RWB meaning in Academic & Science ?

Answer: What is Rainwater Basin mean?

The Rainwater Basin wetland region is a 4,200 sq mi (11,000 km2) loess plain located south of the Platte River in south-central Nebraska. It lies principally in Adams, Butler, Clay, Fillmore, Hamilton, Kearney, Phelps, Polk, Saline, Seward, and York counties and extends into adjacent areas of southeastern Hall, northern Franklin, northern Nuckolls, western Saline, northern Thayer and northwestern Webster counties. Before European settlement, this plain was covered by prairie grasslands interspersed with thousands of ephemeral playa wetlands, called Rainwater Basins. Informally and locally, individual Nebraska Rainwater Basins are referred to as rainbasins, basins, lagoons, lakes, ponds, marshes, hay marshes, and lakes marshes. To the west, a tallgrass prairie in the east once gradually transitioned into mixed grass prairie. Currently, the Rainwater Basin wetland region is covered by farms, mainly growing corn and soybeans. Several, interspersed, stream courses, of which largest is the Big Blue River and its tributaries, drain this region. Riparian woodlands and upland slopes possessing oak woodlands are associated with these streams. In the spring and fall months, millions of migratory birds pass through the region to feed and rest. Along with riparian habitats associated Platte River, Big Blue River, its tributaries, and smaller streams, Rainwater Basins are a major component of the Central Flyway of North America.

Prior to its agricultural development in historic times, the Rainwater Basin wetland region was characterized by numerous playa wetlands, Rainwater Basins, numbering in the thousands. The shallow depressions, in which these wetlands occur are lined with a nearly impervious layer of clayey soil, a claypan, that prohibits surface water from penetrating the subsoil. As a result, Rainwater Basins are not naturally influenced by the water table and the sole source of water is run-off in the form of rain, snow and, currently, drainage from crop irrigation. Because the primary source of water for these wetlands is precipitation, they annually vary in depth, expanse and seasonality due to changes in precipitation regimes and are called Rainwater Basins.

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