INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (5831, 'EPSG', 5831, '+vunits=m +no_defs +type=crs', 'VERT_CS["Instantaneous Water Level depth",VERT_DATUM["Instantaneous Water Level",2005,AUTHORITY["EPSG","5113"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Depth",DOWN],AUTHORITY["EPSG","5831"]]');