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P.J. Shade

Publications and source records attributed to P.J. Shade.

4 recordsLinked to original sources
USGS1986

Ground-water yield and potential for irrigated agriculture in the area of the Naval Magazine and Radio Transmitting Facility, Lualualei, Oahu, Hawaii

An estimated additional 2 million gallons per day (mgd) of fresh and slightly brackish water can be developed in Lualualei Valley , Hawaii, for the agricultural outleasing project. Several of these wells could be located in the volcanic aquifer which presently produces water of excellent quality. A secondary line of wells designed to develop water from the Coralline aquifer would capture the flow not captured by the wells in the volcanic aquifer. The chloride concentration of the water pumped from these wells is expected to range between 500 and 1,500 mg/L. The amount of acreage devoted to crops would depend primarily on the water quality and quantity requirements of the type of crops cultivated and on the type of irrigation system employed. The remaining acreage could be allocated for pasture to graze beef cattle. (Author 's abstract)

Water-Resources Investigations Report↗
USGS1983

Reconnaissance study of stream sedimentation, southern Guam

This study uses limited available data to estimate sediment yields for three basins in southern Guam. The flow-duration sediment-rating curve method, reservoir survey data, and Pacific southwest Inter-Agency Committee (PSIAC) formula were used. Daily suspended-sediment samples were collected at USGS gaging stations on the Ylig and Ugum Rivers for one year. Intermittent samples were collected from the Talofofo River for six months. Although limited, these data are used in the flow-duration sediment-rating-curve method to estimate mean suspended-sediment yields. Fena Reservoir sedimentation data are used to test the applicability of the PSIAC formula in the three basins. Estimates of suspended-sediment yields are 467 to 845, 678 to 977, and 634 to 855 tons per year per square mile for the Talofofo, Ylig, and Ugum basins, respectively. PSIAC estimates of total sediment yield are 1,200 tons/yr/mi2 for the Talofofo, 1,385 tons/yr/mi2 for the Ylig, and 1,210 tons/yr/mi2 for the Ugum basins. These values are comparable to estimates of sediment yields from several similar basins on Oahu, Hawaii. It appears that the PSIAC method can be a useful tool in estimating sediment yields in some tropical areas. (USGS)

Water-Resources Investigations Report↗