Clean Watersheds Needs Survey 2012

U.S. Environmental Protection Agency (EPA) | December 13th, 2012

Climate Adaptation Master Plan for Water (CAMP4W)

Metropolitan Water District of Southern California (MWD) | March 26th, 2025

To ensure the continued reliability of water supplies for the communities we serve, Metropolitan embarked on the development of a comprehensive Climate Adaptati

To ensure the continued reliability of water supplies for the communities we serve, Metropolitan embarked on the development of a comprehensive Climate Adaptation Master Plan for Water (CAMP4W), a comprehensive set of policy directives and decision-making tools that ensure the Board of Directors is equipped to consider climate risks to water supplies, water quality, infrastructure, operations, workforce, public health, and financial sustainability to its deliberations and investment decisions. It provides a roadmap to guide future investments and decision-making as we confront our new climate reality in the years and decades ahead.

Climate change risks to US infrastructure: impacts on roads, bridges, coastal development, and urban drainage

American Meteorological Society (AMS) | January 23rd, 2014

Changes in temperature, precipitation, sea level, and coastal storms will likely increase the vulnerability of infrastructure across the United States. Using four

Changes in temperature, precipitation, sea level, and coastal storms will likely increase the vulnerability of infrastructure across the United States. Using four models that analyze vulnerability, impacts, and adaptation, this paper estimates impacts to roads, bridges, coastal properties, and urban drainage infrastructure and investigates sensitivity to varying greenhouse gas emission scenarios, climate sensitivities, and global climate models. The results suggest that the impacts of climate change in this sector could be large, especially in the second half of the 21st century as sea-level rises, temperature increases, and precipitation patterns become more extreme and affect the sustainability of long-lived infrastructure. Further, when considering sea-level rise, scenarios which incorporate dynamic ice sheet melting yield impact model results in coastal areas that are roughly 70 to 80 % higher than results that do not incorporate dynamic ice sheet melting. The potential for substantial economic impacts across all infrastructure sectors modeled, however, can be reduced by cost-effective adaptation measures. Mitigation policies also show potential to reduce impacts in the infrastructure sector – a more aggressive mitigation policy reduces impacts by 25 to 35 %, and a somewhat less aggressive policy reduces impacts by 19 to 30 %. The existing suite of models suitable for estimating these damages nonetheless covers only a small portion of expected infrastructure sector effects from climate change, so much work remains to better understand impacts on electric and telecommunications networks, rail, and air transportation systems. In addition, the effects of climate-induced extreme events are likely to be important, but are incompletely understood and remain an emerging area for research.

Climate Warming and Water Management Adaptation for California

Climatic Change (Springer) | June 10th, 2010

The ability of California’s water supply system to adapt to long-term climatic and demographic changes is examined. Two climate warming and a historical climate

The ability of California’s water supply system to adapt to long-term climatic and demographic changes is examined. Two climate warming and a historical climate scenario are examined with population and land use estimates for the year 2100 using a statewide economic-engineering optimization model of water supply management. Methodologically, the results of this analysis indicate that for long-term climate change studies of complex systems, there is considerable value in including other major changes expected during a long-term time-frame (such as population changes), allowing the system to adapt to changes in conditions (a common feature of human societies), and representing the system in sufficient hydrologic and operational detail and breadth to allow significant adaptation. While the policy results of this study are preliminary, they point to a considerable engineering and economic ability of complex, diverse, and intertied systems to adapt to significant changes in climate and population. More specifically, California’s water supply system appears physically capable of adapting to significant changes in climate and population, albeit at a significant cost. Such adaptation would entail large changes in the operation of California’s large groundwater storage capacity, significant transfers of water among water users, and some adoption of new technologies.

