Geology topics

Jeffrey E. Miller

Publications and source records attributed to Jeffrey E. Miller.

4 recordsLinked to original sources

USGS1984

Changes in flood response of the Red River of the North basin, North Dakota-Minnesota

The magnitude and frequency of large floods that have occurred in recent years in the basin of the Red River of the North have caused concern that land-use changes and manmade drainage have increased flooding. This study was undertaken to determine whether any changes in flood response of the basin could be documented. A review of the hydrologic setting, previous floods, flood-control measures, and probable effects of land-use changes shows that the flooding problem of the Red River basin is complex hydrologically, highly variable historically, and follows a regional pattern. Therefore, a change in flood response of the basin is difficult to identify. The flood-frequency, normalized-hydrograph, double-mass, and regression analyses show little indication of significant change in flood response of the Red River basin at locations on the main stem. However, the large variation in flood discharges may mask or dwarf small changes in response.

Minnesota, North Dakota↗

USGS1982

Changes in flood response of the Red River of the North Basin, North Dakota-Minnesota

The magnitude and frequency of large floods that have occurred in recent years in the basin of the Red River of the North have caused concern that land-use changes and manmade drainage have increased flooding. This study was undertaken to determine if any changes in flood response of the Red River basin can be documented. A review of the hydrologic setting, previous floods, flood-control measures, and probable effects of land-use changes shows that the flooding problem of the Red River basin is complex hydrologically, highly variable historically, and follows a regional pattern. Therefore, a change in flood response of the basin is difficult to identify. The flood-frequency, regression, normalized-hydrograph, and double-mass analyses show little indication of significant change in flood response of the Red River basin at locations on the main stem. However, the large variation in flood discharges may mask or dwarf small changes in response of the basin.

Open-File Report↗

USGS1980

Calibration of a distributed routing rainfall-runoff model at four urban sites near Miami, Florida

Urban stormwater data from four Miami, Fla. catchments were collected and compiled by the U.S. Geological Survey and were used for testing the applicability of deterministic modeling for characterizing stormwater flows from small land-use areas. A description of model calibration and verification is presented for: (1) A 40.8 acre single-family residential area, (2) a 58.3-acre highway area, (3) a 20.4-acre commercial area, and (4) a 14.7-acre multifamily residential area. Rainfall-runoff data for 80, 108, 114, and 52 storms at sites, 1, 2, 3, and 4, respectively, were collected, analyzed, and stored on direct-access files. Rainfall and runoff data for these storms (at 1-minute time intervals) were used in flow-modeling simulation analyses. A distributed routing Geological Survey rainfall-runoff model was used to determine rainfall excess and route overland and channel flows at each site. Optimization of soil-moisture- accounting and infiltration parameters was performed during the calibration phases. The results of this study showed that, with qualifications, an acceptable verification of the Geological Survey model can be achieved. (Kosco-USGS)

Water-Resources Investigations Report↗

USGS1979

One-dimensional steady-state stream water-quality model

A computer program, based on a one-dimensional mathematical model which predicts the stream water-quality response characteristics from waste source inputs, is described and documented. Variables predicted include dissolved oxygen, biochemical oxygen demand, nitrogen forms, total and fecal-coliform bacteria, orthophosphate-phosphorus, and various conservative substances. The model is based primarily on the well known Streeter-Phelps oxygen-sag equation. Special options of the program include the capability of handling nonpoint source waste inputs and anoxic conditions. The model formulation is based on a steady-state assumption which requires constant flow rate of waste and stream discharges and associated parameters. To achieve a problem solution, each reach of a stream system is broken into a given number of subreaches, generally defined by locations of waste or tributary inflow points. All waste constituents are assumed to be completely mixed within any cross section.

Water-Resources Investigations Report↗