Determination of interception in conifers in a plantation forest located in semiarid environment

Year 2025, Volume: 26 Issue: 3, 233 - 241, 30.09.2025

Ahmet Şendağlı , Hüseyin Şensoy

Abstract

Throughfall, stemflow and water yield through interception are the decisive factors on the amount of rainfall reaching the soil. These elements are important components in the hydrological cycle. Interception, throughfall, and stemflow were investigated in two different species of coniferous trees in a plantation forest located in a geographical setting dominated by semiarid climate conditions in this study. A total of 210,25 mm of precipitation was recorded in the open area during the study period. A total of 24 representative trees belonging to the black pine and cedar species were determined and the throughfall, stemflow, and interception ratios were determined based on the amount of precipitation raining in the open area. While the throughfall, stemflow and interception ratio were 52,04%, 0,32% and 47,64% in black pine, they were 49,95%, 0,56% and 49,49% in cedar, respectively. Throughfall and stemflow values did not differ between black pine and cedar species (p>0,05). The results show that interception occurs at a considerably high rate for both species, relative to the amount of precipitation raining in the open area. It is predicted that meteorological factors, especially high temperature, and sparse rainfall are more effective in the high rate of interception than the morphological characteristics of the species.

Keywords

Stemflow , Interception ratio , Black pine , Throughfall , Cedar

Yarı kurak çevrede yer alan bir plantasyon ormanında iğne yapraklı türlerde intersepsiyonun belirlenmesi

Abstract

Orman altı yağış, gövdeden akış ve intersepsiyonla kaybedilen su, yağışın toprağa ulaşan miktarı üzerinde belirleyici öğelerdir. Bu öğeler hidrolojik döngü içinde önemli yer tutan bileşenlerdir. Bu çalışmada yarı kurak iklim koşullarının egemen olduğu coğrafi koşullarda bulunan bir plantasyon ormanında iğne yapraklı iki farklı tür üzerinde intersepsiyon, orman altı yağış ve gövdeden akış bileşenleri araştırılmıştır. Çalışma süresi içinde açık alanda toplam 210,25 mm yağış kaydedilmiştir. Karaçam ve sedir türlerinde toplam 24 örnek ağaç belirlenmiş ve açık alana düşen yağış miktarı esas alınarak orman altı yağış, gövdeden akış ve intersepsiyon oranları belirlenmiştir. Orman altı yağış, gövdeden akış ve intersepsiyon kaybı oranları karaçamda sırasıyla %52,04, %0,32 ve %47,64 olurken; sedirde %49,95, %0,56 ve %49,49 şeklinde gerçekleşmiştir. Orman altı yağış ve gövdeden akış değerleri, karaçam ve sedir türleri arasında farklılık oluşturmamıştır (p>0,05). Elde edilen sonuçlar, açık alana düşen yağış miktarı dikkate alındığında, intersepsiyon oranının her iki tür için de oldukça yüksek olduğunu ortaya koymaktadır. İntersepsiyon oranının yüksek olmasında, türlerin yapısal niteliklerinden çok, meteorolojik faktörlerin; özellikle yüksek sıcaklık ve seyrek yağmur yağışının etkili olduğu tahmin edilmektedir.

Keywords

Gövdeden akış , İntersepsiyon oranı , Karaçam , Orman altı yağış , Sedir

Thanks

Bu çalışmanın gerçekleştirildiği Türkiye Milli Botanik Bahçesi Müdürlüğü’ne ve ilgili yöneticilere teşekkür ederiz. Kurumun farklı birimlerinde çalışan ve araştırma süresince yönlendirme, yardım ve desteklerini esirgemeyen tüm personele şükranlarımızı sunarız.

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