California Data Exchange CenterHydrologic Database System

webmaster@flood.water.ca.gov

http://cdec.water.ca.gov

http://cdec4gov.water.ca.gov

Objectives

• Collect and disseminate hydrologic and weather information

• Provide a centralized database for user access

• Provide an early flood warning system

Basic Uses of Database

• Early flood warning system

• Monitoring river levels

• Water supply forecasting

• Planning reservoir releases

• Monitor water quality in the Delta

• Recreational use of water ways

Essential Functions

HydrologicDatabase

Real-TimeData Collection

DataExchange

DataDissemination

Real-Time Data Collection

• Satellite transmissions from remote data stations (851 stations)

• Microwave radio transmissions from remote data stations (82 stations)

• Slowly phasing out microwave system due to cost and better accessibility to satellite transmissions

Data Exchange

• Electronic transfer of information between Federal, State and public agencies including National Weather Service, US Bureau of Reclamation, US Army Corps of Engineers

• Data from 279 stations are received and stored in centralized database

• Other information includes summary reports and real-time images

Data Dissemination

• Government and public access

• Internet Web Server – (http://cdec.water.ca.gov)

• Intranet Web Server – (http://cdec4gov.water.ca.gov)

• Ability to display data in various ways: plots, pictures, photos, maps, etc.

Data Dissemination

DatabaseManagement

WebsiteDevelopment

ApplicationDevelopment

DataAnalysis

Tabular Data

Graphs, Charts

Maps

Images, Photos

Internet

Water Supply Forecasting

River/Flood Forecasting

Flood Operations

Snow Pack Surveys

Future Enhancements

• Use of Java application development (JSP, Servlets, Applets)

• Viewing information using GIS presentation

• Website redesign using new web portal standards

• Exploring use of web services

Future Enhancements

• Comprehensive database for the Division of Flood Management that includes inventory of levees in California, annual levee inspections, documentation of flood control systems, levee system evaluations, flood damage identification, and levee erosion sites

Future Enhancements

• Forecasted coordinated operations with reservoir operators

GIS Presentation

CDEC Web Portal

Java Server Pages