Final Report to the Coastal Erosion Abatement Commission, Commonwealth of Virginia concerning the inventory of sand supplies in the southern Chesapeake Bay

This final report to the Coastal Erosion Abatement Commission concerning the inventory of sand supplies in the southern portion of Chesapeake Bay is a continuation of the work reported on in September 1981 (Byrne et al). The report includes technical appendices in addition to the general text

Report to the Coastal Erosion Abatement Commission Commonwealth of Virginia concerning the Inventory of Sand Supplies in the Southern Chesapeake Bay

In its report to the Governor and the General Assembly of Virginia (Senate Document No. 4, Commonwealth of Virginia, 1979), the Coastal Erosion Abatement Commission found that there is a need to locate sources of sand supplies for rebuilding public beaches. Certain bottom areas in the lower Chesapeake Bay should be studied as possible sources of sand supply for public beaches. And toward that end, the Commission recommended that The School of Marine Science, Virginia Institute of Marine Science, College of William and Mary, study and analyze possible sources of sand supply in the lower Chesapeake Bay and vicinity for rebuilding public beaches. This report describes the investigations undertaken during the first year of the appropriation, July 1980 through June 1981

Shoreline Erosion in the Commonwealth of Virginia: Problems, Practices, and Possibilities

This report, Shoreline Erosion in the Commonwealth of Virginia: Problems, Practices, and Possibilities, is a report on the physical, legal, and economic aspects of shoreline erosion in Virginia. Although erosion is a physical process, it generally is not perceived as a problem until it has an economic impact on either an individual, community, or resource. As management of the impacts of erosion involves land use, economic, and legal issues as well as a technical assessment of the problem, an interdisciplinary approach was required. Authors Byrne and Hobbs are physical scientists with experience and interest in the workings of the shoreline. Theberge is a lawyer specializing in marine affairs. Kerns, Langeland, and Scheid are resource economists and environmental planners; and Barber and Olthof are land use planners. The division of responsibilities followed the obvious lines. The physical scientists described the problem and its causes and provided the technical analysis of the shoreline. The economists explored the costs of erosion and of combating erosion and , .. developed the economic decision framework. The planners considered the institutional arrangements and policies necessary for the rational treatment of erosion; and the legal experts researched the existing body of law pertaining to shoreline erosion. The four groups functioned as a team with continuous interaction and discussion among all participants

Purification and Characterization of meta-Cresol Purple for Spectrophotometric Seawater pH Measurements

Spectrophotometric procedures allow rapid and precise measurements of the pH of natural waters. However, impurities in the acid–base indicators used in these analyses can significantly affect measurement accuracy. This work describes HPLC procedures for purifying one such indicator, meta-cresol purple (mCP), and reports mCP physical–chemical characteristics (thermodynamic equilibrium constants and visible-light absorbances) over a range of temperature (T) and salinity (S). Using pure mCP, seawater pH on the total hydrogen ion concentration scale (pHT) can be expressed in terms of measured mCP absorbance ratios (R = λ2A/λ1A) as follows:where −log(K2Te2) = a + (b/T) + c ln T – dT; a = −246.64209 + 0.315971S + 2.8855 × 10–4S2; b = 7229.23864 – 7.098137S – 0.057034S2; c = 44.493382 – 0.052711S; d = 0.0781344; and mCP molar absorbance ratios (ei) are expressed as e1 = −0.007762 + 4.5174 × 10–5T and e3/e2 = −0.020813 + 2.60262 × 10–4T + 1.0436 × 10–4 (S – 35). The mCP absorbances, λ1A and λ2A, used to calculate R are measured at wavelengths (λ) of 434 and 578 nm. This characterization is appropriate for 278.15 ≤ T ≤ 308.15 and 20 ≤ S ≤ 40

Wave Climate Model of the Mid-Atlantic Shelf and Shoreline (Virginia Sea): Model Development, Shelf Geomorphology, and Preliminary Results

A computerized wave climate model is developed that applies linear wave theory and shelf depth information to predict wave behavior as they pass over the continental shelf as well as the resulting wave energy distributions along the coastline. Reviewed are also the geomorphology of the Mid-Atlantic Continental Shelf, wave computations resulting from 122 wave input conditions, and a preliminary analysis of these data