California Water Science Center

Groundwater

Filter Total Items: 90
Date published: February 27, 2019
Status: Active

SGMApy: An open source platform for computing sustainability metrics and visualizing MODFLOW data

Climate change and demographic changes have underscored the need to improve effectiveness of managing valuable water resources for sustainability. In 2014, the Sustainable Groundwater Management Act (SGMA) established a framework for sustainable, local groundwater management. SGMA requires groundwater-dependent regions to halt overdraft and bring basins into balanced levels of pumping and...

Date published: February 26, 2019
Status: Active

Pajaro Valley Hydrologic Model Update, Data Collection, and Analysis for Sustainability

The Pajaro Valley is home to a billion-dollar agricultural industry, providing food and food processing services for the nation. The water for these enterprises is supplied, in large part, by the groundwater resources (aquifers) in the area. The Pajaro Valley Water Management Agency (PV Water) and the USGS have partnered to improve aquifer monitoring software, allowing better quantification...

Date published: February 4, 2019
Status: Completed

Using the Basin Characterization Model (BCM) to Estimate Natural Recharge in Indian Wells Valley, California

Located in the northern Mojave Desert, the Indian Wells Valley has an arid environment, receiving only 4-6 inches of precipitation annually. Like most desert areas, Indian Wells Valley communities rely mostly on groundwater for their available groundwater supply. Increases in urban and agricultural development have resulted in increased groundwater pumpage for public and agricultural use,...

Contacts: Dina Saleh
Date published: January 31, 2019
Status: Completed

Climate and Natural Resources Analysis and Planning for California's Northern Coast

The North Coast Resource Partnership (NCRP) is an innovative, stakeholder-driven collaboration among local government, Tribes, watershed groups, and interested partners in the North Coast region of California. The North Coast comprises seven counties, Tribal lands, major watersheds, and a planning area of 19,390 square miles representing 12% of California's landscape. The NCRP integrates long-...

Date published: January 30, 2019
Status: Completed

Cuyama Valley Water Availability Study

Currently, groundwater is the only source for domestic, agricultural and municipal water use in the Cuyama Valley groundwater basin in Santa Barbara County, California. Groundwater withdrawals, mainly to irrigate agricultural crops, have resulted in water-level declines of as much as 300 feet in the area since the 1940s. To plan for sustainable future use of the groundwater, the U.S....

Contacts: Claudia C Faunt
Date published: January 28, 2019
Status: Completed

Borrego Valley Groundwater Conditions

Groundwater is effectively the sole source of water supply for Borrego Valley, California. By the mid-2000s, agriculture, recreation (predominantly golf courses), municipal uses, and the Anza-Borrego Desert State Park required about four times more water than is available through natural recharge. As a result, the U.S. Geological Survey began a cooperative study of the Borrego Valley with the...

Date published: December 29, 2018
Status: Active

Developing a Dynamic SPARROW Model to Evaluate Nutrient Loads, Sources, and Transport to the Upper Klamath Lake, USA

Phosphorous (P) and Nitrogen (N) loading from various sources of water to the Upper Klamath Lake (UKL) are important and potentially controllable factors for the hyper eutrophication of the lake. A total maximum daily load plan (TMDL) has been in place for over a decade to reduce the level of eutrophication and...

Date published: December 21, 2018
Status: Active

Salinas Valley Operational Model: Interlake Tunnel and San Antonio Spillway Modification Project

An operational model for Salinas Valley is needed to evaluate and compare ecosystem, conservation, and water demands. This model must simulate current operations, assess benefits of and evaluate scenarios for tunnel operation and potential reservoir and spillway modifications.

Contacts: Wesley Henson, Ph.D., Howard Franklin, Amy Woodrow
Date published: December 20, 2018
Status: Completed

Owens Valley Hydrogeology

The Owens Valley, a long, narrow valley along the east side of the Sierra Nevada in east-central California, is the main source of water for the city of Los Angeles. The city diverts most of the surface water in the valley into the Owens River-Los Angeles Aqueduct system, which transports the water more than 200 miles south to areas of distribution and use. Additionally, ground water is pumped...

Date published: December 20, 2018
Status: Active

Sustainable Groundwater Management

In 2014, the State of California adopted historic legislation to help manage its groundwater, the Sustainable Groundwater Management Act (SGMA) . According to the act, local Groundwater Sustainability Agencies (GSAs) must be formed for all...

Contacts: Claudia C Faunt
Date published: December 20, 2018
Status: Active

California's Central Valley

Competition for water resources is growing throughout California, particularly in the Central Valley. The Central Valley's population is expected to increase to 6 million by 2020. This population growth, along with anticipated reductions in Colorado River water deliveries, drought, and the ecological crisis in the Sacramento-San Joaquin Delta, have created an intense demand for water. The...

Contacts: Claudia C Faunt
Date published: December 19, 2018
Status: Active

California Drought

The USGS closely monitors the effects of drought through data collection and research. USGS science supports water managers in preparing for possible future drought by providing information that takes into account long-term hydrologic, climatic, and environmental changes. These studies support successful planning and science-based decision-making by water managers who must address complex...