UNT Libraries Government Documents Department - 260 Matching Results

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Ground Water in the Lajas Valley, Puerto Rico

Description: Abstract: Lajas Valley is plagued with problems of salinity and waterlogging the soils. Use of brackish (500 milligrams per liter) irrigation compounded ground water for the problem until an irrigation-drainage system was constructed in 1955. Lajas is an alluvium-filled limestone highlands. The alluvium, mostly clay and as much 300 feet (90 meters) thick, contains brackish ground water except in the recharge areas located along the foothills...Results from a digital model show that a network of discharge wells could alleviate waterlogging of the soils in the artesian area.
Date: March 1977
Creator: Anderson, Henry R.

History of Dredging and Filling of Lagoons in the San Juan Area, Puerto Rico

Description: Abstract: Laguna La Torrecilla, Laguna de Pinones, Laguna San Jose, and Laguna del Condado, in the San Juan, Puerto Rico area, are located within a metropolitan area of more than 1 million people. Bathymetric maps made during the study, in 1973, showed that Lagunas La Torrecilla, San Jose, and del Condado have been modified by dredging and filling; whereas, Laguna de Pinones has remained in a near natural state. Laguna La Torrecilla has been dredged to a depth, in places, of about 18 metres, and Lagunas San Jose and del Condado, in places to about 11 meters. Dredging in the San Juan lagoons has been harmful, beneficial, and in a few instances has had little or no noticeable effect on the water quality. Usually, dredging in the connecting canals has been beneficial if the water entering the lagoons through the canals was of better quality than the water in the lagoon. Dredging in the mouths of lagoons has been beneficial; whereas, filling or blocking the mouths has been harmful.
Date: September 1976
Creator: Ellis, S. R.

Statistical Summary of Daily Values Data and Trend Analysis of Dissolved-Solids Data at National Stream Quality Accounting Network (NASQAN) Stations

Description: From abstract: A statistical summary of the available continuous and once-daily discharge, specific-conductance, dissolved oxygen, temperature, and pH data collected at NASQAN stations during the 1973-81 water years and documentation of the period of record on which the statistical calculations were based are presented.
Date: 1983
Creator: Wells, Frank C. & Schertz, Terry L.

Limnology of Lago Loiza, Puerto Rico

Description: From purpose and study: The principal objectives of this study were as follows: (1) to determine the existing water-quality conditions in Lago Loiza as reflected by the principal chemical, physical, biological and bacteriological characteristics in the lake and its tributaries. (2) To estimate the reservoir's water budget during the study period, including the contributions from the tributaries and other sources. (3) Estimation of the reservoir's overall nitrogen and phosphorus budget, including the principal sources and sinks of these nutrients. (4) Definition of the sedimentation rate in the reservoir.
Date: February 1980
Creator: Quiñones-Márquez, Ferdinand

Water Resources of the North Coast Limestone Area, Puerto Rico

Description: From introduction: The North Coast Limestone area is one of the two most important ground-water provinces of Puerto Rico--the other being the South Coast Alluvial aquifer. The investigation of the water resources of the South Coast has progressed to the point that at this time (mid-1971) an electric-analog model of the area is being prepared. The hydrology of the North Coast Limestones, however, was never investigated as a whole before this investigation, and, therefore, this study was designed to assess the most important hydrolic features of the area.
Date: February 1976
Creator: Giusti, E. V. & Bennett, G. D.

Ground Water in the San Juan Metropolitan Area, Puerto Rico

Description: From introduction: A post-drought analysis of the sources of water supply for the metropolitan area indicated a need for better knowledge of the ground-water resources. A study was implemented through the cooperative water-resources investigation program between Commonwealth agencies of Puerto Rico and the U.S. Geological Survey.
Date: July 1976
Creator: Anderson, Henry R.

Limnology of Laguna Tortuguero, Puerto Rico

Description: Abstract: The principal chemical, physical and biological characteristics, as well as the hydrology of Laguna Tortuguero, Puerto Rico, were studied from 1974-75. The lagoon, with and area of 2.24 square kilometers and a volume of about 2.68 million cubic meters, contains about 5 percent of seawater. Drainage through a canal on the north side averages 0.64 cubic meters per second per day, flushing the lagoon about 7.5 times per year. Chloride and sodium are the principal ions in the water, ranging from 300 to 700 mg/L and 150 to 400 mg/L, respectively. Among the nutrients, nitrogen averages about 1.7 milligrams per liter, exceeding phosphorus in a weight ratio of 170:1. About 10 percent of the nitrogen and 40 percent of the phosphorus entering the lagoon is retained. The bottom sediments, with a volume of about 4.5 million cubic meters, average 0.8 and 0.014 percent nitrogen and phosphorus, respectively.
Date: March 1978
Creator: Quiñones-Márquez, Ferdinand & Fusté, Luis A.
Location Info:

