David Rolbiecki

• Master of Science
• Chief of Survey at Independent Researcher

Finding one’s geographic position by astronomic observation requires some knowledge of astrometry—the applied branch of astronomy that deals with the physical measurement of celestial bodies—whether it’s by optical methods (sextant, theodolite) or radio astronomy. Two fundamental astronomical coordinate systems are used in celestial navigation to s...

This paper is intended to familiarize the modern land surveyor with astrogeodetic methods and the process of obtaining a grid azimuth in the absence of Global Navigation Satellite System (GNSS) technology based on classic astronomic observations for the purpose of determining the Laplace correction and geodetic azimuth in order to obtain a state pl...

The global distribution of freshwater benthic macroinvertebrates inspired an American soldier, who was deployed to Afghanistan eight months after the September 11 attacks, to undertake a sampling expedition focused on these organisms in the subalpine region of Shakar Dara, Afghanistan. This initiative may represent the first instance of an American...

Data comprising the location, size, and frequency of occurrence of 1,300 bottomland riparian trees along a 4,300 ft (1,311 m) stretch of Denton Creek in Grapevine, Texas, was captured. Twenty-five separate species were determined from fourteen different families whose diameter at breast height (DBH) was three inches (7.62 cm) or greater. Elms were...

Field sampling of aquatic macroinvertebrate communities was conducted to study the effects of sudden flood disturbances following a lull in abnormally persistent spring rainstorms. Despite this disturbance and low collection success, overall diversity was high (Simpson’s index, Ds = 0.87), where pool zones exhibited the greatest diversity (Ds = 0.9...

A series of personal research in the aquatic sciences beginning from graduate school in 1996-1998, and to the present. Topics include limnology, the study of freshwater fishes and benthic macroinvertebrates, lake and river morphology, hydrology, riparian habitats, species diversity and community structure. This work takes place in north central Tex...

The functional role of animals in marine and freshwater systems is as diverse as the many species occupying these unique habitats. Physical, chemical and biological parameters affect the behavior and distribution of aquatic organisms and influence the overall productivity of aquatic ecosystems. In planktonic communities, diel vertical migration (DV...

The following corrections should be made to “Consequences of Ignoring the Curvature of the Earth in Nineteenth-Century Large Surveys: A Case Study of Geometrical Geodesy and the Survey of the Texas and Pacific Railway Company Eighty-Mile Reserve” by David A. Rolbiecki [https://doi.org/10.1061/JSUED2.SUENG-1499]: • In the second-to-last sentence of...

This paper is a case study and historical account of nineteenth-century surveying of the Texas and Pacific Railway Eighty-Mile Reserve, and the consequences from ignoring curvature of the earth allowances in large surveys extending beyond the horizon. The methods used in the survey of the Eighty-Mile Reserve in Texas are compared to the way surveyo...

The city of Frisco, Tex., published state plane coordinates were "ground scaled" into surface coordinates for the purpose of establishing a hybrid coordinate system to be easily used by surveyors. Nineteen city monuments were found and collected by GPS observation using real-time kinematic ͑RTK͒ connected to the Texas RTK Cooperative Network. The n...

This report summarizes the results of a 14 month long water quality survey of Lake Texoma : August 1996 - September 1997. The Tulsa District of the U.S. Army Corps of Engineers contracted with the Institute of Applied Sciences at the University of North Texas to conduct physical, chemical and biological sampling at strategic stations in Lake Texoma...

This report summarizes the results of a 14 month long water quality survey of Lake Texoma : August 1996 - September 1997. The Tulsa District of the U.S. Army Corps of Engineers contracted with the Institute of Applied Sciences at the University of North Texas to conduct physical, chemical and biological sampling at strategic stations in Lake Texoma...

Classifying surface water bodies according to trophic status by remote sensing techniques has had limited success in lakes with relatively high nonalgal turbidity levels. Since the trophic status of a lake is typically defined based on its chlorophyll-a concentration, and since relatively high suspended solids concentrations masks chlorophyll absor...

The underwater optical climate of Lake Texoma was measured at eleven fixed stations from August 1996 to August 1997. Secchi transparency and submarine photometry characterized seasonal and spatial values of secchi depth (SD), vertical attenuation coefficient (η''), and depth of euphotic zone (Zeu). Indices of Zeu:SD and η'' × SD were compared with...