Effective Work Index (W) Range of Geomorphically Significant flows Characteristics of Bed and Bank Materials c bi Stream Flow c Normal Dry Weather Flow Level
Erosion Potential (Ep) Post-Urban Pre-Urban Work Done Time Shear Stress c
Concept behind flow duration control standard Pre vs. Post-Development Flow Flow Bins Frequency (counts) Pre-Development Flows Post-Development Flows Post-Development Flows with Duration Control Flow Bins Frequency (counts) Matching Flow Duration Q c Q c
Flow-Duration Example 1 (Orange County, Gobernadora Canyon)
Flow-Duration Example 2 (Orange County, Chiquita Canyon)
What roles can and should technology play in addressing specific urban water control problems?
Can passive approaches achieve optimal solutions given the realities of the built environment?
What could we do with dynamic controls?
What is the state of the art?
Revisiting the Big Picture
New Directions Consumer Behavior Modification Optimization
Ambient Information Systems Goal Information Conveyed to Individual Target Outcomes Reduce Consumptive Use Waste Individual feedback on instantaneous and/or monthly cumulative water use, water pricing data, and/or system demand. Information regarding irrigation consumption best practice based on weather and/or climatic data. Indicating and alerting individuals to changes in local regulatory actions relative to consumptive use such as irrigation bans. Reductions in consumptive use and changes in timing of use as a result of feedback and awareness of impacts. Optimize Storm Water Control Usage Information on how to optimize use of storm water controls that require individual participation (e.g., rain barrel, blue roof, or cistern management). Optimal use of Rain Barrels or other controls which require operator control and decision making (e.g., drain or leave full) for volume control in urbanized areas. Reduce CSO Impacts Information regarding receiving water quality and CSO status in combined sewer areas. Consumptive use changes based on direct impacts on receiving waters. These could include but are not limited to timing or other decisions about consumptive use and decisions about waste water quality (e.g., what do I send down the drain at a given time).