This is a large flat area South of the mountain range in east Catland that divides the continent into it's own East and West. Rivers seasonally break their banks and flood, creating lush wetlands. Go far South enough where the daily average rainfall increases and this is a near-permanent condition in some of these flat stretches of land. Closer to the coast deltas of braided rivers and sheets of flood water cross the sediment that has been deposited, top layers of which are enriched with organic matter, under a carpet of brackish wetland grasses.

Despite it's tropical climate it sees a mix of both temperate and subtropical climate patterns. As mentioned, the North of this area experiences a break in rainfall in winter resulting in drier conditions. The Southernmost part of this zone experiences the most winter rainfall hitting it's soil. There summer is drier but not dry enough to stop rivers. During this time the delta is quenched by supplementary rainfall occurring in the warmer, more humid climate further North and feeding it's rivers and flooding areas of land.