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Web-Based GIS for Sediment TMDL Implementation in the Imperial Valley, California University of Redlands The Redlands Institute Serene Ong Nate Strout Project Objectives and Process Presentation Overview Review Preliminary GIS Database Review prototype web-based tools Imperial Valley – Geographic Context Los Angeles Arizona California Palm Springs Salton Sea Colorado River San Diego U.S. Mexico Calexico Mexicali Tijuana Pacific Ocean Gulf of California Watershed Assessment •6,257 fields •1,406 miles of drainage channels •175 drain discharge points •100 miles of river Whitewater River 7% Other inflow 1% •500 square miles of surface area of the Salton Sea (326,000 acres) •No outlet from the Salton Sea •State implemented TMDL for TSS of 200 mg/L in 2001/02 Alamo River 45% Rainfall 3% Agricultural Drains 8% Agricultural runoff New River 32% Groundwater 4% Urban runoff Stakeholders • State Water Resources Control Board (SWRCB) • Regional Water Quality Control Board (RWQCB) • Imperial Irrigation District (IID) • Imperial County Farm Bureau (ICFB) • Communities and wildlife around Imperial Valley and Salton Sea Project Objectives •Support SWRCB, RWQCB, IID and ICFB with sediment TMDL implementation and compliance. •Provide better access to water quality and farm practices data. •Develop GIS database and web map application, custom query and report tools Anticipated Outcomes •More efficient use of existing information •Increased use of monitoring and related data for TMDL management/research •Standard methods for collecting, formatting and reporting water quality related data •Incorporate data from various agencies Database Design Objectives •Comply with the State Water Resources Control Board (SWRCB) Surface Water Ambient Monitoring Program (SWAMP) standards •Support analysis and reporting requirements Database Development Process • • • • • • • • • • • Bureau of Reclamation Department of Pesticide Regulation California Department of Water Resources State Water Resources Control Board Imperial County Agricultural Commission Imperial County Farm Bureau Imperial Irrigation District International Boundary and Waters Commission Regional Water Quality Control Boards (3, 5, 7) Salton Sea Authority University of California Davis Cooperative Extension Stakeholder Survey Database Development Process – Data Sources Stakeholder Survey Data Inventory and Assessment Over 300 Unique Datasets Identified Database Development Process Stakeholder Survey Sample Frequency Sample Method Type Subtype Constituent/Parameter Field Name Units Water extract Hydrologic Flow Flow Value_ cubic feet/sec Location Daily Border Daily Border Start Date 1943 Water extract Hydrologic Water Flow Alamo at Inatl Boundary in cubic m/scubic m/s Water extract Hydrologic Water Flow New at Inatl Boundary in cubic m/s cubic m/s Water extract Hydrologic Flow Discharged Discharged Water extract Hydrologic Flow Flow (Monthly sum) Monthly_Fl Water extract Physical/Chemical Other Accute Toxicity Accute_Tox Varies Water extract Physical/Chemical General Alkalinity Alkalinity Varies Salton Sea Water extract Physical/Chemical Nutrients Ammonia Ammonia Varies Salton Sea Water extract Organisms Bacterial Antero-cocci Antero_Coc Varies Salton Sea Water extract Organisms Other Other Biology Bio_Other Varies Salton Sea Water extract Physical/Chemical Other Biochemical Oxygen Demand BOD Varies Salton Sea Bot_Sed Varies cubic feet/sec End Date 2004 Years Records 62 Features 56606 Reformatting data for GIS 1947 2003 57 20576 4 1 1947 2003 57 20576 1 Salton Sea 1994 2005 12 4281 38 Salton Sea 1994 2005 12 4281 38 Salton Sea 1945 2000 55 1222 1222 1945 2000 55 1222 1222 1945 2000 55 1222 1222 1945 2000 55 1222 1222 1945 2000 55 1222 1222 1945 2000 55 1222 1222 Salton Sea 1945 2000 55 1222 1222 Coding flow direction Water extract Pesticides Carbamates Carbamates Varies Salton Sea 1945 2000 55 1222 1222 Water extract Pesticides Chlorinated Herbicides Chlor_Herb Varies Salton Sea 1945 2000 55 1222 1222 Water extract Physical/Chemical Other Chronic Toxicity Chronic_TO Varies Salton Sea 1945 2000 55 1222 1222 Water extract Physical/Chemical General Water color Color Varies Salton Sea 1945 2000 55 1222 1222 Water extract Physical/Chemical Other Dissolved Carbon Dis_Carbon Varies Salton Sea 1945 2000 55 1222 1222 Fixing errors in spatial data Water quality data index Creating basic metadata Data Inventory and Assessment Data Compilation/ Conversion Database Development Process Conceptual Database Schema Stakeholder Survey Data Inventory and Assessment Data Compilation/ Conversion Database Design/ Development Making a Database Compliant • Obtain the data • Process the data – Code flow direction, map field names and data types to SWAMP standard fields and data types • Crosswalk data from various tables • Include all required SWAMP tables and fields • Create links and relationships among tables Schema diagram Cadastral Owner Operator Agricultural Practices Hydrology Network Features Water Quality Analysis Database Development Process Stakeholder Survey Load Duration Curves Data Inventory and Assessment Time Series Animations Data Compilation/ Conversion TSS and Turbidity Trends Database Design/ Development GIS Database Poster Analysis and Visualization Products Statistical analysis of BMP-TSS relationships GIS Database Orientation Hydrology Features • Schema based on NHD • Compilation of Imperial Irrigation District (IID) and NHD linework • Rivers • Canals • Drains • Flow Direction Agricultural Features • Gates – Inflow point • Tailwater Boxes – Runoff point to drain • Plot delineation – Land fed by a single gate Monitoring Stations • Location Sources: – RWQCB:Region 7 – SWAMP – Imperial Irrigation District (IID) – USGS (flow) Drainsheds • Collection of plots monitored by a single RWQCB water quality monitoring station Agricultural Practice Information • Reported by farmers to Imperial County Farm Bureau under the ICFB Voluntary TMDL Compliance Program – – – – – Owner & operator information Best Management Practices (BMPs) Crop types NPS problems Site conditions For more information on the TMDL Compliance Program please visit http://www.ivtmdl.com/ Demo of Web-based GIS and reporting tools http://www.institute.redlands.edu/ivsdi Technical Details: •Application developed using ArcGIS Server.NET Web ADF 9.2 •Data stored in ArcSDE 9.2 on SQL Server 2005 *This is a Beta application Next Steps Process for data update and maintenance Policies for data sharing/ reporting and security Feedback and refinement of draft GIS Web-GIS deployment/ testing Web-based GIS and TMDL analysis tools Training and hand-over to long-term steward Document future data and analysis needs Outreach/ training materials Thank you http://www.institute.redlands.edu/ivsdi Serene Ong [email protected] Nathan Strout [email protected]
