scholarly journals Water-Quality and Biological Characteristics and Responses to Agricultural Land Retirement in Three Streams of the Minnesota River Basin, Water Years 2006-08

2009 ◽  
Author(s):  
Victoria G. Christensen ◽  
Kathy E. Lee ◽  
Christopher A. Sanocki ◽  
Eric H. Mohring ◽  
Richard L. Kiesling
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Agricultural Land ◽  
Biological Characteristics ◽  
Minnesota River Basin ◽  
Minnesota River ◽  
Land Retirement ◽  
Basin Water

Relations between Retired Agricultural Land, Water Quality, and Aquatic-Community Health, Minnesota River Basin

2012 ◽  
Vol 41 (5) ◽  
pp. 1459-1472 ◽  
Author(s):  
Victoria G. Christensen ◽  
Kathy E. Lee ◽  
James M. McLees ◽  
Scott L. Niemela
Keyword(s):  
Water Quality ◽  
Community Health ◽  
River Basin ◽  
Agricultural Land ◽  
Aquatic Community ◽  
Minnesota River Basin ◽  
Minnesota River ◽  
Land Water

Applying Probabilistic Water Quality Standards in River Basin Water Quality Optimization Models

1974 ◽  
Vol 9 (1) ◽  
pp. 25-29
Author(s):  
M. B. Bayer
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Minimum Cost ◽  
Water Quality Standards ◽  
Quality Optimization ◽  
Basin Water ◽  
Do Concentration ◽  
Water Quality Models

Abstract This paper describes a method of applying probabilistic DO (dissolved oxygen) and BOD (biochemical oxygen demand) standards in river basin water quality models. Maximum likelihood estimators for the DO and BOD concentrations variances for each reach are used to obtain a lower bound for BOD so that the probability of violating specified DO and BOD standards is less than Θ per cent in any reach. These boundary values for DO and BOD concentrations are incorporated into a nonlinear water quality optimization model for finding the minimum cost set of wastewater treatment plant efficiencies required to meet DO and BOD standards. The method also provides the minimum DO concentration and the maximum BOD concentration which may be expected to occur 1-Θ of the time for any reach.

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