What is the maximum slope for Level 1 (Dry) Swale?

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Study for the DEQ Stormwater Management Inspector Test. Use flashcards and multiple choice questions with hints and explanations to prepare for your exam. Get ready and certified!

Multiple Choice

What is the maximum slope for Level 1 (Dry) Swale?

Explanation:
Level 1 (Dry) Swale is designed to convey and infiltrate runoff with a very gentle slope. Keeping the slope under 2% ensures the flow stays shallow and spread out rather than concentrated, which promotes infiltration and reduces erosion. If the slope reached or exceeded 2%, the swale would behave more like a steeper drainage channel, undermining its dry, infiltrating function. A completely flat swale (0%) wouldn’t drain properly in rainfall events. So the maximum slope for Level 1 (Dry) Swale is less than 2%.

Level 1 (Dry) Swale is designed to convey and infiltrate runoff with a very gentle slope. Keeping the slope under 2% ensures the flow stays shallow and spread out rather than concentrated, which promotes infiltration and reduces erosion. If the slope reached or exceeded 2%, the swale would behave more like a steeper drainage channel, undermining its dry, infiltrating function. A completely flat swale (0%) wouldn’t drain properly in rainfall events. So the maximum slope for Level 1 (Dry) Swale is less than 2%.

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