5. Wetlands: Where does all the water go? According to the Environmental Protect

Question

5. Wetlands: Where does all the water go? According to the Environmental Protection Agency (EPA) in a typical wetland environment, 38% of the water is outflow, 47% is seepage, 7% evaporates, and 8% remains a water volume in the ecosystem. (Reference: U.S. Environmental Protection Agency Case Studies Report 832-R-93-005). Chloride compounds as residuals from residential areas are a problem for wetlands. Suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow 64.1, seepage 75.8, remaining due to evaporation 23.9, in the water volume 68.2.

a) Compute the weighted average of chlorine compound concentration in milligrams per liter (mg/l) for this ecological system.

b) Suppose the EPA has established an average compound concentration target of no more than 58 mg/l. Comment on whether this wetlands system meets the target standard for chlorine compound concentration.

Explanation / Answer

5)A) THE WIGHTED AVERAGE = (64.1+75.8+23.9+68.2) / 4 = 58

B) YES THE WEIGHTED AVERAGE OF THE CLORINE COMPOUND COMES EQUAL TO BE 58 THEREFORE THE WETLANDS SYSTEM MEETS THE TARGET OF 58.

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