greg gearheart
TRANSCRIPT
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regulating our way to better creeks and streams
greg gearheart
stormwater program / swrcb
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Image from John Hannon, USDOI/BOR
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our mission
... is to preserve and enhance the
quality of ca’s water resources, and
ensure their proper allocation and
efficient use for the benefit of present
and future generations.
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growth
...happens
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Lodi
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growth
... is heading for the parts of our state
where headwater, ephemeral, and other “functionally
significant” waters lie waiting...
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but growth is not to blame.
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I blame it on the rain.
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Hydrologic Cycle
From Lake (2004)
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we focus on hydromodification
(ounce of prevention)
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hydromodification
• alteration of the hydrologic characteristics of waters, which in turn could cause degradation of water resources.
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After Lane (1955) as cited in Rosgen (1996)
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Increase in Bankfull Discharge
Ru
noff
Time
Pre-Development
Urbanization tends to increase storm water runoff:
peak flows
volume
frequency
Post-Develop.
From Haltiner (2006)
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hydromod
... can cause problems
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hardscaping our streams
... still happens?
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Could this happentoday?
(Chicken Ranch Slough, Sacramento County – Channelized in 1950's)
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1950's – Sacramento Area2000's – Sacramento Area
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replumbing watersheds and floodplains
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but we
... might have forgotten about the sediment side of the scales...
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and what about
... the watershed context of the project?
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and what about the floodplain?
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water boards nuts and bolts
• our regulatory actions (e.g., npdes permits, cwa 401 certs, wdrs, enforcement, etc.) rely on our water quality (wq) standards:– water quality standard is either
• beneficial use(s) + objectives; or
• water boards may “choose to prevent any degradation” to high quality waters = antidegradation
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beneficial uses used to protect california wetlands & streams
• AGR – agricultural supply
• FLD – flood peak attenuation/flood water storage
• FRSH – freshwater replenishment
• GWR – groundwater recharge
• MAR – marine habitat
• MUN – municipal and domestic supply
• RARE – preservation of rare and endangered species
• REC-1 – water contact recreation
• REC-2 – non-water contact recreation
• SHELL – shellfish harvesting
• SPAWN – fish spawning
• WARM – warm freshwater habitat
• WILD – wildlife habitat
• WQE – water quality enhancement
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beneficial uses and streams
• bus are:
– designated in the basin plans to a specific waterbody at a specific location
– are not easily translated to some key wetland/stream functions and values
– frequently it takes a suite of BUs to cover “wetland functions and values” (often includes gaps and overlaps)
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functional framework:regulatory tools
• landscape / watershed tool(s):
– storm water permits– ceqa ?
• waterbody tool(s):
– cwa 401 certifications– waste discharge requirements– waivers
• hybrid tools
– ms4 permits – gets at “local governments” and their processes
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