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					Managing your wetland: |  
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					Green tree reservoirs |  
					| Requirements | page 2 of 4 |  
					| Although green tree reservoirs can vary widely, most have 
					the following attributes in common.
 
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							| Bottomland hardwoods (oaks, gums, ashes) at least 40 
							years old. A 
							minimum of 10 acres. A relatively flat 
							area. Soils with good 
							water holding capability - impervious clays are 
							best. Proximity to 
							traditional waterfowl wintering grounds and flight 
							paths. Dependable water 
							supply |  
							|  | Potential 
								sources are: a nearby water storage reservoir at 
								a higher elevation; pumping ground water or 
								surface water (nearby stream or pond); natural 
								rainfall and drainage; and temporary diversion 
								or blockage of minor streams. Using water from a 
								storage reservoir or collecting rainfall and 
								runoff are the best alternatives; however, 
								during some years these preferred methods may 
								not provide enough water. |  A series of dikes and 
					levees to control water levels. |  |  |