San José State University CE 174 – Design of Water Distribution and Wastewater Collection Systems Lecture # 7 by Bassam Kassab Chapter 12: Urban Runoff and Combined Sewer Overflow Management Please read the following sections: Section 12.1: Hydrologic Impact of Urbanization Section 12.5: Urban Runoff Control Practices 12.5.1: Regulatory Controls 12.5.2: Source Control Practices 12.5.3: Detention Facilities 12.5.4: Infiltration Facilities 12.5.5: Vegetative Practices 12.5.6: Filtration Practices 12.5.7: Water Quality Inlets Section 12.6: Combined Sewer Overflow Control Practices 12.6.1: Source Controls 12.6.2: Collection System Controls 12.6.3: Storage 12.6.4: Treatment Section 12.7: Selection of Best Management Practices 12.7.1: Alternatives Development 12.7.2: BMP Selection Process 12.7.2.3: Decision Factors: Cost (Table 12.7), Operability, Buildability, Environ., Public,… 12.7.2.4: Decision Analysis Methods: Cost/benefit ratios, matrix comparison, optimization,… Flooding in Santa Clara County before major watershed projects were built by the Santa Clara Valley Water District to increase the capacity of the county’s rivers and creeks during large storm events.