Dimensions - Winter 2015 - 2

deliver y

Protecting California's
Central Valley
Integrated LiDAR Data and Hydraulic
Modeling Developed for Massive Study Area
One of the richest agricultural regions in the world,

A New Standard for Floodplain Modeling

California's Central Valley spans more than 22,000 square

Working with prime contractor RBF Consulting,

miles. The region features multiple major watersheds and
the state's two largest rivers: the Sacramento and the San
Joaquin. California's state capital, Sacramento, and many
other cities are located along the banks of these two rivers,
which flow into the vast Bay Delta area and then out to the
Pacific Ocean through San Francisco Bay.

Mitigating Risk
Despite an extensive system of levees, weirs, and bypass
structures constructed over the past 150 years, the Central
Valley can experience devastating flooding during periods
of extremely high flows. In response to legislation requiring
the state to identify areas affected by the 100-year flood
event in non-urban areas and 200-year flood event in
urban and urbanizing areas, the California Department
of Water Resources (CA DWR) initiated the Central Valley
Floodplain Evaluation and Delineation (CVFED) project.
This massive project-the largest non-federal floodplain
mapping project undertaken in the U.S.-will help mitigate
flood risk by assessing the current level of flood protection
throughout the region, increasing public awareness, and
ultimately doubling the standard for flood protection for
urban and urbanizing areas.

New hydraulic models evaluate flood risk
and help in understanding how floods move
throughout the Central Valley of California.

2

Dimensions

®

Dewberry was tasked with developing base information
and models for the upper San Joaquin River region.
Dewberry was also responsible for integrating more than
2,500 square miles of LiDAR data for the topographic
base and modeling the hydraulics of the river system
using unsteady state HEC-RAS modeling for the riverine
sections and two-dimensional (FLO-2D) modeling of the
overland flow areas. The two methods were combined
for one seamless model for the study area. Multi-stage
floodplain evaluations, delineations, and floodplain
hazard work maps were then provided to meet the
state's requirements, as well as those of the U.S. Federal
Emergency Management Agency.
"The CVFED program provides the common building
blocks in terms of standards, methodologies, and tools
needed for floodplain assessments required by FloodSAFE
California's programs," says Ricardo Pineda, CA DWR,
FloodSAFE California program manager. "This program
will improve the level of flood protection and flood risk
communication throughout the Bay Delta region and the
whole Central Valley."



Dimensions - Winter 2015

Table of Contents for the Digital Edition of Dimensions - Winter 2015

In This Issue
Dimensions - Winter 2015 - Cover1
Dimensions - Winter 2015 - In This Issue
Dimensions - Winter 2015 - 1
Dimensions - Winter 2015 - 2
Dimensions - Winter 2015 - 3
Dimensions - Winter 2015 - 4
Dimensions - Winter 2015 - 5
Dimensions - Winter 2015 - 6
Dimensions - Winter 2015 - 7
Dimensions - Winter 2015 - 8
Dimensions - Winter 2015 - 9
Dimensions - Winter 2015 - 10
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2019winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2017
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2016
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2015
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2014
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014fall
https://www.nxtbook.com/nxtbooks/dewberry/Dewberry/dimensions_2014fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014spring
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012annualreview
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011annualreview
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011springsummer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2010fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2010summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20100102
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20091112
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090910
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2009summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090304
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090102
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20081112
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080910
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2008summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080304
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080102
https://www.nxtbookmedia.com