Engineering Commons^™

Dynamic Fluvial Systems And Gravel Progradation In The Himalayan Foreland, Nicholas Brozovic, Douglas W. Burbank

Daugherty Water for Food Global Institute: Faculty Publications

Although the large-scale stratigraphy of many terrestrial foreland basins is punctuated by major episodes of gravel progradation, the relationships of such facies to hinterland tectonism and climate change are often unclear. Structural reentrants provide windows into older and more proximal parts of the foreland than are usually exposed, and thus provide key insights to earlier phases of foreland evolution. Our magnetostratigraphic studies show that, although the major lithofacies preserved within the Himachal Pradesh structural reentrant in northwestern India resemble Neogene facies in Pakistan, they have a much greater temporal and spatial variability. From 11.5 to 7 Ma, major facies boundaries …

Crash Testing Of Michigan's Type B (W-Beam) Guardrail System - Phase Ii, Karla A. Polivka, Dean L. Sicking, John A. Rohde, Ronald K. Faller, James C. Holloway

Mid-America Transportation Center: Final Reports and Technical Briefs

Michigan Department of Transportation's Type B (W-beam) longitudinal barrier system was constructed and crash tested. The barrier design was constructed with a 2.66-mm (12-gauge) thick W-beam rail totaling 53.34 m in length. The W-beam rail was supported by twenty-five W152.13.4 steel posts, each measuring 1,830-mm long, and four standard BCT posts, each measuring 1,080-mm long. Each of the steel posts had a 152.203 by 360-mm long standard wood offset blockout. Post spacings were 1,905-mm on center.

The research study included full-scale vehicle crash testing, using a 3/4-ton pickup truck. The test vehicle impacted at a speed of 99.8 km/hr and …

U.S. Fish And Wildlife Service Biological Opinion On The Operation Of The Missouri River Main Stem Reservoir System, Operation And Maintenance Of The Missouri River Bank Stabilization And Navigation Project, And Operation Of The Kansas River Reservoir System

US Army Corps of Engineers

The Corps of Engineers provides the primary operational management of the Missouri River and is responsible under the Endangered Species Act to take actions within its authorities to conserve listed species. On April 3, 2000, the Corps asked the Fish and Wildlife Service to formally consult under the Endangered Species Act on the Operations of the Missouri River Main Stem System, and related Operations of the Kansas River Tributary Reservoirs, and the Operations and Maintenance of the Missouri River Bank Stabilization and Navigation Project. The Corps of Engineers prepared biological assessments for each of these projects and determined that their …

Baseline Assessment Of The Use Of A Small Missouri River Backwater By Fish At Ponca State Park In Dixon County, Nebraska, A. Luke Wallace

US Army Corps of Engineers

Ponca State Park is located adjacent to the Missouri River near the town of Ponca in Dixon County, Nebraska between river miles 753.8 and 755.3. This portion of the river is a 59-mile, unchannelized segment that has been designated as the Missouri National Recreational River under the Wild and Scenic Rivers Act. The majority of the park is situated high on bluffs that overlook the Missouri River. Until recently, the park had only a small amount of easily accessible river frontage. In 1999, the Nebraska Game and Parks Commission (NGPC) acquired an additional 295 acres of river bottomland on the …

Biological Assessment Protection Of Bald Eagle Nest Tree Cedar County, Nebraska

US Army Corps of Engineers

In February of 2000, the U.S. Army Corps of Engineers (Corps) was contacted about a potential bald eagle (Haliaeetus leucocephalus) nest in a tree that was in eminent danger of falling into the Missouri River as a result of stream bank erosion. This tree is located at approximate river mile 796.5, near St. Helena, in the NWl/4 of Sec. 28, T93N, R54W, Cedar County, Nebraska. Personnel from the Corps visited the site along with the landowner on March 9, 2000, and confirmed that the nest was a bald eagle nest. During the site visit, measurements of the eroding …

Habitat Erosion Protection Analysis Missouri National Recreational River Nebraska And South Dakota

US Army Corps of Engineers

The Corps was tasked by the National Park Service to detennine if erosion protection measures were needed to prevent further decline in cottonwood forest within the Missouri National Recreational River. The 1990's had three unusually high water years resulting in increased runoff and dam discharges, with resultant increased erosion. Concern about erosion of cottonwood forests was expressed by the public during public meetings held by the National Park Service and the Corps during 1999. Severe erosion was also evident in the comparison of aerial maps from 1985 to those from 1997. Forested habitat is considered a "wildlife value" for the …

