Lecture 19 - 1 ERS 482/682 (Fall 2002) Urbanization ERS 482/682 Small Watershed Hydrology.

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Presentation transcript:

Lecture ERS 482/682 (Fall 2002) Urbanization ERS 482/682 Small Watershed Hydrology

Lecture ERS 482/682 (Fall 2002) Figure 11-14: Dunne and Leopold (1978)

Lecture ERS 482/682 (Fall 2002) Effects on hydrology Aurora Reservoir

Lecture ERS 482/682 (Fall 2002)

Lecture ERS 482/682 (Fall 2002)

Lecture ERS 482/682 (Fall 2002) Effects on hydrology If storm size stays same (e.g., 2-year storm with 1 inch rainfall) –More runoff –Higher peak flows –More perennial flow

Lecture ERS 482/682 (Fall 2002) Impacts on receiving waters Increased channel erosion –Reduced habitat –Reduced wetlands Increased flooding downstream

Lecture ERS 482/682 (Fall 2002) Impacts on water quality Increased loading of –Suspended solids –Nutrients –Heavy metals –Fecal bacteria

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) –Practices that are a combination of management, cultural, and structural approaches that most effectively and economically control urbanization effects without disturbing the quality of the environment

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) Source:

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) Source:

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) Figure 11-17: Dunne and Leopold (1978)

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) Figure 11-22: Dunne and Leopold (1978)

Lecture ERS 482/682 (Fall 2002) “Remedies” Best Management Practices (BMPs) Figure 11-19: Dunne and Leopold (1978)