Geri Dön

Towards improved modeling for hydrologic predictions in poorly gauged basins

Başlık çevirisi mevcut değil.

  1. Tez No: 400159
  2. Yazar: KORAY KAMİL YILMAZ
  3. Danışmanlar: DR. HOSHİN GUPTA
  4. Tez Türü: Doktora
  5. Konular: İnşaat Mühendisliği, Civil Engineering
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2007
  8. Dil: İngilizce
  9. Üniversite: The University of Arizona
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 263

Özet

Özet yok.

Özet (Çeviri)

In most regions of the world, and particularly in developing countries, the possibility and reliability of hydrologic predictions is severely limited, because conventional measurement networks (e.g. rain and stream gauges) are either nonexistent or sparsely located. This study, therefore, investigates various systems methods and newly available data acquisition techniques to evaluate their potential for improving hydrologic predictions in poorly gauged and ungauged watersheds.Part One of this study explores the utility of satellite-remote-sensing-based rainfall estimates for watershed-scale hydrologic modeling at watersheds in the Southeastern U.S. The results indicate that satellite-based rainfall estimates may contain significant bias which varies with watershed size and location. This bias, of course, then propagates into the hydrologic model simulations. However, model performance in large basins can be significantly improved if short-term streamflow observations are available for model calibration.Part Two of this study deals with the fact that hydrologic predictions in poorly gauged/ungauged watersheds rely strongly on a priori estimates of the model parameters derived from observable watershed characteristics. Two different investigations of the reliability of a priori parameter estimates for the distributed HL-DHMS model were conducted. First, a multi-criteria penalty function framework was formulated to assess the degree of agreement between the information content (about model parameters) contained in the precipitation-streamflow observational data set and that given by the a priori parameter estimates. The calibration includes a novel approach to handling 17spatially distributed parameters and streamflow measurement errors. The results indicated the existence of a significant trade-off between the ability to maintain reasonable model performance while maintaining the parameters close to their a priori values. The analysis indicates those parameters responsible for this discrepancy so that corrective measures can be devised. Second, a diagnostic approach to model performance assessment was developed based on a hierarchical conceptualization of the major functions of any watershed system. -Signature measures? are proposed that effectively extract the information about various watershed functions contained in the streamflow observations. Manual and automated approaches to the diagnostic model evaluation were explored and were found to be valuable in constraining the range of parameter sets while maintaining conceptual consistency of the model.

Benzer Tezler

  1. An improved multi-component metric for spatial pattern calibration of hydrologic models

    Hidrolojik modellerin örüntüye dayalı kalibrasyonu için çok bileşenli metrik geliştirilmesi

    EYMEN BERKAY YORULMAZ

    Yüksek Lisans

    İngilizce

    İngilizce

    2024

    İnşaat Mühendisliğiİstanbul Teknik Üniversitesi

    İnşaat Mühendisliği Ana Bilim Dalı

    DOÇ. DR. MEHMET CÜNEYD DEMİREL

  2. GR6J hidrolojik modelindeki artık yağış ayrıştırma sabitinin model kalibrasyonuna etkisi

    Effect of residual rainfall separation constant on model calibration in the GR6J hydrological model

    HALİL İBRAHİM DEMİR

    Yüksek Lisans

    Türkçe

    Türkçe

    2024

    İnşaat Mühendisliğiİstanbul Teknik Üniversitesi

    İnşaat Mühendisliği Ana Bilim Dalı

    DOÇ. DR. MEHMET CÜNEYD DEMİREL

  3. Assessing the performance of gridded precipitation products – a comparative analysis of the Black Sea and East Africa regions

    Gridli yağış ürünlerinin performansının belirlenmesi - Karadeniz ve Doğu Afrika bölgelerinin karşılaştırmalı analizi

    SEAD AHMED SWALIH

    Doktora

    İngilizce

    İngilizce

    2022

    İnşaat Mühendisliğiİstanbul Teknik Üniversitesi

    İnşaat Mühendisliği Ana Bilim Dalı

    PROF. DR. ERCAN KAHYA

  4. Eğirdir Gölü su kalite modellemesi

    Başlık çevirisi yok

    ALİ FUAT AYDIN

    Yüksek Lisans

    Türkçe

    Türkçe

    1993

    Çevre Mühendisliğiİstanbul Teknik Üniversitesi

    PROF.DR. HASAN Z. SARIKAYA

  5. Modelling a wetland for sustainable development: Uluabat lake

    Bir sulak alanın sürdürülebilir kalkınmaya yönelik modellenmesi: Uluabat Gölü

    BURAK GÜNERALP

    Yüksek Lisans

    İngilizce

    İngilizce

    2000

    Endüstri ve Endüstri MühendisliğiBoğaziçi Üniversitesi

    Endüstri Mühendisliği Ana Bilim Dalı

    PROF. DR. YAMAN BARLAS