000K utf8 1100 $c2005 1500 eng 2050 urn:nbn:de:gbv:8-diss-13810 3000 Pramono, Gatot Haryo 4000 The study of bedforms and equivalent roughness sizes in the Central Dithmarschen Bight$hChristian-Albrechts-Universität zu Kiel [Pramono, Gatot Haryo] 4030 Kiel$nChristian-Albrechts-Universität zu Kiel 4209 The bedforms and equivalent roughness sizes in tidal channels of the Central Dithmarschen Bight on the basis of field measurements and numerical modeling are studied. Side scan sonar and echo sounder were employed to acquire bedform dimensions, while acoustic profilers were used to measure current velocities. The equivalent roughness size is estimated on the basis of best fit line of velocities in the bottom boundary layer. The obtained bedform dimensions and flow conditions are used to check existing equations for estimation of bedform dimensions and equivalent roughness sizes. Numerical model simulations are also carried out in conjunction with modified equations to develop maps of bedforms and equivalent roughness sizes in the study area. In general, the empirical equations are able to predict bedform dimensions and equivalent roughness sizes in shallow areas. 4950 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-13810$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/diss_mods_00001381 5051 550 5550 Bedforms 5550 Equivalent Roughness 5550 Meldorf Bight 5550 Meldorfer Bucht 5550 Priel 5550 Rauigkeit 5550 Sohle <Wasserbau> 5550 Tidal Channel