Application of the U.S.G.S. DHM for Floodplain Analysis
The two-dimensional Diffusion Hydrodynamic Model, DHM, is applied to the evaluation of floodplain depths resulting from an overflow of a leveed river. The environmental concerns of flood...
Operational Remote Sensing of Snow Cover in the U.S. and Canada
The Office of Hydrology of the National Weather Service maintains a cooperative National Operational Hydrologic Remote Sensing Center, based in Minneapolis, to generate remotely sensed...
Towards a Rainfall Estimation Using Meteosat Over Africa
The scope of the research is to develop a method of rainfall estimation at both small space and time scales (9 pixels -225 km2-, and single shower...
The Development of a Hydrologic Drought Index and Termination Rate Probabilities
The development of a hydrologic drought index (HDI) based on drought severity is presented along with a new formulation for drought termination probabilities. Results indicate that termination...
Piedmont-Fan Flood Hazard Analysis From Geomorphology and Surface Water Hydrology, Hudspeth County, Texas
A 2-mi2 (5.2 km2) site selected by the Texas Low-Level Radioactive Waste Disposal Authority was technically...
Large Floods and Climate Change in the Southwestern United States
Floods can have a tremendous impact on water resources but their properties may fluctuate at frequencies that defy recognition in short-term instrumented records. Paleoflood deposits provide...
Misapplication of the FEMA Alluvial Fan Model: A Case History
The Federal Emergency Management Agency (FEMA) recently issued revised Flood Insurance Rate Maps (FIRM) for the Tortolita piedmont, located northwest of Tucson, Arizona. Floodplain delineations...
Drought Risk Analysis Based on Hydrologic Records of the River Nile
The characteristics of the parameters of hydrologic droughts are studied by analysing and modeling the maximum and 'minimum' stage-level series of the River Nile...
Regional Flood Frequency Equations for Antelope Valley in Kern County, California
Rapid residential, commercial, and industrial development has occurred in recent years in the Antelope Valley, California. With the new development progressing at full speed, the local...
Graphical Verification of Flood Frequency Analysis
In the analysis of flood frequency data, a proper distribution must be chosen to fit the data being analyzed. A properly applied distribution can minimize errors in the extrapolation of...
Western Surface Climate and Streamflow and the El Nino/Southern Oscillation
Climate variability has direct social and economic impacts the most direct of which occur through the hydrologic cylce. Of primary concern to society are the hydrologic extremes of floods...
Spectral Analysis of Annual Time Series of Mountain Precipitation
In this paper we examine the statistical moments of long record, annual, precipitation time series for 19 west facing stations along the Wasatch Front, northern Utah. The mean, variance,...
Precipitation Simulation Model for Mountainous Areas
This study investigated the use of the Markov chain-mixed exponential (MCME) model as a means of obtaining synthetic daily precipitation amounts at a site, based on knowledge of the mean...
Temporal Characteristics of Aridland Rainfall Events
Rainfall intensity data are required to drive infiltration-based runoff models. Because data are sparse and cumbersome, a model to generate reasonable sequences of data is needed. Studying...
Hydrologic Analysis Model for Screening Wetland Restoration Sites in the Rainwater Basin, Nebraska
Historically, the Rainwater Basin in south central Nebraska contained approximately 4,000 wetlands. Today, over 90 percent of those wetlands have been lost, primarily due to drainage for...
Arid Zone Hydrologic Implications for the Proposed Yucca Mountain Repository
The U.S. Department of Energy (DOE) has chosen Yucca Mountain, Nevada for characterization to determine if it is suitable to become the Nation's first High-Level Radioactive...
Sediment Transport Models for Small Gullies in Loess Hill and Gully Regions
Three items are studied: the equation of the relation between discharge and sediment for small gullies derived by using the theory of river dynamics; the extension of the Nash theory of...
The Sorry State of Flood Hydrology in the Arid Southwest
Flood hydrology for urban areas of the arid and semiarid Southwest is in a sorry state. It is based in large part on precomputer manual methods. The state-of-the-art should move into the...
Complex Geomorphic Response to Minor Climate Changes, San Diego County, CA
Precipitation in San Diego County, California over the past several hundred years has been characterized by excursions between periods of relatively low precipitation having durations...
Synthetic Calibration of a Rainfall-Runoff Model
A method for synthetically calibrating storm-mode parameters for the U.S. Geological Survey's Precipitation-Runoff Modeling System is described. Synthetic calibration is accomplished...
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