Roughness definitionRoughness definitionhttps://oss.deltares.nl/c/message_boards/find_thread?p_l_id=1806765&threadId=14111092024-03-19T11:04:01Z2024-03-19T11:04:01ZRoughness definitionKurt Glockhttps://oss.deltares.nl/c/message_boards/find_message?p_l_id=1806765&messageId=14111082017-12-20T10:55:29Z2017-12-20T10:55:29ZHey.<br /><br />In D3D it´s possible to choose between different roughness values (Manning, White-Colebrook or Chezy).<br />Are these values are directly used in the numerical code or are they calculated into the equivalent sand roughness and afterwards used in the hydrodynamic equations in the numerical code.<br /><br />Thanks in advance,<br />KurtKurt Glock2017-12-20T10:55:29Z