scholarly journals Historical contributions of phosphorus from natural and agricultural sources and implications for stream water quality, Cheney Reservoir watershed, south-central Kansas

2002 ◽  
Keyword(s):  
Water Quality ◽  
Stream Water ◽  
Stream Water Quality ◽  
South Central ◽  
Reservoir Watershed

GIS and ordination techniques for studying influence of watershed characteristics on river water quality

2011 ◽  
Vol 64 (4) ◽  
pp. 861-870 ◽  
Author(s):  
Yang Ou ◽  
Xiaoyan Wang
Keyword(s):  
Water Quality ◽  
Water Chemistry ◽  
Stream Water ◽  
Buffer Zone ◽  
Stream Water Quality ◽  
Explanatory Variables ◽  
Landscape Characteristics ◽  
Landscape Factors ◽  
Reservoir Watershed ◽  
Landscape Attributes

Landscape characteristics of twenty-eight sub-catchments within the Miyun reservoir watershed in Miyun County, northeast Beijing of China were examined to identify relationships with stream water chemistry. The influences of the entire catchment and 300 m buffer zone on water quality were compared using multiple regression analysis and redundancy analysis during three seasons. Results showed that strong seasonal differences in nitrate, nitrite and ammonium are observed whereas no difference in total phosphorus and conductivity. Landscape factors were significantly correlated to stream water quality. Residential area and stream density contributed markedly to river condition variability. Water quality was better explained by interactions with the landscape during and after rainy season. There was also a seasonal shift in the landscape factors that were the dominant explanatory variables. The relationships between landscape attributes and water quality on watershed scale were slightly different from those on riparian scale; however, landscape attributes may have stronger influences on water chemistry.

Data from selected U.S. Geological Survey National Stream Water-Quality Networks (WQN)

Data Series ◽  
10.3133/ds37 ◽  
1996 ◽  
Author(s):  
Richard B. Alexander ◽  
J.R. Slack ◽  
A.S. Ludtke ◽  
K.K. Fitzgerald ◽  
T.L. Schertz ◽  
...  
Keyword(s):  
Water Quality ◽  
Stream Water ◽  
Geological Survey ◽  
Stream Water Quality

Application of Expert Systems Technology in Water Quality Modeling

1989 ◽  
Vol 21 (8-9) ◽  
pp. 1045-1056 ◽  
Author(s):  
Thomas O. Barnwell ◽  
Linfield C. Brown ◽  
Wiktor Marek
Keyword(s):  
Water Quality ◽  
Expert Systems ◽  
Knowledge Engineering ◽  
Stream Water ◽  
Environmental Modeling ◽  
Water Quality Modeling ◽  
Stream Water Quality ◽  
Quality Model ◽  
Knowledge Based ◽  
Available Technology

Computerized modeling is becoming an integral part of decision making in water pollution control. Expert systems is an innovative methodology that can assist in building, using, and interpreting the output of these models. This paper reviews the use and evaluates the potential of expert systems technology in environmental modeling and describes elements of an expert advisor for the stream water quality model QUAL2E. Some general conclusions are presented about the tools available to develop this system, the level of available technology in knowledge-based engineering, and the value of approaching problems from a knowledge engineering perspective.

scholarly journals Local and downstream cumulative effects of traditional meadow management on stream-water quality and multiple riparian taxa

2021 ◽  
pp. 148601
Author(s):  
Alberto Maceda-Veiga ◽  
Sergio Albacete ◽  
Núria Flor-Arnau ◽  
Cristiana Vieira ◽  
Vicenç Bros ◽  
...  
Keyword(s):  
Water Quality ◽  
Stream Water ◽  
Cumulative Effects ◽  
Stream Water Quality
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