Suisun Marsh Plan-Chap 5
Chapter 5 Physical Environment This chapter provides environmental analyses relative to physical parameters of the project area. Components of this study include a setting discussion, impact analysis criteria, project effects and significance, and applicable mitigation measures. This chapter is organized as follows: Section 5.1, “Water Supply, Hydrology, and Delta Water Management”; Section 5.2, “Water Quality”; Section 5.3, “Geology and Groundwater”; Section 5.4, “Flood Control and Levee Stability”; Section 5.5, “Sediment Transport”; Section 5.6, “Transportation and Navigation”; Section 5.7, “Air Quality”; Section 5.8, “Noise”; and Section 5.9; “Climate Change.” Suisun Marsh Habitat Management, November 2011 Preservation, and Restoration Plan 5-1 Final EIS/EIR ICF 06888.06 Section 5.1 Water Supply, Hydrology, and Delta Water Management Introduction This section describes the existing environmental conditions and the consequences of implementing the SMP alternatives on water supply, hydrology, and Delta water management. Delta water management for agriculture, water supply diversions, and exports and the salinity of water diverted for waterfowl habitat in the managed wetlands of the Marsh officially became linked in the 1978 State Water Board Delta Water Control Plan and the water right decision (D-1485) Suisun Marsh salinity standards (objectives). D-1485 required DWR and Reclamation to prepare a plan to protect the beneficial use of water for fish and wildlife and meet salinity standards for the Marsh. Initial facilities included improved RRDS facilities to supply approximately 5,000 acres on Simmons, Hammond, Van Sickle, Wheeler, and Grizzly Islands with lower salinity water from Montezuma Slough, and the MIDS and Goodyear Slough outfall to improve supply of lower salinity water for the southwestern Marsh.
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