It moves primarily southeast through farmland and wooded swampland. The watershed had fertile farmland, timberland and swampland. Typical barriers to conventional landing craft are soft sandy beaches, marshes, swampland, and loose surfaces. Gorilla habitat ranges from montane forest to swampland. Originally, Balboa Island was little more than a mudflat surrounded by swampland. The coastal plain is normally wet, including many rivers, marsh, and swampland. Relatively high-lying swampland was drained to be used as farmland. They inhabit a variety of habitat types, from arid areas to swampland. Approximately half landed nearby in grassy swampland along the river. An isthmus of swampland named The Neck separates the North from the South. They continued to thrive as denizens of swampland and tidal channels throughout the period. Before 1850, Englewood was an oak forest with much swampland. The predominance of swampland, level terrain, and small, shallow lakes hinders large-scale movement of water. The area between Amsterdam, Haarlem and Leiden was, in prehistoric times swampland and small lakes. The Chinese government also assisted local communities in constructing dikes for swampland water drainage.