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HYDROGEOLOGY OF THE POWDER MOUNTAIN AREA, WEBER AND CACHE COUNTIES, UTAH
The Utah Geological Survey performed a one-year study of the hydrogeology of the Powder Mountain area to better understand the hydrologic connection between springs, streamflow, and new water wells in adjoining parts of Cache and Weber Counties. The study included measuring stream discharge during baseflow conditions, measuring water chemistry, examining geology, and analyzing data from an aquifer test.
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The Elements of Geology
William Harmon Norton was Professor of geology at Cornell University. Norton wrote this textbook wanting to develop the relationship between causes and their effects in a clear cut manner. Norton stresses the importance of the teacher using field study and observation along with the text. The book is divided into three sections. External geology concentrates on weather, glaciers, wind etc. Internal geology studies the earthżs crust, earthquakes, volcanoes etc. The final section, historical geology, covers carboniferous, Mesozoic, tertiary, etc.
An Introduction to Geology
Geology is the scientific study of the Earth's surface, its evolution and the processes that have led to its change. The demonstration of the age of the Earth, chronicling of the Earth's geological history, evidence for plate tectonics, and the understanding of past climates have been possible because of advancements in the field of geology. Rock analysis is the most significant area of geological studies. Rock can be of three types, namely sedimentary, igneous and metamorphic. The techniques used in geological investigations are fieldwork, chemical analysis, numerical modeling, rock description and physical experimentation. Hydrocarbon and mineral exploration, hydrological studies, understanding of natural hazards and past climates, etc. are explored from within the framework of geology. This textbook is a valuable compilation of topics, ranging from the fundamental to the most complex theories and principles in the field of geology. It further elucidates the techniques and applications of geology in a multidisciplinary manner. The book strives to be a complete source of information for all students who are looking for an elaborate reference text on geology.
Cache Valley Aquifer Storage and Recovery
The City of Millville, located in a prime location for aquifer storage and recovery (ASR), is having issues with elevated nitrate in the Glenridge well, a public water supply sourced from the Cache Valley principal aquifer. To alleviate high nitrate, the city performed an initial injection and pumping test using the Glenridge well. Millville injected water from Garr Spring, another public water supply source of which they own water rights, into the Glenridge well for one week at a rate of 500 gallons per minute. They then pumped the well while monitoring geochemistry to determine the effects on the Cache Valley principal aquifer system. The pre-injection nitrate concentration in the Glenridge well was 7.65 mg/l nitrate as nitrogen, and the nitrate concentration after pumping more than 172% of the volume of water injected was 6.52 mg/l nitrate as nitrogen. There is likely some dispersion of the injected spring water via advection in the aquifer.
Investigation of land subsidence and earth fissures in Cedar Valley, Iron County, Utah
This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric...
FORWARD MODELING OF WELL PUMPAGE FROM THE POWDER MOUNTAIN CARBONATE AQUIFER, NORTHERN UTAH
The Utah Geological Survey conducted two-dimensional modeling to determine the cone of influence of a proposed water supply well near Powder Mountain Ski Resort. The model was used to determine how much groundwater was taken from either side of the Wasatch-Cache County line. The model accounted for leaky confining layers and influence from other wells and predicted the relative amount of groundwater taken from each county.
Regional groundwater flow and water quality in the Virgin River Basin and surrounding areas, Utah and Arizona
In this 46-page report, we characterized the deep aquifer system and its connections to the overlying aquifers in the area of the Hurricane fault in Washington County by examining well logs, creating regional potentiometric-surface maps, compiling groundwater quality data, conducting gravity surveys, examining remote sensing data for surface lineaments, and determining areas for potential monitoring wells. Results of the study were: (1) R and C aquifer groundwater depths are > 500 feet in the I-15 corridor area, (2) a groundwater divide likely exists south of the Utah-Arizona state line, (3) groundwater flow follows open fracture systems, (4) fracture conductivity is highest near the fault, (5) dissolution of evaporites increase groundwater TDS, and (6) a well should be drilled into the Hurricane fault near Pintura.
AQUIFER STORAGE AND RECOVERY IN MILLVILLE, CACHE COUNTY, UTAH
This study is an investigation of the feasibility of an aquifer storage and recovery project using the existing water supply infrastructure of the city of Millville, Utah. The project involved injecting water from a public water supply spring into a public water supply well. Geochemical analysis indicates that the major ion chemistry of the spring water is very similar to that of the principal aquifer, however, the spring water would likely cause minor geochemical changes in the groundwater due to oxidation. The study also showed that the injection well had elevated nitrate concentration which is likely due to septic systems in the area. Overall, the pilot tests showed that injection of water for storage would not be detrimental to the principal aquifer, which has significant storage abilities beyond the capacity of Millville’s water system; however elevated nitrate in the aquifer is a problem that should be addressed.
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