35.2 - Difference Between Porosity, Specific Yield, and Specific Retention
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Practice Questions
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Define porosity in your own words.
💡 Hint: Think about how much space exists between particles.
What does specific yield measure?
💡 Hint: Consider what happens when water drains out through gravity.
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Interactive Quizzes
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What does porosity measure?
💡 Hint: Think about the space available for water storage.
True or False: Specific yield is the same as porosity.
💡 Hint: Recall the definitions of both terms.
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Challenge Problems
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An aquifer has a porosity of 0.35, and its particles are mainly composed of fine sand that retains a significant amount of water through adhesion. Analyze what this means for both specific yield and specific retention.
💡 Hint: Consider what 'fine sand' characteristics indicate about its ability to yield water.
If you have an aquifer with a porosity of 0.40 and you find through experimentation that it has a specific retention of 0.10, how would you evaluate its potential for sustainable yield, discussing possible scenarios?
💡 Hint: Think about how much water is available and needed to maintain the ecosystem.
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