
Population growth brings increasing competition
and conflicts between a multitude of land uses. This poses increasing
challenges of growing complexity in water
resources development. Under these conditions careful
management of water resources requires professional expertise
from hydrologists and geologists.
Common
Land Use Problems
In recent years the Sierra Nevada region has experienced
one of the highest
population booms
in the State of California. Growing recreation and retirement communities
populated by people escaping the urban congestion are facing land
use is constraints by geologic hazards, such as landslides, flooding,
and erosion. Other constraints are posed by limited water supply
and water pollution.
Erosion Control and Flooding Solutions
To the prospective land owner our advice is to look carefully before
buying.
We have responded to a variety of problems facing
small land owners, including High Ground Water Tables and Failing
Septic Leach fields; poor Domestic Well Water Quality; Erosion, Flooding,
Land Slides, and many more.
Unexpected problems are inherited from difficult to control hydrologic
and geologic settings, aggravated by historic human activities and
current land use. These problems can severely diminish the monetary
and visual value of private land. Examples are:
- Troubles finding suitable domestic well locations
in high density suburban settings encroached by septic leach fields.
- Iron, manganese, hydrogen sulfite, natural organics,
bacteria and other water quality problems in wells.
- Diminished
well yields caused by screen encrustation; “sand
pumping” caused by casing and screen collapse.
- High ground
water tables encroaching into basements.
- Stream bank erosion, sediment
pollution and flooding problems, often leading to ugly gullies
and costly losses in real estate. Such problems are often inherited
from California’s historic
land use patterns.
- Failing septic leach fields due to poor soil
conditions and high ground water tables.
- Land and mud slides caused
by high moisture conditions, erosion, grading and poor road construction
practices.
Many of these problems have until recently haunted
only large land resource agencies like the US Forest Service and
BLM. But urbanization is increasingly affecting also private landowners,
real estate developers and ranchers. Given our long term residence
in Plumas County and in part by relying on what has been learned
by the Feather River
CRM, we have been able to give
much valuable advice to land owners, realtors and construction contractors.
Other land use problems facing business property owners include
hidden liabilities from hazardous chemical spills and leaking underground
fuel tanks. Such issues need to be identified by means of environmental
audits before a land purchase is closed.
Solving these problems usually requires on-site
visits with a great deal of attention to detail, usually applying
an interdisciplinary approach. We rely on our own hydrologic experience
and historical records, while networking with local engineers, biologists,
contractors and well drillers.
Percolation Tests; Soil Mantle Tests
and Piezometer Tests
Land development in rural counties typically relies on underground
leach fields to dispose of septic effluent. After all, it is a cheap
and efficient way of residential wastewater disposal. Local
building regulations require percolation and soil profile tests (mantle tests). Areas
with high ground water tables require piezometer tests. Following
County Health Department guidelines we provide advice on leachfield
locations, if poor soil constraints require site specific solutions.
Ground Water Exploration
The growing rural communities increasingly rely on ground water.
This trend runs into problems with water contamination from naturally
occurring iron, manganese and organics. Other constraints are posed
by leaking underground tanks and leach fields in the lake bed aquifers
of Sierra, Mohawk and American Valleys. More and more land developers
and municipalities are forced to develop ground water in the upland
fractured rock aquifers (granite, volcanics and shale). This poses
tough problems that have haunted many a driller and real estate developer
used to the relatively easy ground water development conditions in
the Central Valley of California.
In the past 20 years we have developed valuable
local experience in dealing with these challenges. We have located
numerous successful well drilling sites and helped develop ground
water resources for many community service districts, housing developments
and golf course projects in the local area’s fractured bedrock
and valley fill aquifers.
Aquifer Protection
Water quality degradation is becoming one of the most pervasive
side effects of land use. Driven by the booming population spreading
into the rural communities of the American West, in the last two
decades the need for ground water protection is becoming a growing
concern.
Unfortunately, for the general public ground
water flow still remains an obscure subject matter, making it difficult
to convince that ground water pollution needs to be prevented.
Public pollution awareness is typically characterized by the "out
of sight, out of mind" attitude.
Ground water is typically viewed as "pure", with many a
proud land owner showing off their almost impeccably clean wells
or springs. But once someone’s well is contaminated (or otherwise
affected by competing interests) a change in attitude is usually
inevitable. Contaminants and excessive water level declines in a
well are apt to hit a raw nerve in the American public. At this stage
most well owners tend to become very protective.
Ground water contamination is a nasty, expensive problem with severe
economic liabilities for municipalities and domestic well owners.
With rural communities heavily dependent on ground water, contamination
from septic leach fields, leaking underground storage tanks, household
wastes, water treatment plants, geothermal effluent, mine drainage,
land fills and other sources is becoming a growing problem. After
all, anything percolating into the ground will eventually end up
in the underlying aquifer (if not in a stream) - water that someone
else relies upon as a drinking water source.
As a result many of our clients are not only
burdened by cumbersome state regulations, but also face serious
dilemmas in ground water management. Many community services districts’ water
resources have been affected adversely by competing interests,
often requiring drastic measures to prevent soil and aquifer contamination.
In the most unfortunate cases contamination and well interference
has resulted in having to shut down municipal wells, if not requiring
aquifer cleanup.
We have worked on numerous ground water management
projects. One such project we have worked on locally is the American
Valley Aquifer Protection Program around Quincy. Another project
assessed urbanization
impacts on ground water quality in southwest
Reno. A major three year project by the Desert Research Institute
included our participation in assessing the impact of irrigation
return flow on the aquifers of the Fernley
Basin, 30 miles east of Reno.
Environmental Audits
Commercial property transfers can be fraught
with potential liability for both seller and buyer. In other words
- "buyer be aware".
We offer our experience in conducting environmental audits following
commonly accepted ASTM guidelines. - We also conduct underground
storage tank investigations, and assist landowners in recovering
costs from the State Underground Storage Tank Fund. To support our
projects we continue to maintain professional relations with a number
of larger consulting companies in Reno and Stockton.
Geothermal Exploration
With steeply increasing petroleum prices the interest
is growing again in direct use of low and intermediate temperature
geothermal resources. But significant
challenges remain, including disposal of poor quality water, remote
locations and high initial capital investment outlays.
Our experience in intermediate temperature
geothermal exploration reaches back to the early 1980’s, including geothermal projects
in Nevada, Montana, Idaho and California, with an increasing number
of projects in Modoc, Lassen and Plumas Counties. One advantage of
northeast California’s geothermal resources is the reasonably
good quality of its geothermal waters. |