Morphometric Features of Esmahanım Creek Basin (Akcakoca-Duzce) and its Effects on Overflow

Vedat Avci

Makale detayları

Morphometric Features of Esmahanım Creek Basin (Akcakoca-Duzce) and its Effects on Overflow

Yazarlar:

Vedat Avci

Yayıncı:

Bartin University

Ana Başlıklar:

Orman Endüstri Mühendisliği

Dergi:

Bartın Orman Fakültesi Dergisi Vol.25 Issue 1, pp.96-118

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001285008

pISSN:

1302-0943

Anahtar kelimeler:

Özet:

 In this study it is aimed to evaluate the effects of morphometric features of Esmahanım Creek Basin on the formation of overflow. In the overflow that occured on the 18th of July 2019, 7 people lost their lives, and roads, settlements, vehicles and cultivation areas were damaged in Esmahanım Village. In the over-flow, which also affected Akçakoca district, Esmahanım and Ugurlu Villages experienced damages the most. Esmahanım Creek Basin was determined as the study area due to the highest overflow impact. Being a tributary of Melen Stream, Esmahanım Creek joins the stream in Ugurlu village. In the basin where the relative elevation difference is much, overflow take place in fields with little slope where tributaries meet with the main stream. Digital Elevation Model DEM, which is the basic data set in the study, was created using topographic maps of 125,000 scale. Sub-basins forming the Esmahanım Creek Basin were deter-mined from DEM with the resolution of 10x10 m. Within the scope of morphometric analyses, 24 indices revealing geometric, areal and relief morphometric features were applied to the sub-basins and then basins were compared relatively. When the results of analyses are evaluated in terms of some basin parameters, the drainage density Dd and stream frequency Fc are high, in general. The degree of dissection is high, and hypsometric curves and integral values in the source section show the young topography and high erosion risk. In the basin where morphometric features have increasing effects on the overflow hazard, it will be beneficial to take into account the features of the sub-basins when planning studies are carried out. Erosion prevention is the primary study on the basis of micro-basin. The drainage density means high surface flow after precipitation. Hence, vegetation should be protected and strengthened to delay the pre-cipitation from reaching the rivers. When the relief characteristics of the basins are combined with those of lithology, climate, landslides occur frequently and increase the level of overflow damage. Therefore, stud-ies should be carried out to reduce landslide damages.

 In this study it is aimed to evaluate the effects of morphometric features of Esmahanım Creek Basin on the formation of overflow. In the overflow that occured on the 18th of July 2019, 7 people lost their lives, and roads, settlements, vehicles and cultivation areas were damaged in Esmahanım Village. In the over-flow, which also affected Akçakoca district, Esmahanım and Ugurlu Villages experienced damages the most. Esmahanım Creek Basin was determined as the study area due to the highest overflow impact. Being a tributary of Melen Stream, Esmahanım Creek joins the stream in Ugurlu village. In the basin where the relative elevation difference is much, overflow take place in fields with little slope where tributaries meet with the main stream. Digital Elevation Model DEM, which is the basic data set in the study, was created using topographic maps of 125,000 scale. Sub-basins forming the Esmahanım Creek Basin were deter-mined from DEM with the resolution of 10x10 m. Within the scope of morphometric analyses, 24 indices revealing geometric, areal and relief morphometric features were applied to the sub-basins and then basins were compared relatively. When the results of analyses are evaluated in terms of some basin parameters, the drainage density Dd and stream frequency Fc are high, in general. The degree of dissection is high, and hypsometric curves and integral values in the source section show the young topography and high erosion risk. In the basin where morphometric features have increasing effects on the overflow hazard, it will be beneficial to take into account the features of the sub-basins when planning studies are carried out. Erosion prevention is the primary study on the basis of micro-basin. The drainage density means high surface flow after precipitation. Hence, vegetation should be protected and strengthened to delay the pre-cipitation from reaching the rivers. When the relief characteristics of the basins are combined with those of lithology, climate, landslides occur frequently and increase the level of overflow damage. Therefore, stud-ies should be carried out to reduce landslide damages.

 In this study it is aimed to evaluate the effects of morphometric features of Esmahanım Creek Basin on the formation of overflow. In the overflow that occured on the 18th of July 2019, 7 people lost their lives, and roads, settlements, vehicles and cultivation areas were damaged in Esmahanım Village. In the over-flow, which also affected Akçakoca district, Esmahanım and Ugurlu Villages experienced damages the most. Esmahanım Creek Basin was determined as the study area due to the highest overflow impact. Being a tributary of Melen Stream, Esmahanım Creek joins the stream in Ugurlu village. In the basin where the relative elevation difference is much, overflow take place in fields with little slope where tributaries meet with the main stream. Digital Elevation Model DEM, which is the basic data set in the study, was created using topographic maps of 125,000 scale. Sub-basins forming the Esmahanım Creek Basin were deter-mined from DEM with the resolution of 10x10 m. Within the scope of morphometric analyses, 24 indices revealing geometric, areal and relief morphometric features were applied to the sub-basins and then basins were compared relatively. When the results of analyses are evaluated in terms of some basin parameters, the drainage density Dd and stream frequency Fc are high, in general. The degree of dissection is high, and hypsometric curves and integral values in the source section show the young topography and high erosion risk. In the basin where morphometric features have increasing effects on the overflow hazard, it will be beneficial to take into account the features of the sub-basins when planning studies are carried out. Erosion prevention is the primary study on the basis of micro-basin. The drainage density means high surface flow after precipitation. Hence, vegetation should be protected and strengthened to delay the pre-cipitation from reaching the rivers. When the relief characteristics of the basins are combined with those of lithology, climate, landslides occur frequently and increase the level of overflow damage. Therefore, stud-ies should be carried out to reduce landslide damages.