Climate-informed hydrologic modeling and policy typology to guide managed aquifer recharge

American Association for the Advancement of Science (AAAS) | April 21st, 2021

Harvesting floodwaters to recharge depleted groundwater aquifers can simultaneously reduce flood and drought risks and enhance groundwater sustainability. However, deploy

Harvesting floodwaters to recharge depleted groundwater aquifers can simultaneously reduce flood and drought risks and enhance groundwater sustainability. However, deployment of this multibeneficial adaptation option is fundamentally constrained by how much water is available for recharge (WAFR) at present and under future climate change. Here, we develop a climate-informed and policy-relevant framework to quantify WAFR, its uncertainty, and associated policy actions. Despite robust and widespread increases in future projected WAFR in our case study of California (for 56/80% of subbasins in 2070–2099 under RCP4.5/RCP8.5), strong nonlinear interactions between diversion infrastructure and policy uncertainties constrain how much WAFR can be captured. To tap future elevated recharge potential through infrastructure expansion under deep uncertainties, we outline a novel robustness-based policy typology to identify priority areas of investment needs. Our WAFR analysis can inform effective investment decisions to adapt to future climate-fueled drought and flood risk over depleted aquifers, in California and beyond.

Colorado River Aqueduct Recording Project 1998

National Park Service (NPS) | December 15th, 1988

The Colorado River Aqueduct Recording Project is part of the Historic American Engineering Record (HAER), a long-range program that documents historically-significant eng

The Colorado River Aqueduct Recording Project is part of the Historic American Engineering Record (HAER), a long-range program that documents historically-significant engineering, industrial, and maritime sites In the United States. The HAER program is administered by the Historic American Buildings Survey / Historic American Engineering Record (HABS/HAER) Division of the National Park Service. U.S. Department of the Interior. The recording project was co-sponsored during the summer of 1998 by HABS/HAER under the general direction of E. Blaine Oliver, Chief; and by the Metropolitan Water District of Southern California, Gary M. Snyder, Chief Engineer, and Wally M. Lieu, Assistant Chief Engineer. The measured drawings, historical report, and photographs were prepared under the direction of Eric N. DeLony, Chief of HAER, The recording team included Supervisory Architect Andrew Johnston (University of California, Berkeley) and architects Chrysti Chun (Illinois Institute of Technology), Imola Klrlzsa'n (ICOMOS, Romania), Sydney Mainster (University of California, Berkeley), Elizabeth Mllnarik (University of Illinois, Urbana-Champaign), and Nina Shatberashvili (ICOMOS, Republic of Georgia); Project Historian J. Philip Gruen (University of California, Berkeley); and photographer Jet Lowe (Washington, D. C.) Additional drawings were provided by architects Christopher B. Brown (University of Washington) and Adrim Maksay (Transylvania Trust Foundation, Romania). Engineer Allien Whitsett (Metropolitan Water District of Southern California) provided consultation and advice. Devon Kobayashi (Metropolitan Water District of Southern California) served as HAER liaison.

Colorado River Aqueduct Route Selected for Metropolitan Water District Requires Pumping

Civil Engineering | February 10th, 1931

Colorado River Aqueduct, Historic American Engineering Record

National Park Service (NPS) | August 1st, 1998

The Colorado River Aqueduct pumps water from the Colorado River through, over, and across mountains and desert in a 242- mile-longmarchtothecoastalplainofSouthernCaliforn

The Colorado River Aqueduct pumps water from the Colorado River through, over, and across mountains and desert in a 242- mile-longmarchtothecoastalplainofSouthernCalifornia. When completed,itwasoneofthelongestwater-conveyancefacilitiesin the world. The aqueduct includes power lines, tunnels, siphons, covered conduits, open canals, dams, reservoirs, and five pumping plants, involving ingenious engineering solutions and newly- introduced construction equipment. The project also employed over 35,000 people during its eight-year span and as many as 10,000 at one time, making it southern California's single-largest work opportunity during the Great Depression. In 1995, the Colorado River Aqueduct was named a National Historic Civil Engineering Landmark by the American Society of Civil Engineers. Today, it is the major water supply for urban and suburban southern California.

Colorado River Storage Project of 1956

U.S. Bureau of Reclamation (USBR) | April 11th, 1956

Complete Report on Construction of the Los Angeles Aqueduct

City of Los Angeles | January 15th, 1916