Improved Understanding Of The Climatic And Anthropogenic Drivers Of Groundwater Depletion And Recovery In Californias Central Valley PDF Download
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Author | : Sarfaraz Alam |
Publisher | : |
Total Pages | : 182 |
Release | : 2021 |
Genre | : |
ISBN | : |
Download Improved Understanding of the Climatic and Anthropogenic Drivers of Groundwater Depletion and Recovery in California's Central Valley Book in PDF, ePub and Kindle
The role of climatic and anthropogenic drivers in groundwater storage depletion and recovery in California's Central Valley has been investigated. Specifically, the dissertation addresses three research questions: (1) How does climate change impact the groundwater storage? (2) Can managed aquifer recharge (MAR) mitigate groundwater overdraft? (3) How much of the drought-caused groundwater overdraft in Central Valley has recovered during the post-drought years and what is the role of climate and water management in the fast versus slow post-drought overdraft recovery? In the first part of the dissertation, integrated hydrologic models have been simulated to predict future groundwater storage changes under multiple climate change scenarios and to evaluate the relative contribution of crop water use and surface water inflow to Central Valley regions. It is shown that climate change will accelerate groundwater depletion in the future and an increase in future crop water use will be the dominant cause of future groundwater decline without mitigation measure. In the second part, the impact of large-scale MAR implementation on groundwater overdraft recovery, flood peak, and low flow have been investigated via numerical experiments. It is shown that MAR has limited capacity to recovery historical groundwater overdraft due to lack of surface water availability in the southern Central Valley (i.e., San Joaquin and Tulare regions). Delivering excess surface water from the delta to the Tulare and San Joaquin region can significantly solve the groundwater overdraft problem. Moreover, MAR can reduce flood peaks, and increase dry season flow. Finally, an ensemble of groundwater storage change estimates has been made using multiple methods and numerical experiments conducted to understand the role of climate and water management to recover drought-caused groundwater overdraft during post-drought years. The result shows that the Central Valley aquifer is not resilient to drought under existing conditions, and it is very challenging to recover drought-caused groundwater overdraft. However, water management measures that restrict groundwater extraction can significantly reduce the groundwater overdraft recovery time.
Author | : Alex K. Williamson |
Publisher | : |
Total Pages | : 158 |
Release | : 1989 |
Genre | : Groundwater |
ISBN | : |
Download Ground-water Flow in the Central Valley, California Book in PDF, ePub and Kindle
Author | : G. L. Bertoldi |
Publisher | : |
Total Pages | : 56 |
Release | : 1991 |
Genre | : Groundwater |
ISBN | : |
Download Ground Water in the Central Valley, California Book in PDF, ePub and Kindle
See journals under US Geological survey. Prof. paper 1401-A.
Author | : |
Publisher | : |
Total Pages | : 150 |
Release | : 1994 |
Genre | : Central Valley (Calif.) |
ISBN | : |
Download Central Valley Project Improvement Act Programmatic Environmental Impact Statement Book in PDF, ePub and Kindle
Author | : Betsy A. Cody |
Publisher | : DIANE Publishing |
Total Pages | : 31 |
Release | : 2010-10 |
Genre | : Technology & Engineering |
ISBN | : 1437927572 |
Download California Drought Book in PDF, ePub and Kindle
California experienced severe water supply shortages in 2009, which led to economic disruption across the state, incl. losses in agricultural areas in the western portion of the Central Valley ¿ areas already experiencing declines in the housing industry and the economic downturn in general. At the same time, several fish species whose habitat lie at the heart of California¿s water supply system and throughout its northern rivers are in decline and some face the possibility of extinction. This situation too has had economic implications, resulting in job and income losses in northern California. Contents of this report: (1) Intro.; (2) What is Drought?; (3) Drought in California; (4) Regulatory Restrictions Affecting Water Deliveries; (5) California Water Rights. Illus.
Author | : Ellen Hanak |
Publisher | : Public Policy Instit. of CA |
Total Pages | : 500 |
Release | : 2011 |
Genre | : Business & Economics |
ISBN | : 1582131414 |
Download Managing California's Water Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 4 |
Release | : 2009 |
Genre | : Central Valley (Calif. : Valley) |
ISBN | : |
Download California's Central Valley Groundwater Study Book in PDF, ePub and Kindle
Author | : G. L. Bertoldi |
Publisher | : |
Total Pages | : 44 |
Release | : 1991 |
Genre | : Aquifers |
ISBN | : |
Download Ground Water in the Central Valley, California Book in PDF, ePub and Kindle
Author | : Alex K. Williamson |
Publisher | : |
Total Pages | : 127 |
Release | : 1987 |
Genre | : Groundwater flow |
ISBN | : |
Download Ground-water Flow in the Central Valley, California Book in PDF, ePub and Kindle
Author | : Darren L. Ficklin |
Publisher | : |
Total Pages | : |
Release | : 2010 |
Genre | : Agricultural pollution |
ISBN | : 9781124508566 |
Download Modeling the Impacts of Climate Change on Hydrology and Agricultural Pollutant Runoff in California's Central Valley Book in PDF, ePub and Kindle
The Soil and Water Assessment Tool (SWAT) and HYDRUS were used to assess the impact of climate change on the hydrologic cycle (streamflow, surface runoff, groundwater recharge, evapotranspiration, and irrigation water use) and agricultural pollutant runoff (sediment, nitrate, phosphorus, chlorpyrifos, and diazinon) in the Sacramento and San Joaquin River watersheds in California's Central Valley. Five separate studies were constructed. For the first three studies, hydrological responses were modeled in the San Joaquin River watershed using variations of atmospheric CO2 (550 and 970 ppm), temperature (+1.1 and +6.4°C), and precipitation (0%, ±10%, and ±20%) based on Intergovernmental Panel on Climate Change projections. The fourth study used a calibration and an uncertainty analysis technique for the calibration of the Sacramento River watershed. This study confirmed that SWAT was able to capture the large amount of uncertainty within the Sacramento River watershed and successfully simulate streamflow, sediment, nitrate, chlorpyrifos and diazinon loads. The final study used a novel stochastic climate change analysis technique to bracket the 95% confidence interval of potential climate changes. For all studies, increases in precipitation generally changed the hydrological cycle and agricultural runoff proportionally, where increases in precipitation resulted in increases in surface runoff and thus agricultural runoff and vice-versa. Also, for all studies, increasing temperature caused a temporal shift in plant growth patterns and redistributed evapotranspiration and irrigation water demand earlier in the year. Increasing atmospheric CO2 resulted in watershed-wide decreases in evapotranspiration, therefore increasing water yield and streamflow while concurrently decreasing irrigation water use. This research improves the understanding between climate change and hydrology and agricultural pollutant runoff within the Central Valley of California. Theses climate change analyses may be used by water resource managers to evaluate the potential effects of climate change.