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Numerical Modelling of Ice Floods in the Ning-Meng Reach of the Yellow River Basin (Paperback)
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Numerical Modelling of Ice Floods in the Ning-Meng Reach of the Yellow River Basin (Paperback)
Series: IHE Delft PhD Thesis Series
Expected to ship within 12 - 17 working days
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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 the region 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 of adequate 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
with field 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 ice
flood 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.
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