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Ohatchee Creek / Coosa River Confluence EarthCache

This cache has been archived.
Hidden : 10/20/2010
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size:   not chosen (not chosen)

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Geocache Description:

Located at a roadside park perfect for a picnic. Use caution during high rains as this area downstream of the dam is susceptible to flooding. This area is wheelchair friendly but you may need assistance completing the logging requirements.



Confluence - Confluence, in geography, describes the meeting of two or more bodies of water. It usually refers to the point where a tributary joins a more major river. Here you will see the joining of the Ohatchee Creek and the Coosa River. Joining together, these two bodies of water have greatly increased their ability to carve its way through the landscape. Factors affecting the flow rate of a river are referred to as Catchment factors and all determine the amount of water that reaches the rivers. Catchment factors are: topography, shape, size, soil type and land use (paved or roofed areas). Catchment topography and shape determine the time taken for rain to reach the river, Catchment size, soil type and development determine the amount of water to reach the river.

A River starts at a point called its source, and enters a sea or lake at its Mouth. Along its length it may be joined by smaller rivers called tributaries; A river and its tributaries are contained within a drainage basin called the watershed.

About 90% of the Coosa River is in Alabama. It begins at the confluence of the Oostanaula and Etowah Rivers in Rome, Georgia, and ends just northeast of the Alabama state capital, Montgomery, where it joins the Tallapoosa River to form the Alabama River just south of Wetumpka.

 

The Ohatchee Creek is formed near the town of Ohatchee (a few miles NE of this location) by the confluence of the Tallasahatchee Creek and several smaller tributaries.

Just north of here was once the crossing of the Harts Ferry. During low water times you can catch a glimpse of the remains of this ferry on the far bank of the Coosa.

Educational requirements:Email, through our profile link, the answers to the following questions, do not post them in your logs please (even encrypted).

  1. Calculate the flow rate in "Feet Per Second" for the Ohatchee Creek and the Coosa River. This may be done by measuring a distance along each of the rivers banks, floating a natural object such as a leaf or small twig from your starting point to the ending point, and recording the time it takes the object to float the distance. Once the "Distance" and "Time" are determined, calculate the "Feet Per Second" for each waterway. It is possible for the Creek to have a negative flow depending on the flow of the river.
  2. Estimate the width of the Ohatchee Creek where it comes into the Coosa River measuring at the Boat ramp.
  3. Estimate the width of the Coosa River (looking out over the fishing pier.)
  4. What direction is the Ohatchee Creek flowing at this confluence? North, South, East, or West. Compass heading will work if you would rather measure degrees.
  5. A photo posted with your log entry would be a nice addition to commemorate your visit. Although not a requirement, it would be appreciated.

 

 

References: Google Earth
Wikipedia - Coosa River, watersheds, and tributaries.

 

 

 

Additional Hints (No hints available.)