# # National Water Information System # 2024/12/22 # # # Date Retrieved: USGS Water Data for the Nation Help System # vert_vel_dstrb_cd vert_vel_dstrb_nm vert_vel_dstrb_ds 4s 12s 88s UNSP Unspecified The vertical velocity distribution was not specified. UNKN Unknown The vertical velocity distribution was unknown (single point samples). UNFM Uniform The vertical velocity was mostly uniform from top to bottom. STND Standard The vertical velocity distribution predominantly matched a standard profile. NSTD Non-standard The vertical velocity distribution has many areas of non-standard velocity distribution.