ORAM Metric 3

Metric 3: Hydrology This particular metric has to deal with the movement of water within the wetland you are studying. Hydrology is the science that encompasses the occurrence, distribution, movement and properties of water and its relationship with the environment. Some sources of water that you may find in the wetland include:
  • High pH groundwater
  • Other groundwater
  • Precipitation
  • Seasonal/ Intermittent surface water
  • Perennial surface water (lake or stream)
Score all that apply for sources of water. When you get to section 3b, you may ask yourself, what is a riparian/upland corridor? A riparian zone/upland corridor is the area of plant habitat along the banks of a river. Using this description, score your wetland accordingly. In order to complete section 3e of the survey you will need to understand the differences between ditches, tiles, dikes, and weirs. A ditch is a narrow channel that has been dug into the ground. A tile is a pipe coming out of the ground. A dike is a sheet of rock that water runs over or is used in water regulation. A weir is something that cuts across the water and alters its flow. Using these terms will allow you to further examine section 3e. The scoring sheet asks to select choices for connectivity. What is connected with the wetland? Is it a 100 year old floodplain? Do you see evidence of human uses, such as paths or roads? Is it part of a wetland/upland complex? You can decide if it is part of a wetland/upland complex by the types of vegetation located there. Use the tree finder and wildflower guide to determine plants found in the wetland. Also, use the smartphone and Google "common wetland plants of Ohio" if you need more help. In terms of completing section 3d of the ORAM, saturation is considered to be wet, while inundated means completely soaked. The hydrologic regime includes the history of the natural water flow patterns of the specified wetland. Do you see any evidence of modifications of the hydrologic regime? If not, select none or none apparent. If so, decide if its recovered, recovering, or recent or no recovery. Make sure to check any disturbances observed in the box next to section 3e.

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