ESM202_Lec17_catchments08

ESM202_Lec17_catchments08 - Nutrient fluxes from coastal...

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Unformatted text preview: Nutrient fluxes from coastal California catchments with suburban development Santa Barbara Channel Santa Barbara Channel LTER LTER Linking catchments to coastal waters Objectives Examine episodic, seasonal and interannual aspects of fluvial fluxes in catchments with suburban development along the coast of central California Comparison to agricultural and chaparral catchments Coastal catchments of Santa Barbara Channel - New ~ S a n ta B a rb a ra C h a n n e l ~ Los Angeles, CA Gaviota Arroyo Burro Refugio Arroyo Hondo El Capitan Mission Santa Monica Franklin Carpinteria Rincon City of Santa Barbara, CA ~ S a n t a B a r b a r a C h a n n e l ~ Bell San Onofre Devereux Tecolotito Atascadero Los Carneros 20 40 60 80 100 Gaviota Arroyo Hondo Refugio El Capitan Arroyo Burro Mission Santa Monica Franklin Carpinteria Rincon Percent Land Use Urban Agricultural Forested Shrub/Brush Range From West to East Land use among catchments Sub-Watershed Scale ID Area (km 2 ) Elev (m) Slope (%) Relief (m) Impervious (%) 1 7.2 710 46 1031 2 2 5.7 761 43 875 3 16.9 620 40 1080 6 4 21.8 503 33 1105 11 5 30.0 382 26 1150 16 20 40 60 80 100 1 2 3 4 5 Subwatershed Identification Number Percent Land Use Urban Agricultural Forested Shrub/Brush Short streams + steep terrain + easily eroded rock and soil = flashy stormflow with lots of sediment Hydrological and hydrochemical measurements Stage and temperature (continuous) Nitrate, ammonium, phosphate, dissolved nitrogen (weekly and event) Mo Mediteranean climate: Almost all the rainfall occurs during 3 winter months More than half of a years flow can occur during one storm in less than 24 hrs. re than half of a years flow can occur during one storm in less than 24 hrs. 10 20 30 40 50 1-Oct 30-Nov 30-Jan 31-Mar 31-May 30-Jul 29-Sep flow (m 3 /s) Arroyo Burro Water Year 2001 5 10 15 24-Feb 25-Feb 26-Feb 27-Feb 28-Feb nitrate (mg/L) 1 2 3 4 conductivity (mS/cm) phosphate (mg/L) nitrate flow conductivity phosphate Single storm hydrograph and solute variations Single storm hydrograph and solute variations 50...
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This note was uploaded on 08/06/2008 for the course ESM 202 taught by Professor Keller during the Winter '08 term at UCSB.

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ESM202_Lec17_catchments08 - Nutrient fluxes from coastal...

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