 Bu çalışmada Esmahanım Deresi Havzasının morfometrik özelliklerinin taşkın oluşumdaki etkisinin değerlendirilmesi amaçlanmıştır. 18 Temmuz 2019 tarihinde havzada meydana gelen taşkında, Esmahanım köyünde 7 kişi hayatını kaybetmiş, yollar, meskenler, araçlar ve ekili-dikili araziler zarar görmüştür. Ak-çakoca ilçesini de etkileyen taşkında, en fazla zarar Esmahanım ve Uğurlu köylerinde yaşanmıştır. Taşkın etkilerinin en fazla olduğu Esmahanım Deresi Havzası, çalışma alanı olarak belirlenmiştir. Esmahanım Deresi, Melen Çayının bir kolu olup, Uğurlu köyünde bu akarsuya bağlanmaktadır. Nisbi yükselti farkının fazla olduğu havzada, yan kolların ana akarsuyla birleştiği az eğimli sahalarda taşkınlar meydana gelmekte-dir. Bu çalışmada temel veri seti Sayısal Yükseklik Modeli SYM, 125.000 ölçekli topoğrafya haritaları kullanılarak oluşturulmuştur. 10x10 m çözünürlüğündeki SYMden Esmahanım Deresi Havzasını oluştu-ran alt havzalar belirlenmiştir. Morfometrik analizler kapsamında alt havzalara; geometrik, alansal ve relief morfometrik özellikleri ortaya koyan 24 indis uygulanmış ve havzalar göreceli olarak karşılaştırılmıştır. Analiz sonuçları bazı havza parametreleri açısından değerlendirildiğinde; genel olarak drenaj yoğunluğu Dd ve akarsu sıklığı Fs değerleri yüksektir. Yarılma derecesi yüksek olup, kaynak kısmındaki alt hav-zaların hipsometrik eğrileri ve integral değerleri genç topoğrafyayı ve buna bağlı olarak yüksek erozyonu göstermektedir. Morfometrik özelliklerin taşkın tehlikesini artırıcı etkide bulunduğu havzada, yapılacak planlama çalışmalarında alt havzaların morfometrik özelliklerinin dikkate alınması yararlı olacaktır. Bu çalışmaların başında mikro havza bazında erozyonu önleyici çalışmalar gelmektedir. Drenaj yoğunluğunun fazla olması yağış sonrası yüzeysel akışın hızlı olacağı anlamına gelmektedir. Bu nedenle yağışın, akarsula-ra ulaşmasını geciktirmek için bitki örtüsü korunmalı ve güçlendirmelidir. Havzaların relief özellikleri, litoloji ve iklim özellikleri ile birleştiğinde heyelanlar yoğun olarak meydana gelmekte ve taşkınların zarar derecesini büyütmektedir. Bu nedenle heyelan zararlarını azaltıcı çalışmalar yapılmalıdır.

Makale detayları

Morphometric Features of Esmahanım Creek Basin (Akcakoca-Duzce) and its Effects on Overflow

Yazarlar:

Vedat Avci

Yayıncı:

Bartin University

Ana Başlıklar:

Orman Endüstri Mühendisliği

Dergi:

Bartın Orman Fakültesi Dergisi Vol.25 Issue 1, pp.96-118

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001285008

pISSN:

1302-0943

Akçakoca

Düzce

overflow

Esmahanım Creek Basin

morphometry

Akçakoca

Düzce

taşkın

Esmahanım Deresi Havzası

morfometri

Sayı

Makale detayları

Yazarlar: Vedat Avci

Yayıncı: Bartin University

Ana Başlıklar: Orman Endüstri Mühendisliği

Dergi: Bartın Orman Fakültesi Dergisi Vol.25 Issue 1, pp.96-118

Belge Tipi: Makale

Yayın Tarihi: 4/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001285008

pISSN: 1302-0943

Sayı

Yazarlar:

Vedat Avci

Yayıncı:

Bartin University

Ana Başlıklar:

Orman Endüstri Mühendisliği

Dergi:

Bartın Orman Fakültesi Dergisi Vol.25 Issue 1, pp.96-118

Belge Tipi:

Makale

Yayın Tarihi:

4/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001285008

pISSN:

1302-0943