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Chiang Mai Journal of Science, Faculty of Science, Chiang Mai University
 


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Calculation of Weighted Averages Approach for the Estimation of Ping Tolerance Values


Paper Type 
Contributed Paper
Title 
Calculation of Weighted Averages Approach for the Estimation of Ping Tolerance Values
Author 
Somyot Silalom, James L. Carter, and Porntip Chantaramongkol
Email 
Jeckky@hotmail.com
Abstract:
A biotic index was created and proposed as a tool to assess water quality in the Upper Mae Ping sub-watersheds. The Ping biotic index was calculated by utilizing Ping tolerance values. This paper presents the calculation of  Ping tolerance values of  the collected macroinvertebrates. Ping tolerance values were estimated by a weighted averages approach based on the abundance of macroinvertebrates and six chemical constituents that include conductivity, dissolved oxygen, biochemical oxygen demand, ammonia nitrogen, nitrate nitrogen and orthophosphate. Ping tolerance values range from 0 to 10. Macroinvertebrates assigned a 0 are very sensitive to organic pollution while macroinvertebrates assigned 10 are highly tolerant to pollution.
Start & End Page 
151 - 159
Received Date 
2008-11-01
Revised Date 
Accepted Date 
2009-01-01
Full Text 
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Keyword 
Ping tolerance values, macroinvertebrates, biomonitoring, water quality
Volume 
Vol.37 No.1 (JANUARY 2010)
DOI 
Citation 
Silalom S., Carter J.L., and Chantaramongkol P., Calculation of Weighted Averages Approach for the Estimation of Ping Tolerance Values, Chiang Mai Journal of Science, 2010; 37(1): 151-159.
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