Hydrologic Characteristics of Lagoons at San Juan, Puerto Rico, During a Januray 1974 Tidal Cycle (open access)

Hydrologic Characteristics of Lagoons at San Juan, Puerto Rico, During a Januray 1974 Tidal Cycle

From introduction: This report presents observed data on the interlagoon and ocean exchange of the flows of water, sediment, and selected chemicals for a tidal cycle in January 1974.
Date: January 1976
Creator: Ellis, S. R. & Gómez-Gómez, F.
System: The UNT Digital Library
Floods in New York, 1972, with Special Reference to Tropical Storm Agnes (open access)

Floods in New York, 1972, with Special Reference to Tropical Storm Agnes

From introduction: Flooding and flood damage in New York during the calendar year 1972 are summarized in this report. The report was prepared at the request of the New York State Department of Transportation under provisions of an agreement between the department and the U.S. Geological Survey for a cooperative, statewide program to investigate the water resources of the State.
Date: January 1976
Creator: Robison, F. Luman
System: The UNT Digital Library
Measurement and Prediction of Sediment Yields in Wisconsin Streams (open access)

Measurement and Prediction of Sediment Yields in Wisconsin Streams

From introduction: This report presents practical and useful sediment-yield information for Wisconsin. Measured and estimated sediment yields are supplemented by information on suspended-sediment concentration and particle size of suspended and bed material for 84 sites in the State. To expand the usefulness of these data, an additional section in the report presents a method to estimate or predict sediment yields in ungaged streams.
Date: January 1976
Creator: Hindall, S. M.
System: The UNT Digital Library
Preliminary Digital Model of Ground-Water Flow in the Madison Group, Powder River Basin and Adjacent Areas, Wyoming, Montana, South Dakota, North Dakota, and Nebraska (open access)

Preliminary Digital Model of Ground-Water Flow in the Madison Group, Powder River Basin and Adjacent Areas, Wyoming, Montana, South Dakota, North Dakota, and Nebraska

Abstract: A digital simulation model was used to analyze regional ground-water flow in the Madison Group aquifer in the Powder River Basin and adjacent areas. Most recharge to the aquifer originates in or near the outcrop areas of the Madison in the Bighorn Mountains and Black Hills , and most discharge occurs through springs and wells. Results from the model calculations indicate that the total flow through the aquifer in the modeled areas was approximately 200 cubic feet per second (5.7 cubic metres per second). The aquifer can probably sustain increased ground-water withdrawals probably would significantly lower the potentiometric surface in the Madison aquifer in a large part of the basin. The digital model could better predict the effects of withdrawals if more accurate estimates of the storage coefficient, transmissivity, and leakance could be obtained.
Date: January 1976
Creator: Konikow, Leonard F.
System: The UNT Digital Library