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Service Description: The transition zones between our watersheds and the Bay are often occupied by flood control channels that provide a variety of societal and environmental services but often require sediment removal to maintain flood conveyance capacity. The causes of sedimentation problems in these channels are often complex, driven in large part by a combination of high watershed sediment yield and excess tidal sediment accumulation due to decreased tidal scour. Here we provide key information on the supply of sediment to major flood control channels around the Bay and the amount of sediment storage and removal over the past 50+ years. This is the first time this information has been collated and made readily available, and thus we provide new insights into a number of key questions:
-How much watershed sediment is delivered to each flood control channel?
-How variable is the watershed sediment load during different time periods?
-Where is watershed and tidal sediment being stored or removed from each flood control channel?
-How much, and at what frequency is sediment removed from each flood control channel?
This information is intended to help clarify the amount of sediment trapped in flood control channels that could be used to restore baylands and support long-term bayland resilience as sea level continues to rise.
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Copyright Text: San Francisco Estuary Institute 2016
Spatial Reference:
102100
(3857)
Single Fused Map Cache: false
Initial Extent:
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Spatial Reference:
102100
(3857)
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Spatial Reference:
102100
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Units: esriMeters
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Comments: The transition zones between our watersheds and the Bay are often occupied by flood control channels that provide a variety of societal and environmental services but often require sediment removal to maintain flood conveyance capacity. The causes of sedimentation problems in these channels are often complex, driven in large part by a combination of high watershed sediment yield and excess tidal sediment accumulation due to decreased tidal scour. Here we provide key information on the supply of sediment to major flood control channels around the Bay and the amount of sediment storage and removal over the past 50+ years. This is the first time this information has been collated and made readily available, and thus we provide new insights into a number of key questions:
-How much watershed sediment is delivered to each flood control channel?
-How variable is the watershed sediment load during different time periods?
-Where is watershed and tidal sediment being stored or removed from each flood control channel?
-How much, and at what frequency is sediment removed from each flood control channel?
This information is intended to help clarify the amount of sediment trapped in flood control channels that could be used to restore baylands and support long-term bayland resilience as sea level continues to rise.
Subject: This dataset includes locations of the head of tide in major San Francisco Bay Area creeks, information on the supply of sediment to major flood control channels around the Bay and the amount of sediment storage and removal over the past 50+ years.
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Keywords: creek,sediment,San Francisco,Bay,tide
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Supported Query Formats: JSON, AMF
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