Water Resources of the Lower Rio Grande De Manati Valley, Puerto Rico

Description: From introduction: This report summarizes the results of the study in the Manati-Barceloneta area. The study includes an analysis of the availability of water from both surface and ground-water sources, and water quality. The major focus of the study was the alluvial valley of Rio Grande de Manati north of Highway 2. Areas outside of the valley were included as necessary only to the degree in which these influence the local hydrology.
Date: 1984
Creator: Gómez-Gómez, Fernando

Puerto Rico's Current Fiscal Challenges

Description: This report discusses multiple challenges the government of Puerto Rico faces in the fall of 2015. Concerns regarding the sustainability of Puerto Rico's public finances have intensified over the past year, despite several measures taken by the island's government to reduce spending, increase revenues, and restructure its obligations. The Puerto Rican government outlined a medium-term strategy to address those challenges in a fiscal plan put forth in mid-September 2015.
Date: June 3, 2016
Creator: Austin, D. A.

Puerto Rico Energy Center Study: Executive Study

Description: From background: The study is an outgrowth of investigations by the Atomic Energy Commission and the Office of Saline Water into the use of nuclear energy to supply heat for desalting seawater and for generating electricity, and of work on the energy center concept conducted at the AEC's Oak Ridge National Laboratory. The bases for the study were set forth in a Memorandum of Understanding signed by Commissioner James T. Ramey of the United States Atomic Energy Commission, Under Secretary David S. Black of the United States Department of the Interior, Acting Executive Director Fernando Torrent of the Puerto Rico Water Resources Authority, and Executive Director Orlando Gonzalez of the Puerto Rico Aqueduct and Sewer Authority.
Date: July 1970
Creator: Burns and Roe, Inc.

Political Status of Puerto Rico: Brief Background and Recent Developments for Congress

Description: This report provides policy and historical background about Puerto Rico's political status--a term of art referring to the relationship between the federal government and a territorial one. It emphasizes recent developments that are likely to be most relevant for Congress. Congress has not altered the island's status since 1952, when it approved a territorial constitution.
Date: June 12, 2017
Creator: Garrett, R. S.

Puerto Rico Electric Power Authority and Debt Restructuring under PROMESA, P.L. 114-187

Description: This report discusses the Puerto Rico Electric Power Authority (PREPA) and its debt restructuring process under the Puerto Rico Oversight, Management, and Economic Stability Act (PROMESA). The major debt the company is in has prevented it from maintaining power stations and transmission lines properly or diversifying its energy production methods leading to widespread unreliability of the power supply and high prices.
Date: August 8, 2017
Creator: Austin, D. Andrew & Campbell, Richard J.

Puerto Rico and Electric Power Restoration from Hurricane Maria

Description: This report discusses efforts to restore power in Puerto Rico after Hurricane Maria decimated the island's electricity infrastructure. Challenges in power restoration due to the extent of the damage, supply deliveries, timing of the storm after Hurricane Harvey and Irma, and the electric company's financial crisis along with recommendations for strengthening the electric system are discussed.
Date: September 21, 2017
Creator: Campbell, Richard J.

Repair or Rebuild: Options for Electric Power in Puerto Rico

Description: This report explores several alternative electric power structures to PREPA for meeting the electricity services and needs of Puerto Rico. The ability of Puerto Rico and its citizens to assume the burden of paying for a rebuilt (and possibly restructured) electricity system is doubtful. Modernizing Puerto Rico’s grid, and taking the next steps to incorporate resiliency, could be expensive. None of the options discussed provides a silver bullet solution to the issues of the grid in Puerto Rico. Congress may consider whether the efforts to restore electric power in Puerto Rico need to progress beyond simple restoration of electricity, and require new investment and oversight by the federal government.
Date: November 16, 2017
Creator: Campbell, Richard J.; Clark, Corrie E. & Austin, D. Andrew

Comprehensive Energy Planning for Puerto Rico and U.S. Virgin Islands

Description: This report discusses the electric power grid of Puerto Rico and the U.S. Virgin Islands which were mainly destroyed by Hurricanes Irma and Maria with Puerto Rico being the hardest hit power grid. The report mainly concerns previous and current efforts to create long-term comprehensive energy plans for insular areas such as Puerto Rico and some of the challenges encountered in doing so.
Date: November 6, 2017
Creator: Clark, Corrie E.