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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Numerical modeling of estuarine circulation and morphodynamics in the yellow river delta and bohai s...
Numerical modeling of estuarine circulation and morphodynamics in the yellow river delta and bohai sea
Author : CHRISTIAN JORDAN(1), OLIVER LOJEK(2), ARNE STAHLMANN(3) & TORSTEN SCHLURMANN(4)
ABSTRACT
Numerical modeling is an established method for gaining insights into estuarine circulation and mixing processes as well
as sediment distributions and morphological dynamics. As part of the DELIGHT (Delta Information System for
Geoenvironmental and Human Habitat Transition, http://www.delight.eoc.dlr.de/en) research project, which aims at
building a comprehensive delta development tool and decision system, numerical models are set up in order to investigate
the hydro- and morphodynamic situation of the Yellow River Delta. A numerical model of the delta and corresponding tidal
model of the Bohai Sea as well as first simulation results will be presented here. The models are being developed using
extensively tested and validated open source software codes. The setup of the Yellow River Delta model is widely based
on field measurements, stemming from an in-situ field survey carried out in October 2013, which also provides calibration
data sets. Along with bathymetric data, 3D-current velocities have been measured as well as suspended sediment
concentrations and different water quality parameters. The Yellow River Delta model so far has been calibrated for
hydrodynamics, with morphodynamic calibration being the next step in the development of the delta model. The Bohai Sea
model relies on global databases for bathymetry and tidal forcing and was calibrated against observations as well as data
from literature. The models are developed in order to gain insight into the estuarine circulation processes and for
researching probable climate change impacts as well as storm surge and flooding hazards, sediment distribution patterns
and alterations in morphodynamics forming the bathymetry of the delta. Supplementary data for calibration and validation
purposes will be gathered during a second field campaign scheduled for mid-2015, aimed at capturing an anthropogenic
reservoir-flushing process, entailing high sediment concentrations and discharge volumes.
File Size : 2,636,728 bytes
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 20/08/2015
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