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Simulating Spatially Varied Thunderstorm Rainfall
Using data from two independent, relatively dense networks of raingages located in the vicinity of Tucson, Arizona, the spatial distribution of thunderstorm rainfall was determined as...

Rainfall-Sampling Impacts on Runoff
The sensitivity of computed peak-runoff rates to rainfall-sampling frequency over three semiarid watersheds in southeastern Arizona of increasing size is investigated using the methodology...

Precipitation on Arid or Semi-Arid Regions of the Southwestern United States: Research Needs from a Consultant's Perspective
In terms of both instantaneous flow peaks and total runoff volumes, a key element in the quantification of stormwater runoff from arid and semi-arid regions of the southwestern United...

Multiple Phenomena of Debris-Flow Processes: A Challenge for Hazard Assessments
Hazardous hydraulic processes associated with arid environments commonly repesent significant risks to the safety of the public. However, the public generally considers these risks to...

Recurrence of Debris Flows on an Alluvial Fan in Central Utah
In the spring of 1983 a large debris flow occurred in the drainage of Birch Creek, near Fountain Green in central Utah. During the debris-flow activity, a new channel was incised into...

Design Cloudburst and Flash Flood Methodology for the Western Mojave Desert, California
A methodology was required for estimating flow in ungaged drainages. An analysis of floods in the western Mojave Desert showed that the largest events on basins below 1,500 meters MSL...

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...

Structural Control of Ground-Water Induced Debris Flows
A number of case studies have attributed debris flow initiation to the effect of elevated pore pressure from a bedrock ground-water source. Debris flows on slopes underlain by Precambrian...

Geomorphology and Sedimentology of a Valley Fan, Southern Utah
Sink Valley, located in semi-arid west-central Kane County, Utah, lies on an erosional surface of Cretaceous age Tropic Shale. The valley contains an example of a previously undocumented...

Runoff and Erosional Processes in an Arid Watershed
This paper reports the results of geomorphic, hydrologic, and hydraulic analyses that integrated a physical process computer model of rainfall/runoff processes with a geomorphic process/response...

Application of Geological Information to Arizona Flood Hazard Assessment
Hydrological modeling procedures applied to regulatory flood-hazard zonation can be misapplied when assumptions concerning flood-hazardous processes are violated. Geomorphological mapping...

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...

Estimating Sediment Delivery and Yield on Alluvial Fans
This paper summarizes the procedures used for computing the basinwide annual yields and single event sediment production for ephemeral channels located on an incised alluvial fan in Central...

Sediment Sources, Transport and Delivery to an Alluvial Fan, Caliente Creek, California
Sediment delivery to a proposed flood detention reservoir site in the medial region of the Caliente Creek alluvial fan is dependant on the magnitude and duration of flood flows. Because...

Soil-Moisture Flux Studies on the Nevada Test Site A Review of Results and Techniques
Over the last 20 years, numerous studies of soil-moisture flux and/or ground-water recharge have been conducted on the U.S. Department of Energy's (DOE) Nevada Test Site (NTS)...

Nitrate and Bromide Transport Through a Vadose Zone in New Jersey
Ongoing field experiments on monitoring transport of Sodium Nitrate and Potassium Bromide in the vadose zone over a shallow groundwater table in the coastal plains of New Jersey are discussed....

Stochastic Modeling of Monthly Flows in Streams of Arid Regions
A new stochastic model is presented herein which is applicable to simulating monthly flows of streams in arid regions. The model enables one to reproduce the percentage of zero flows in...

 

 

 

 

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