ENVIRONMENTAL HANDBOOK OF FORT SHERMAN AND FORT GULICK, PANAMA CANAL ZONE
ARMY NATICK LABS MA
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This report presents a study of the environment of Fort Sherman and Fort Gulick in the Panama Canal Zone. The climate is humid tropical. An eight-month rainy period from May through December is followed by a four-month period of less rain from January through April. The diurnal temperature range is far greater than the mean annual range. Three major terrain categories have been distinguished undulating uplands, drained lowlands, and undrained lowlands. Eighty per cent of the total area - 13,765 acres - is undulating uplands characterized by low rolling hills, narrow valleys, and steep hillsides. The surface material is predominantly a thick, plastic clay. Vegetation consists primarily of tropical evergreen forest on the undulating uplands and some form of marsh plants or swamp forest on the lowlands.