Download or read book Assessing the Sources and Loadings of Pollutants Affecting Tijuana Estuary written by René Langis and published by . This book was released on 1991 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tijuana Estuary Tidal Restoration Program written by and published by . This book was released on 1991 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Management Plan for Tijuana River National Estuarine Research Reserve and Tijuana Slough National Wildlife Refuge written by and published by . This book was released on 1999 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Synthesis of Research in the National Estuarine Research Reserve System written by and published by . This book was released on 1993 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing Ecosystem Health Through Contaminants in the Tijuana River National Estuarine Research Reserve written by Nancy Torres and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Tijuana River Estuary (TRE) remains the largest, most-intact coastal wetland in Southern California, it has a history of major changes, much of this related to its location immediately north of the US / Mexico Border. One of the primary challenges is cross-border flows from the rapidly growing city of Tijuana, Baja California, Mexico, and the delivery of wastewater, debris, and sediment to sensitive coastal wetland ecosystems. There is a need to more fully investigate these environmental changes to assess the ecosystem health of the Tijuana River Estuary over time, especially related to pollution impacts. This can inform an understanding of changes in both species and stressors, and can also help assess the effectiveness of past management strategies. Since 1986, the NOAA Mussel Watch and California Surface Water Ambient Monitoring Programs have periodically collected data on chemical contaminants and biological indicators of water quality in the TRE. This project builds on these past monitoring efforts and established methodologies to assess status and trends of contaminants in sediment and organisms. This work was accomplished by conducting a thorough review of available datasets and literature to document past changes in the estuary and refine sampling approaches. Sampling was conducted at three locations in the Tijuana River Estuary to assess spatial variability. Compared to national thresholds, most contaminant concentrations were at relatively low levels in 2021, with some having decreased from previously higher levels in the 90s. When comparing species groups, fishes had the highest organic concentrations, indicating the ongoing processes of bioaccumulation and biomagnification. Levels of some organics in fish, such as total DDT and PBDEs, remain at levels which could be of some concern for sensitive piscivorous birds. Also, the highest concentrations were near a local urban outfall point rather than from the Tijuana River itself. Overall, this information improves our ability to document and interpret long-term trajectories of contaminant change in the ambient environment and key taxa. This project's results include communication and management tools depicting the estuary's ecosystem health over time.
Download or read book Institutional Reform and Transboundary Cooperation for Environmental Planning Along the United States Mexican Border written by Francisco Lara-Valencia and published by . This book was released on 2002 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tijuana Estuary Tidal Restoration Program written by and published by . This book was released on 1993 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ECOLOGY OF TIJUANA ESTUARY CALIFORNIA written by JOY B. ZEDLER and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Borderlands Studies written by and published by . This book was released on 1999 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of Tijuana Estuary California written by Joy B. Zedler and published by Forgotten Books. This book was released on 2017-10-28 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Ecology of Tijuana Estuary, California: A National Estuarine Research Reserve The Nation's estuaries are heterogeneous in size, physiography, watershed interactions, chemistry, and biota. In this Profile, we point out how the various properties of Tijuana Estuary compare to those of other estuaries within the region as well as within the nation. The designation of Tijuana Estuary as one of the National Oceanic and Atmospheric Administration's National Estuarine Research Reserves shows that it is one of a class of ecosystems worthy of research and education, yet different enough to warrant selection as a regional type. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of Tijuana Estuary California written by Barbara Elaine Kus and published by Andesite Press. This book was released on 2015-08-13 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book San Ysirdro Land Port of Entry Improvements Project written by and published by . This book was released on 2009 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Indexes written by United States. Environmental Protection Agency and published by . This book was released on 1983 with total page 1760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book State Route 11 Corridor Location and Route Adoption and Location Identification of the Otay Mesa East Port of Entry on Otay Mesa in the County of San Diego written by and published by . This book was released on 2008 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Local Watersheds on Sediment Accumulation in the Tijuana Estuary Reserve written by Shannon Rae Webber and published by . This book was released on 2010 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tijuana Estuary in San Diego is one of the largest and most valued wetland ecosystems remaining in southern California. Sediment is a key management problem at the Tijuana Estuary. The estuary receives sediment from four major sources: the Tijuana River and three side canyons (Yogurt Canyon, Goat Canyon, and Smuggler's Gultch); with sediment from Goat Canyon Watershed being the main concern. This study examines Goat Canyon's role of sediment accumulation in the Tijuana Estuary versus the larger Tijuana River Watershed's role on sediment accumulation in the estuary. Through field measurements, we concluded that urbanization in Goat Canyon has likely increased sediment entering the estuary and can lead to an average of 70,000 tons of sediment entering the estuary annually. In comparison, dam construction in the Tijuana River Watershed has likely decreased sediment entering the estuary. Based on the size of the watershed area, fifteen times more sediment enters the Tijuana Estuary from Goat Canyon than Tijuana River Watershed. Particle size characterization and 210Pb isotopic dating were run on three cores extracted from these two major depositional zones in the Tijuana Estuary. Two cores from the Tijuana River depositional environment exhibited an estimated average annual sediment rate of ~ 0.55 cm/yr. 210Pb activity in the core from Goat Canyon's depositional environment showed a much different sedimentation pattern exhibiting a substantial change in texture and source. The core shows signs of older originally deposited sediment - possibly from deeper gullies and rilling in Goat Canyon - being eroded and deposited on top of originally younger sediment - possibly from surface sheetwash in Goat Canyon. Sampling of 210Pb in Goat Canyon's surface and subsurface would help determine the source of sediment entering the estuary. Deeper cores from Goat Canyon's depositional environment are needed in order to get an average sediment rate. Knowing the source of sediment production in Goat Canyon, along with continuing core extractions, will aid in future mitigation strategies to deal with the effects of increased deposition on the estuarine ecosystem.
