100-N AREA AQUIFER EVALUATION

Technical Report · Tue Nov 01 04:00:00 EST 1960

OSTI ID:4060381

Brown, D J; Rowe, P P

The hydraulic characteristics of the unconfined aquifer adjacent to the Columbia River change considerably during certain seasons of the year. These changes are the direct result of fluctuations in the river level. During the low stages of the river the ground water percolates through partially cemented sands and gravels of the Ringold formation. As the river approaches the flood stage the water table rises into the more permeable fluviatile and glaciofluviatile rocks. Using a method developed by Rowe the transmissibility and coefficient of storage of the unconfined aquifer underlying the 100-N area were determined. The measurements for these determinations were made when the river was nearing its flood stage in order to obtain the most representative values for these coefficients. Based on these data the calculated average permeability values range from 1500 to 3000 gpd/sq ft. These permeability values are consistent with those determined elsewhere on the project in similar earth materials. The calculated hydraulic characteristics of the 100-N aquifer were used to evaluate the performance of a waste water disposal facility. A tentative evaluation indicates that the infiltration capacity of the soil may control the size needed. It is estimated that the proposed 30-ft trench parallel to the river would not create a problem as a result of its effect on the water table. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• NSA Number: NSA-15-013156
• OSTI ID: 4060381
• Report Number(s): HW-67326; AT(45-1)-1350
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

GEOLOGY, MINERALOGY, AND METEOROLOGY
GROUND WATER
HYDRAULICS
HYDROLOGY
LEVELS
OSCILLATIONS
POROSITY
ROCKS
SEPARATION PROCESSES
STORAGE
TRANSPORT
WASTE DISPOSAL