An Improved Design of Fishways Under High Variation of Headwater
For the purpose of mitigating environmental impact, it is necessary to build fish passing facilities for fish migration when a dam is constructed on a river. But when the headwater variation...
Fishy Business
Hydroelectric power accounts for about 12% of U.S. electric supply and virtually all the nation's renewable energy capacity. Yet hydro is under increasing attack on environmental...
Resource Implications of Listing Columbia River Basin Salmon Stocks Under the Endangered Species Act
The Columbia River and Snake River dams and reservoirs provide substantial benefits in the Northwest through their operation for hydropower, flood control, irrigation, navigation, and...
Nonmarket Economic Values for Salmon and Wildlife Resources
Until recently, resource economists primarily focused on measuring the direct net value of fish and wildlife resources, when analyzing management options. And the technical literature...
Economics of Endangered Salmon in the Pacific Northwest
Economic factors play important roles in designating endangered species and the design of recovery plans. Economics is important irrespective of the role it plays in decisions to classify...
The Economic Value of Trout Fishery Management Programs
The contingent valuation method is used to estimate the economic value of a trout fishing day at the Cache la Poudre River in Colorado. In addition, changes in daily economic value and...
Managing Instream Flows for Salmonid Spawning Habitat
Detrimental sediment related effects on aquatic habitat for anadromous fisheries include (1) deposition of excessive amounts of fine sediments in spawning gravels, and (2) mobilization...
Managing Reservoir Storage for Instream Flow
Two possible approaches to using a portion of reservoir storage to supply instream flows are 1) to determine a fixed amount to be released each year as minimum instream flows and 2) to...
Natural, Cultural, & Environmental Resource Values Influencing Colorado River Basin Management
The Colorado River Basin supplies water to the seven western states of Wyoming, Colorado, Utah, Arizona, New Mexico, Nevada, and California, and to Mexico. Originally the Colorado River...
Managing Snake River Operations for Juvenile Salmon Migration
A simulation model of Snake River hydrology and water management institutions has been developed. The model was used to investigate management changes to enhance flow conditions for migrating...
Hydro Models and Salmon Recovery in the Northwest
Hydro regulation models provide extensive support for analyzing the efficacy of salmon recovery plans in the Northwest. Power planners developed these computer programs to help plan and...
Snake River Salmon Recovery Plan Development
The process used by the Snake River Salmon Recovery Team to develop its recovery plan is described. Major conditions affecting fish survival are identified. The Team's approach to evaluate...
Columbia River Basin Fish and Wildlife Program Strategy for Salmon
Three species of Snake River salmon have been listed as threatened or endangered under the federal Endangered Species Act. In response, the Northwest Power Planning Council worked with...
Snake Reservoir Drawdown ? A Brief Progress Report
The Northwest Power Planning Council has directed the region to employ the use of 'Drawdown' as tool to help threatened and endangered salmon stocks in Snake and Columbia rivers unless...
Role of Economics in Endangered Species Act Activities Related to Snake River Salmon
The development of recovery actions for the species of Snake River Salmon listed under the Endangered Species Act (ESA) must consider a wide range of actions covering the different life-cycles...
Multiobjective Models for Determining Fresh Water Inflows to Bays and Estuaries
This paper presents two formulations of multiobjective models for the estuary management problem that are based on goal programming procedures. The multiobjectives are selected to be minimum...
Urban Runoff and the Environment
This paper discusses complex water quality problems, including management of urban runoff. Mathematical modelling is used to asses runoff quantity and quality. Environmental impact...
GIS and Fisheries Management
Geographic Information System (GIS) technologies may provide the tool needed to translate and synthesize geographically oriented marine resources information in Florida. Issues facing...
Coastal Management and Ocean Industries in East Germany, from Central Planning Ineffectiveness Towards Local and Regional Development Strategies
In so far, the preconditions for the implementation of decentralized development tools both in coastal management and in ocean industries may be quite ideal in East Germany: there is the...
Free the Elwha|
The Elwha River flows northward from the middle of Washington's Olympic Peninsula to the Strait of Juan de Fuca. As a coastal river basin, it was once home to all five species of Pacific...
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