilmiştir. Modellerin başarıları; belirtme katsayısı R2, ortalama hata OH, ortalama mutlak hata OMH, hata kareler ortalamasının karekökü HKOK, ortalama mutlak hata yüzdesi OMHY ve toplam hata yüzdesi THY kullanılarak değerlendirilmiş ve en uygun modeller belirlenmiştir. Bulgular Yapılan değerlendirmeler sonucunda, tek girişli denklemlerden Model 4ün R20,958, çift girişli denklemlerden ise Model 6nın R20,989 en başarılı tahminleri sunduğu ortaya konulmuştur. Geliştirilen denklemlerden çift girişli denklemlerin genel olarak daha yüksek R2 değerine ve daha düşük hata istatistiklerine sahip olduğu gözlemlenmiştir. Ayrıca, geliştirilen çift girişli ağaç hacim denkleminden elde edilen tahminlerle literatürde yer alan mevcut çalışmalarla elde edilen tahminlerin karşılaştırılması sonucunda, Model 6nın daha düşük tahmin hatalarına sahip olduğu görülmüştür. Elde edilen bulgular, çift girişli modellerin sedir ağaçlarının hacmini tahmin etmede daha güvenilir sonuçlar verdiğini göstermiştir. Bununla birlikte, maliyet ve zaman açısından kısıtlamaların bulunduğu uygulamalarda tek girişli modellerin de tercih edilebileceği sonucuna varılmıştır. Sonuçlar Bu çalışma sonucunda elde edilen tek ve çift girişli denklemler, Adana-Kozan yöresi sedir meşcereleri için güvenilir gövde hacim tahminlerine olanak sağlayacak ve böylece ilgili yörede gerçekleştirilecek ormancılık faaliyetlerine olumlu katkılar sunacaktır.

Makale detayları

Development of tree volume equations for Cedar stands in Adana-Kozan region

Yazarlar:

Fadime Sağlam

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Biyometrisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338783

pISSN:

1309-856X

Stem volume

tree volume tables

Cedrus libani

Eastern MediterraneanGövde hacmi

ağaç hacim tabloları

Cedrus libani

Doğu Akdeniz

Sayı

Makale detayları

Yazarlar: Fadime Sağlam

Yayıncı: Cankiri Karatekin University

Ana Başlıklar: Orman Biyometrisi

Dergi: Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.121-128

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: Türkçe

Document ID (Org No.): 2001338783

pISSN: 1309-856X

Sayı

Yazarlar:

Fadime Sağlam

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Biyometrisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.11 Issue 1, pp.121-128

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

Türkçe

Document ID (Org No.):

2001338783

pISSN:

1309-856X