Re-Engineering Water Storage in the Everglades Risks and Opportunities (2005) / Chapter Skim
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Pages 93-99
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From page 93... ...
93 5 Evaluating Ecological Tradeoffs INTRODUCTION The primary strategy for restoring the Everglades ecosystem is the restoration, to the extent possible, of the hydrologic regime. However, the ultimate goal is restoration of the Greater Everglades Ecosystem while meeting society's needs for flood control and water supply.
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From page 94... ...
94 Re-Engineering Water Storage in the Everglades: Risks and Opportunities performance measure that could be used together with specific indicators and performance measures already in place to help to evaluate restoration progress and alternatives, including reevaluation and refinement of restoration goals. The proposed system performance indicator does not in itself lead to decisions; instead, it allows alternative scenarios or outcomes to be evaluated.
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From page 95... ...
Evaluating Ecological Tradeoffs 95 A Conceptual System Performance Measure To help in its goal of restoring the hydrologic regime of the Everglades, the South Florida Water Management Model provides a quantitative tool for predicting how various restoration strategies would modify the hydrologic regime. For these reasons we base our conceptual system performance measure on hydrologic performance measures.
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From page 96... ...
96 Re-Engineering Water Storage in the Everglades: Risks and Opportunities SPM j = wi i=1 n∑ fi x j( ) We recommend that in the initial uses of the proposed indicator, all of the weights be equal, in which case wi = 1/n for all i.
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From page 97... ...
Evaluating Ecological Tradeoffs 97 Figure 5-1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0 0.2 0.4 0.6 0.8 1 xi/xiT f( x i/ x T ) Series 2 Series 1 FIGURE 5-1.
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From page 98... ...
98 Re-Engineering Water Storage in the Everglades: Risks and Opportunities Figure 5-2 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0.5 0.6 0.7 0.8 0.9 1 Q/Q* x i Series 1 Series 2 Figure 5-2.
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From page 99... ...
Evaluating Ecological Tradeoffs 99 This SPM is much lower than the optimal value of 0.96, indicating a very inefficient allocation of water. However, this allocation is optimal if w1 = 0.955 and w1 = 0.45, since for this set of weights SPM = (0.955)
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