Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1004
Book Description
Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1004
Book Description
Government Reports Announcements & Index
Author: Effects of urban development on stream ecosystems in nine metropolitan study areas across the United States
Author: James F. ColesPublisher:
ISBN:
Category : Stream ecology
Languages : en
Pages : 138
Book Description
Urban Stormwater Management in the United States
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309125391
Category : Nature
Languages : en
Pages : 611
Book Description
The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Toxicological Profile for Polycyclic Aromatic Hydrocarbons
Author: Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500
Book Description
Redwood National and State Parks, Humboldt and Del Norte Counties, California
Author: United States. National Park ServicePublisher:
ISBN:
Category : National parks and reserves
Languages : en
Pages : 111
Book Description
Depomod
Author: Chris J. CromeyPublisher:
ISBN:
Category : Aquaculture
Languages : en
Pages : 132
Book Description
Low-Tech Process-Based Restoration of Riverscapes
Author: Joseph M. WheatonPublisher: Usu Restoration Consortium
ISBN: 9781543972993
Category : Science
Languages : en
Pages : 0
Book Description
The purpose of this design manual is to provide restoration practitioners with guidelines for implementing a subset of low-tech tools--namely beaver dam analogues (BDAs) and post-assisted log structures (PALS)--for initiating process-based restoration in structurally-starved riverscapes. While the concept of process-based restoration in riverscapes has been advocated for at least two decades, details and specific examples on how to implement it remain sparse. Here, we describe 'low-tech process-based restoration' as a practice of using simple, low unit-cost, structural additions (e.g. wood and beaver dams) to riverscapes to mimic functions and initiate specific processes. Hallmarks of this approach include: - An explicit focus on the processes that a low-tech restoration intervention is meant to promote.- A conscious effort to use cost-effective, low-tech treatments (e.g., hand-built, natural materials, non-engineered, short-term design life-spans) because of the need to efficiently scale-up application.- 'Letting the system do the work', which defers critical decision making to riverscapes and nature's ecosystem engineers.
The Ecological Condition of Estuaries in the Gulf of Mexico
Author: Publisher:
ISBN:
Category : Electronic government information
Languages : en
Pages : 84
Book Description
Atlantic Salmon in Maine
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309166586
Category : Technology & Engineering
Languages : en
Pages : 304
Book Description
Because of the pervasive and substantial decline of Atlantic salmon populations in Maine over the past 150 years, and because they are close to extinction, a comprehensive statewide action should be taken now to ensure their survival. The populations of Atlantic salmon have declined drastically, from an estimated half million adult salmon returning to U.S. rivers each year in the early 1800s to perhaps as few as 1,000 in 2001. The report recommends implementing a formalized decision-making approach to establish priorities, evaluate options and coordinate plans for conserving and restoring the salmon.