Print Email Facebook Twitter Numerical modelling of ice floods in the Ning-Meng reach of the Yellow River basin Title Numerical modelling of ice floods in the Ning-Meng reach of the Yellow River basin Author Wang, C. (TU Delft Environmental Fluid Mechanics) Contributor Mynett, A.E. (promotor) Popescu, I. (copromotor) Degree granting institution Delft University of Technology Date 2017-12-08 Abstract The Ning-Meng reach of the Yellow River basin is located in the Inner Mongolia region at the Northern part of the Yellow River. Due to the special geographical conditions, the river flow direction is towards the North causing the Ning-Meng reach to freeze up every year in wintertime. Both during the freeze-up and break-up period, unfavourable conditions occur which may cause ice jamming and ice dam formation leading to dike breaching and overtopping of the embankment. Throughout history this has often led to considerable casualties and property loss. Enhanced economic development and human activities in theregion have altered the characteristics of the ice regime in recent decades, leading to several ice disasters during freezing or breaking-up periods. The integrated water resources management plan developed by the Yellow River Conservancy Commission (YRCC) outlines the requirements for water regulation in the upper Yellow River during ice flood periods. YRCC is developing measures that not only safeguard against ice floods, but also assure the availability ofadequate water resources. These provide the overall requirements for developing an ice regime forecasting system including lead-time prediction and required accuracy. In order to develop such a system, numerical modelling of ice floods is an essential component of current research at the YRCC, together withfield observations and laboratory experiments. In order to properly model river ice processes it is necessary to adjust the hydrodynamic equations to account for thermodynamic effects. In this research, hydrological and meteorological data from 1950 to 2010 were used to analyse the characteristics of ice regimes in the past. Also, additional field observations were carried out for iceflood model calibration and validation. By combining meteorological forecasting models with statistical models, a medium to short range air temperature forecasting model for the Ning-Meng reach was established. These results were used to improve ice formation modelling and prolong lead-time prediction. The numerical ice flood model developed in this thesis for the Ning-Meng reach allows better forecasting of the ice regime and improved decision support for upstream reservoir regulation and taking appropriate measures for disaster risk reduction. To reference this document use: http://resolver.tudelft.nl/uuid:cda74938-1f82-41f2-aa48-3610d3fd2472 Publisher CRC Press / Balkema - Taylor & Francis Group ISBN 978-1-138-48701-7 Bibliographical note Dissertation submitted in fulfillment of the requirements of the Board for Doctorates of Delft University of Technology and of the Academic Board of the UNESCO-IHE Institute for Water Education. Part of collection Institutional Repository Document type doctoral thesis Rights © 2017 C. Wang Files PDF 2017_UNESCO_IHE_PHD_THESI ... WANG_i.pdf 19.53 MB Close viewer /islandora/object/uuid:cda74938-1f82-41f2-aa48-3610d3fd2472/datastream/OBJ/view