Reliable Groundwater Production
Our expertise comes from practical, hands-on experience designing and working on more than 1,000 municipal, high capacity water wells. We also design and supervise well construction for municipal and private clients and are often called upon to help increase water production efficiency and troubleshoot and test existing wells for water quality and other issues. Our team helps agencies assess and manage well infrastructure to prolong well life, minimize long term expenses, and improve water supply reliability.
- Well siting and specifications
- Well operation modeling and scenario development
- Construction observation
- Well development
- Inland and ocean desalination subsurface intakes
- Slant wells
We are one of the first firms to study well screen design and its effect on good efficiency. In the early 1980s, we teamed with Roscoe Moss Company to develop one of the world’s largest aquifer models to empirically study well screen and filter pack configuration and efficiency. Our results were published and form the basis for well design standards still used by the industry today.
Sustainable Groundwater Management and Modeling
Slant wells are drilled at an angle, allowing the well to pump water from below the ocean surface (example opposite). The sea water obtained by this method has fewer impurities, reducing the need for pretreatment. The subsurface intake also eliminates impact to ocean ecosystems that would occur with open ocean intakes. Geoscience developed and is a leader in slant well subsurface intakes for seawater reverse osmosis desalination plants.
We designed and installed the first successful artificially filter packed slant well near Dana Point, California and are currently developing slant wells for the Monterey Peninsula Water Supply Project.
In 2003 we were approached by one of our clients to help them solve a unique problem; how to develop an ocean desalination facility in an environmentally sensitive coastal area without impacting marine life and recreational activity on the beach? We had to look at things from a different angle—literally. After studying several methods, we figured out how to use existing well technology, but construct it at an angle on the beach to draw saltwater from beneath the ocean floor.
Augment Groundwater Supply
Groundwater recharge and storage projects help communities save water for a not so rainy day. By letting excess water from storms, imported sources, and recycled water seep back into the aquifer, water providers can augment their supply during dry years. However, not all locations are suitable for groundwater storage and recovery. There may be impermeable barriers that prevent water from seeping into the ground, the local geology won’t hold much water, or the groundwater flows away from the point of recharge before it can be recaptured.
Our team at Geoscience can help agencies develop groundwater recharge and augmentation projects. We are often called upon to help identify areas that are best suited for groundwater recharge and recovery, determine the amount of water capable of being stored in the aquifer, tracing groundwater flow, and determining the amount of recovery possible. We also, help design and test recharge basins, injection wells, and recovery wells.
Geoscience provides support for the following:
- Artificial recharge
- Conjunctive use, storage, and recovery
- Groundwater modeling
- Develop lithological models
- Facility placement and design
- Tracer testing
According to the California Department of Water Resources, there are between 850 million to 1.3 billion acre-feet of storage available in California’s groundwater basins. An acre-foot is the amount of water it takes to cover one acre in a foot of water—that’s 325,851 gallons of water. That means that we can potentially store enough water underground to cover the entire State of California in eight to 12 feet of water!
Many groundwater basins within California cannot be used for water supply because it has a high salt content. While not as salty as the ocean, the water in these basins have a high enough salt content that they cannot be used for domestic or agricultural use without treatment.
Geoscience often helps water providers to quantify the amount of salt in the groundwater and locate areas with the highest concentrations. We also help determine the amount of saltwater that can be produced to help determine the type of treatment system needed. Our team also designs production wells for the desalting facility and observes field activities during construction.
The ocean provides a nearly limitless source of water and can be a critical source of supply in times of drought. While most desalination facilities use open ocean intake systems that draw water directly from the ocean, many water providers are beginning to use subsurface intake systems such as vertical beach wells and slant wells to provide water to their desalination facility. Subsurface intakes draw salty water from beneath the ocean floor—virtually eliminating impacts to marine life.
Geoscience can help determine the feasibility of subsurface intake systems, calculate potential production rates, and design subsurface intake systems. We also provide field observation during construction and can provide ongoing monitoring support.
Defend Groundwater Rights
Our experienced and knowledgeable staff are commonly called upon to support a variety of groundwater related legal issues and litigation. We have successfully helped defend our clients by providing expert testimony, provide dispositions, prepare exhibits, provide independent reviews, and other support. Below are some of the types of cases that we routinely support:
- Surface and groundwater rights
- Groundwater adjudications
- Well construction defects
- Insurance Cases
- Contamination/groundwater quality
- Groundwater protection