Freshwater Mussels Of The Missouri National Recreational River Below Gavins Point Dam, South Dakota And Nebraska, Keith Perkins Iii, Douglas C. Backlund

US Army Corps of Engineers

In 1999 the U.S. Army Corps of Engineers contracted with the South Dakota Department of Game, Fish and Parks to conduct a presence/absence survey of the freshwater mussels of the Missouri National Recreational River below Gavins Point Dam, South Dakota and Nebraska. Subsequently, S.D. Department of Game, Fish and Parks contracted Keith Perkins III, a malacological expert at the University of Sioux Falls, to take charge of the inventory with the assistance of Doug Backlund, South Dakota Department of Game, Fish and Parks, Pierre, S.D.

Final Environmental Assessment Ponca State Park Resource And Education Center

US Army Corps of Engineers

An environmental assessment has been prepared that summarizes the expected effects of the proposed project on the existing environment. The Omaha District, Corps of Engineers in partnership with the Nebraska Game and Parks Commission, proposes to construct a research and education center (REC) at Ponca State Park in Dixon County, Nebraska. The proposed project would consist of the construction ofa 15,000 square foot REC building, a constructed treatment wetland to handle the waste from the REC building, a 1.5 acre lake that would receive used water from the heat pump system, a system of geothermal wells for use as part …

Nebraska And South Dakota 2000 Missouri River Recreational Use Survey, Gerald Mestl, Gerald Wickstrom, Clifton Stone

US Army Corps of Engineers

The 2000 Missouri River recreational use survey ran 1 April 2000 through 31 December 2000 and covered the Fort Randall Dam to Big Sioux River reach. Recreational user data was collected from postage paid post cards left on vehicles and through personal interviews. Pressure data was collected during a roving survey from ground counts of vehicles, boat trailers, recreational users. Aerial counts were made to compare angling and recreational boating data with ground count data.

Recreational users spent an estimated 745,303 hours on the Missouri River survey reach during 2000. Fishing accounted for an estimated 458,749 hours, or 62% of …

The Effect Of Ozone On Below-Ground Carbon Allocation In Wheat, J. K. Mccrady, C.P. Andersen

United States Environmental Protection Agency: Staff Publications

Short-term ¹⁴CO₂ pulse and chase experiments were conducted in order to investigate the effect of ozone on below-ground carbon allocation in spring wheat seedlings (Triticum aestivum L. `ANZA'). Wheat seedlings were grown in a sand-hydroponic system and exposed to either high ozone (38-40 ppm-h) or low ozone (23-31 ppm-h) for 21 days in a series of replicated experiments. Following the ozone exposures, the plants were pulsed with ¹⁴CO₂ and allocation of ¹⁴C-labeled photosynthate was measured in the plant and growth media. Soluble root exudates were measured, without disturbing the plant roots, 24 h after …

Determination Of Semivariogram Models To Krige Hourly And Daily Solar Irradiance In Western Nebraska*, G.G. Merino, D. Jones, David Stooksbury, Kenneth Hubbard

Department of Biological Systems Engineering: Papers and Publications

In this paper, linear and spherical semivariogram models were determined for use in kriging hourly and daily solar irradiation for every season of the year. The data used to generate the models were from 18 weather stations in western Nebraska. The models generated were tested using cross validation. The performance of the spherical and linear semivariogram models were compared with each other and also with the semivariogram models based on the best fit to the sample semivariogram of a particular day or hour. There were no significant differences in the performance of the three models. This result and the comparable …

Effect Of Sample Complexity On Quantification Of Analytes In Aqueous Samples By Near-Infrared Spectroscopy, Mark R. Riley, Mark A. Arnold, David W. Murhammer

Department of Biological Systems Engineering: Papers and Publications

This study was undertaken to quantitate the impact of increasing sample complexity on near-infrared spectroscopic (NIRS) measurements of small molecules in aqueous solutions with varying numbers of components. Samples with 2, 6, or 10 varying components were investigated. Within the 10-component samples, three analytes were quantified with errors below 6% and seven of the analytes were quantified with errors below 10%. An increase in the number of varying components can substantially increase the error associated with measurement. A comparison of measurement errors across sample sets, as gauged by the standard error of prediction (SEP), reveals that an increase in the …