SOUTHERN CALIFORNIA Regional Hydrology IMPACTS ON REGULATORY APPROACHES FOR THE FUTURE. Monitoring & Modeling

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1 SOUTHERN CALIFORNIA Regional Hydrology IMPACTS ON REGULATORY APPROACHES FOR THE FUTURE Monitoring & Modeling

2 Summary This region provides a unique combination of policy issues, water quality problems, advanced technology infrastructure and multi-disciplinary scientific expertise On-going, collaborative research in this diverse range of watersheds provides an opportunity to develop a reference baseline for differently developed and managed watersheds for future management and policy

3 Collaborative Research Team UCSD SDSU Dr. Lihini Aluwihare Pablo J. Bryant Dr. Dan Cayan Dr. Claudia Luke Dr. Michael Dettinger Sedra Shapiro Dr. K. Georgakakos Mark Van Scoy Dr. John Helly Dr. John Largier

4 Initial Funding Provided by National Science Foundation San Diego Supercomputer Center High-Performance Wireless Education and Research Network (HPWREN) ROADNET County of San Diego Board of Supervisors Department of Environmental Health

5 Integrated Urban Hydrology

6 Research Goal Measure, analyze, understand the Southern California region as an integrated hydrological system across air, land, sea and, uniquely, the coast comprised of naturally occurring and engineered components Supporting science and regulatory interests for the future Starting with three watersheds in the San Diego region

7 Southern California has the most variable precipitation in the US Coefficient of variation for seasonal mean precipitation > 50% Partly due to the short time that the seasonal rain "window" is open Consequently, streams are very flashy and also they have a remarkable ENSO signal

8

9 Two most challenging problems in urban hydrology today are quantifying highly variable spatial distribution of precipitation at watershed scales response of urban watersheds in both their engineered and natural components

10 Urban watersheds contain large areas of impervious or near impervious surface co-mingle the natural and engineered drainage systems combining ravines, rivers, creeks and gullies with sewers, storm drains, levees, pumps and detention ponds. Jointly respond to storm events but are operated, managed, modified, and regulated as independent systems

11 Water Moves Across Scales Global Regional Local

12 Regional Atmospheric Air Masses Atmospheric Water Vapor in the Region from GOES 8

13 Regional Coastal Water Masses San Diego Bay San Diego Bay General Coastal Circulation Reflected in Sea Surface Temperature

14 Stormwater Loads

15 Representative Engineered Systems

16

17 Point and Non-Point Sources Recognized by Statute in US POINT SOURCES Wastewater effluent Runoff and leachate from waste disposal sites, animal feed lots, mines, oil fields, unsewered industrial sites Storm sewer outfalls from cities w/pop. > 100,000 Runoff from construction sites > 2 hectares Overflows of combined storm and sanitary sewers NONPOINT SOURCES Runoff from agriculture(incl. Irrigation return), pasture and range, urban (sewered and unsewered) w/pop. > 100,000 Septic leachate and runoff from failed septic systems Runoff from construction sites < 2 hectares Runoff from abandoned mines Atmospheric deposition over water surface Land-based activities generating contaminants (logging, wetland conversion, construction & development of land or waterways) from Carpenter et al, Issues in Ecology, Summer 1998

18 Erosion and Sediment Transport Nitrogen & Phosphorus Contamination Impacts on nutrient cycles Coastal plankton populations

19 TMDL: Impaired Waters in San Diego

20 Management Information Needs Where are contaminants coming from and where are they going? How much? How fast? How often?

21 How do we quantify this information?

22 Monitoring and Modeling Long-term, regional monitoring systems Modeling of natural and engineered systems Decision support analyses for resource management

23 San Diego Watersheds Santa Margarita River Relatively pristine Camp Pendleton represents federal interests San Diego River Highly urbanized Impinges Mission Bay Tijuana River Relatively unmanaged Impinges South Bay and north to at least Point Loma

24 Santa Margarita San Diego Tijuana

25 Current Research in These Watersheds Santa Margarita River Wireless monitoring systems using HPWREN (High Performance Wireless Research and Education Network) Hydrology, water quality, meteorology Spatial variability in precipitation using unique radar systems San Diego River Mission Bay monitoring and modeling Tijuana River South Bay CODAR Coastal water quality sampling

26 Monitoring

27 HPWREN connected topology agenda May 2002 Santa Margarita Ecological Reserve Pala Indian Res. Pauma Indian Res. Palomar Observatory Rincon Indian Res. San Pasqual Indian Res. La Jolla Indian Res. Mesa Grande Indian Res. Los Coyotes Indian Res. Santa Ysabel Indian Res. Mt. Laguna Observatory Backbone/relay node Science site Researcher location Education site Incident mgmt. site UCSD/SDSC SIO Scripps Pier

28 SMER Network Topology

29 High resolution still camera at SMER

30 Remote Sensing of Flow via Imagery - Image processing - Algorithm development

31 Water Quality and Quantity Sensors Developed through collaboration of StructureMetrix (nee StrainGauge) Systems San Diego Supercomputer Center HPWREN SDSU Santa Margarita Ecological Reserve StructureMetrix Funded by NGI Program State of California Office of Technology via CommerceNet

32 HydroMetriX small, completely self-contained system provides hydrological data from nearly any flowing water source, ranging from rivers and streams to enclosed storm drains. basic system measures flow velocity, water depth, and water temperature. data may be acquired at programmable intervals ranging from every 5 seconds to once every 10 minutes.

33 Wireless Real-time Flow Measurement

34 Modeling

35 Los Penasquitos Watershed Del Mar Pacific Ocean Torrey Pines

36 Color-code Elevation Data

37 Delineate Basins

38 Compute Routing

39 Overlay With Imagery DOQQ Courtesy of SANDAG

40 Pervious/Impervious Area Estimation Using Image Classification

41 Compute Intersection of Delineated Watershed and Image Mask Image subset

42 Analyze sub-basins Jointly or Independently

43 Santa Margarita River Location San Diego River Communication Instrumentation Computation

44 Summary This region provides a unique combination of policy issues, water quality problems, advanced technology infrastructure and multi-disciplinary scientific expertise On-going, collaborative research in this diverse range of watersheds provides an opportunity to develop a reference baseline for differently developed and managed watersheds for future management and policy

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