Journals / İTÜ Dergisi Seri D: Mühendislik / 2005 / Cilt: 4 - Sayı: 5

Determination of regional flow duration curves

Bölgesel debi süreklilik eğrilerinin elde edilmesi

Pages
19–30
Publication Date
2022-10-19
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results obtained by using single linkage, median linkage, centroid linkage, average linkage, and weighted average linkage methods within other nonhierarchical methods could not be found applicable and meaningful in terms of flow duration relations.

📌 3 Key Takeaways

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Objective & Hypothesis:This study shows that regional flow duration curves can be obtained by means of methods of hierarchical or non-hierarchical cluster analysis in order to determine the design flow values of the regional hydroelectric potential where measured flow data do not exist or is incomplete/inadequate.
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Key Findings & Data:The regional flow duration curves are obtained, because it is appropriate for natural flow hydropower plants to use the probability of excess of flow duration curve, which is 30%-l00%, with cluster analysis by making data in that interval standard.
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Conclusion & Impact:The results obtained by using single linkage, median linkage, centroid linkage, average linkage, and weighted average linkage methods within other nonhierarchical methods could not be found applicable and meaningful in terms of flow duration relations.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

This study shows that regional flow duration curves can be obtained by means of methods of hierarchical or non-hierarchical cluster analysis in order to determine the design flow values of the regional hydroelectric potential where measured flow data do not exist or is incomplete/inadequate. It is determined that change of the boundaries of homogenous sub-regions depends on whether making or not making standard the specific flow duration curve values being used as data, and the used interval of specific flow duration curve and cluster analysis methods. The regional flow duration curves are obtained, because it is appropriate for natural flow hydropower plants to use the probability of excess of flow duration curve, which is 30%-l00%, with cluster analysis by making data in that interval standard. When the homogeneous regions formed in terms of specific flow duration curves with hierarchical and nonhierarchical cluster analysis methods by using the data used in this study are compared, it was observed that complete linkage method and Ward method within hierarchical methods and k-means method within nonhierarchical methods yield closer results to each other. The results obtained by using single linkage, median linkage, centroid linkage, average linkage, and weighted average linkage methods within other nonhierarchical methods could not be found applicable and meaningful in terms of flow duration relations.

Özet

Bu çalışmada, bölgesel ölçekte hidroelektrik potansiyelin belirlenmesinde akım ölçüm değeri olmayan veya eksik olan yerlerde proje debisinin belirlenmesi için hiyerarşik ve hiyerarşik olmayan küme analiz (cluster analysis) yöntemleri kullanılarak bölgesel debi süreklilik eğrilerinin elde edilebileceği ortaya konmuştur. Küme analiziyle oluşturulan homojen bölgelere ait sınırların, veri olarak kullanılan özgül debi değerlerinin standart hale getirilip getirilmemesine, özgül debi süreklilik eğrisinin kullanılan aralığına ve küme analiz yöntemine bağlı olarak değiştiği belirlenmiştir. Doğal akışlı hidroelektrik santraller için debi süreklilik eğrisinin aşılma olasılığı %30-%100 olan aralığının kullanılmasının uygun olması sebebiyle bu aralıktaki veriler standart hale getirilerek küme analiziyle bölgesel debi süreklilik eğrileri elde edilmiştir.

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Cite This Article

YANIK, B., AVCI, İ. (2022). Determination of regional flow duration curves. İTÜ Dergisi Seri D: Mühendislik, Cilt: 4 - Sayı: 5, 19–30. https://ajindex.com/articles/557308

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